Greenbacker Renewable Energy 10-K 16 Mar 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 02, 2020	Jun. 30, 2019
Cover [Abstract]
Entity Registrant Name	Greenbacker Renewable Energy Co LLC
Entity Central Index Key	0001563922
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity a Well-known Seasoned Issuer	No
Entity a Voluntary Filer	No
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity File Number	000-55610
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Incorporation State Country Code	DE
Entity Filer Category	Non-accelerated Filer
Entity public float			$ 0
Entity Common Stock, Shares Outstanding		49,305,069
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019

CONSOLIDATED STATEMENTS OF ASSE

CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES - USD ($)		Dec. 31, 2019	Dec. 31, 2018
ASSETS
Investments in controlled/affiliated portfolios, at fair value (cost of $415,905,982 and $298,314,385, respectively)		$ 452,072,181	$ 307,176,115
Investments in non-controlled/non-affiliated portfolios, at fair value (cost of $23,103,690 and nil, respectively)		23,103,690
Swap contracts, at fair value		21,223	435,603
Cash and cash equivalents		8,636,839	39,122,635
Restricted cash		429,252
Shareholder receivable		650,000	469,245
Dividend receivable		620,846	488,000
Deferred tax assets, net of valuation allowance		1,313,506	6,051,957
Investment sales receivable		22,013,491
Other assets		611,560	201,074
Total assets		509,472,588	353,944,629
LIABILITIES
Swap contracts, at fair value		4,899,566	311,641
Payable for investments purchased		7,502,267	8,901
Term note payable, net of financing costs		68,886,785	29,527,046
Management fee payable		272,982	588,161
Accounts payable and accrued expenses		419,240	727,175
Shareholder distributions payable		1,784,961	1,260,754
Interest payable		11,933	3,507
Due to advisor			19,181
Payable for repurchases of common stock		2,186,780	1,249,808
Deferred sales commission payable		56,483	191,706
Total liabilities		86,020,997	33,887,880
Commitments and contingencies (See Note 2, Note 5 and Note 9)
MEMBERS' EQUITY (NET ASSETS)
Preferred stock, par value, $.001 per share, 50,000,000 authorized; none issued and outstanding
Common stock, par value, $.001 per share, 350,000,000 authorized; 47,889,610 and 37,003,502 shares issued and outstanding, respectively		47,890	37,004
Paid-in capital in excess of par value		416,611,769	321,741,819
Accumulated losses	[1]	(105,876)	(3,519,212)
Total common members' equity		416,553,783	318,259,611
Special unitholder's equity		6,897,808	1,797,138
Total members' equity (net assets)		423,451,591	320,056,749
Total liabilities and equity (net assets)		509,472,588	353,944,629
Total common members' equity		416,553,783	318,259,611
Net assets, Class A
MEMBERS' EQUITY (NET ASSETS)
Net assets		147,304,141	142,791,899
Net assets, Class C
MEMBERS' EQUITY (NET ASSETS)
Net assets		22,792,345	18,546,310
Net assets, Class I
MEMBERS' EQUITY (NET ASSETS)
Net assets		57,292,421	53,046,260
Net assets, Class P-I
MEMBERS' EQUITY (NET ASSETS)
Net assets		189,009,074	103,742,870
Net assets, Class P-A
MEMBERS' EQUITY (NET ASSETS)
Net assets		$ 155,802	$ 132,272
[1]	Accumulated deficit, accumulated net realized gain on investments, and accumulated unrealized appreciation (depreciation) on investments, net of deferred taxes, foreign currency translation, and swap contracts are included in accumulated losses.

CONSOLIDATED STATEMENTS OF AS_2

CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Investments controlled affiliated at fair value, cost	$ 415,905,982	$ 298,314,385
Investments non-controlled non-affiliated portfolios at fair value, cost	$ 23,103,690
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, authorized	50,000,000	50,000,000
Preferred stock, issued
Preferred stock, outstanding
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized	350,000,000	350,000,000
Common stock, issued	47,889,610	37,003,502
Common stock, outstanding	47,889,610	37,003,502
Net assets, Class A
Common stock, outstanding	17,210,016	16,714,738
Net assets, Class C
Common stock, outstanding	2,718,475	2,222,478
Net assets, Class I
Common stock, outstanding	6,693,658	6,209,416
Net assets, Class P-A
Common stock, outstanding	18,109	15,478
Net assets, Class P-I
Common stock, outstanding	21,249,352	11,841,392

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment income from controlled, affiliated investments:
Dividend income	$ 17,160,351	$ 18,503,814	$ 13,125,642
Interest income	13,060	263,791	107,547
Total investment income from controlled, affiliated investments	17,173,411	18,767,605	13,233,189
Investment income from non-controlled, non-affiliated investments:
Interest income	1,589,294	624,977	106,080
Total investment income	18,762,705	19,392,582	13,339,269
Operating expenses:
Management fee expense	8,461,616	5,803,893	3,490,942
Audit and tax expense	1,156,874	913,509	685,570
Interest and financing expenses	2,812,802	1,793,834	692,265
General and administration expenses	239,202	375,159	421,673
Legal expenses	351,128	139,059	183,545
Directors fees and expenses	398,845	100,209	100,210
Insurance expense	161,610	95,780	64,411
Transfer Agent Expense	477,198	382,943
Other expenses	489,627	106,881	241,611
Total expenses	14,548,902	9,711,267	5,880,227
Net investment income before taxes	4,213,803	9,681,315	7,459,042
Deferred tax (benefit) expense	(3,188,431)	1,458,669	2,619,076
Franchise tax expense	125,143	138,436	23,415
Net investment income	7,277,091	8,084,210	4,816,551
Net change in realized and unrealized gain (loss) on investments, foreign currency translation and deferred tax assets:
Net realized gain on investments	12,915,738		693,882
Net change in unrealized appreciation (depreciation) on:
Investments	27,296,880	2,955,079	5,929,033
Foreign currency translation	7,589	(118,496)	97,763
Swap contracts	(5,002,305)	(32,106)	65,371
Change in benefit from deferred taxes on unrealized appreciation (depreciation) on investments	(7,926,882)	2,986,588	963,720
Net increase in net assets resulting from operations	34,568,111	13,875,275	12,566,320
Net decrease in net assets attributed to special unitholder	(5,270,670)	(560,895)	(1,235,657)
Net increase in net assets attributed to common members	$ 29,297,441	$ 13,314,380	$ 11,330,663
Common stock per share information - basic and diluted:
Net increase in net assets attributed to common members	$ 0.67	$ 0.45	$ 0.6
Weighted average common shares outstanding	43,788,187	29,799,735	18,922,343

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS EQUITY - USD ($)	Common Members	Paid-in capital in excess of par value	Accumulated deficit	Accumulated net realized gain on investments	Accumulated unrealized appreciation (depreciation) on investments, net of deferred taxes	Accumulated unrealized appreciation (depreciation) on foreign currency translation	Accumulated unrealized appreciation (depreciation) on swap contracts	Common members' equity	Special unitholder	Total
Balance at Dec. 31, 2016	$ 14,922	$ 128,425,800	$ (3,629,220)	$ 4,578	$ 4,699,283	$ (187,846)	$ 90,697	$ 129,418,214	$ 586	$ 129,418,800
Balance, shares at Dec. 31, 2016	14,921,922
Proceeds from issuance of common stock, net	$ 8,251	72,411,556						72,419,807		72,419,807
Proceeds from issuance of common stock, net (in shares)	8,251,118
Issuance of common stock under distribution reinvestment plan	$ 534	4,747,000						4,747,534		4,747,534
Issuance of common stock under distribution reinvestment plan (in shares)	533,645
Repurchases of common stock	$ (518)	(4,147,180)						(4,147,698)		(4,147,698)
Repurchases of common stock (in shares)	(517,456)
Offering costs		(926,386)						(926,386)		(926,386)
Shareholder distributions			(11,403,610)					(11,403,610)		(11,403,610)
Distributions to special unitholder
Net investment income (loss)			4,816,551					4,816,551		4,816,551
Net realized gain (loss)				693,882				693,882		693,882
Net change in unrealized appreciation (depreciation) on investments					4,693,376			4,693,376	1,222,583	5,915,959
Net change in unrealized appreciation (depreciation) on foreign currency translation						97,763		97,763		97,763
Net change in unrealized appreciation (depreciation) on swap contracts							65,371	65,371	13,074	78,445
Change in benefit from deferred taxes on unrealized appreciation (depreciation) on investments					963,720			963,720		963,720
Balance at Dec. 31, 2017	$ 23,189	200,510,790	(10,216,279)	698,460	10,356,379	(90,083)	156,068	201,438,524	1,236,243	202,674,767
Balance, shares at Dec. 31, 2017	23,189,229
Proceeds from issuance of common stock, net	$ 13,627	120,313,445						120,327,072		120,327,072
Proceeds from issuance of common stock, net (in shares)	13,625,689
Issuance of common stock under distribution reinvestment plan	$ 694	6,126,095						6,126,789		6,126,789
Issuance of common stock under distribution reinvestment plan (in shares)	694,427
Repurchases of common stock	$ (506)	(4,473,965)						(4,474,471)		(4,474,471)
Repurchases of common stock (in shares)	(505,843)
Offering costs		(734,546)						(734,546)		(734,546)
Shareholder distributions			(17,738,137)					(17,738,137)		(17,738,137)
Distributions to special unitholder
Net investment income (loss)			8,084,210					8,084,210		8,084,210
Net realized gain (loss)
Net change in unrealized appreciation (depreciation) on investments					2,394,184			2,394,184	560,895	2,955,079
Net change in unrealized appreciation (depreciation) on foreign currency translation						(118,496)		(118,496)		(118,496)
Net change in unrealized appreciation (depreciation) on swap contracts							(32,106)	(32,106)		(32,106)
Change in benefit from deferred taxes on unrealized appreciation (depreciation) on investments					2,986,588			2,986,588		2,986,588
Balance at Dec. 31, 2018	$ 37,004	321,741,819	(19,870,206)	698,460	15,737,151	(208,579)	123,962	318,259,611	1,797,138	320,056,749
Balance, shares at Dec. 31, 2018	37,003,502
Proceeds from issuance of common stock, net	$ 11,087	97,330,310						97,341,397		97,341,397
Proceeds from issuance of common stock, net (in shares)	11,086,672
Issuance of common stock under distribution reinvestment plan	$ 784	6,751,893						6,752,677		6,752,677
Issuance of common stock under distribution reinvestment plan (in shares)	784,496
Repurchases of common stock	$ (985)	(8,521,405)						(8,522,390)		(8,522,390)
Repurchases of common stock (in shares)	(985,060)
Offering costs		(690,848)						(690,848)		(690,848)
Shareholder distributions			(25,884,105)					(25,884,105)		(25,884,105)
Distributions to special unitholder									(170,000)	(170,000)
Net investment income (loss)			7,277,091					7,277,091		7,277,091
Net realized gain (loss)				11,265,324				11,265,324	1,650,414	12,915,738
Net change in unrealized appreciation (depreciation) on investments					22,676,163			22,676,163	4,620,717	27,296,880
Net change in unrealized appreciation (depreciation) on foreign currency translation						7,589		7,589		7,589
Net change in unrealized appreciation (depreciation) on swap contracts							(4,001,844)	(4,001,844)	(1,000,461)	(5,002,305)
Change in benefit from deferred taxes on unrealized appreciation (depreciation) on investments					(7,926,882)			(7,926,882)		(7,926,882)
Balance at Dec. 31, 2019	$ 47,890	$ 416,611,769	$ (38,477,220)	$ 11,963,784	$ 30,486,432	$ (200,990)	$ (3,877,882)	$ 416,553,783	$ 6,897,808	$ 423,451,591
Balance, shares at Dec. 31, 2019	47,889,610

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net increase (decrease) in net assets from operations	$ 34,568,111	$ 13,875,275	$ 12,566,320
Adjustments to reconcile net increase in net assets from operations to net cash used in operating activities:
Amortization of deferred financing costs	226,742	222,394	164,725
Amortization and accretion of premium and discount		(88,432)
Purchase of investments	(353,585,860)	(135,052,745)	(117,569,013)
Return of capital from investments	161,551,945	44,566,792	30,412
Proceeds from principal payments and sales of investments	64,254,366	4,621,231	20,996,206
Net realized (gain) on investments	(12,915,738)		(693,882)
Net change in unrealized (appreciation) on investments	(27,296,880)	(2,955,079)	(5,929,033)
Net change in unrealized (appreciation) depreciation on foreign currency translation	(7,589)	118,496	(97,763)
Net change in unrealized (appreciation) depreciation on swap contracts	5,002,305	32,106	(65,371)
Deferred tax expense	4,738,451	(1,527,919)	1,655,356
(Increase) decrease in other assets:
Receivable for investments sold	(22,013,491)
Dividend receivable	(132,846)	(488,000)
Other assets	(410,486)	(126,832)	(9,198)
Increase (decrease) in other liabilities:
Payable for investments purchased	7,493,366	(15,405,304)	15,414,205
Due to advisor, net	(19,181)	8,764	(89,365)
Management fee payable	(315,179)	530,870	(175,565)
Accounts payable and accrued expenses	(307,935)	327,031	(23,495)
Interest payable	8,426	(108,738)	112,245
Net cash used in operating activities	(139,161,473)	(91,450,090)	(73,713,216)
Financing activities:
Borrowings on Credit facility and term note	55,580,682	30,665,460	15,800,000
Paydowns on Credit facility and term note	(14,255,676)	(13,655,794)	(6,324,760)
Payments of financing costs	(2,192,009)	(615,378)
Proceeds from issuance of shares of common stock, net	97,025,448	120,024,951	72,672,757
Distributions paid	(18,607,250)	(11,061,871)	(6,348,757)
Offering costs	(690,848)	(734,546)	(926,386)
Repurchases of common stock	(7,585,418)	(4,194,111)	(4,034,020)
Distribution from special unitholder	(170,000)
Due to dealer manager re: Offering costs			(36,694)
Net cash provided by financing activities	109,104,929	120,428,711	70,802,140
Net increase (decrease) in cash and cash equivalents	(30,056,544)	28,978,621	(2,911,076)
Cash, cash equivalents and restricted cash, beginning of period	39,122,635	10,144,014	13,055,090
Cash, cash equivalents and restricted cash, end of period	9,066,091	39,122,635	10,144,014
Reconciliation of cash, cash equivalents and restricted cash per the Consolidated Statements of Assets and Liabilities
Cash and Cash equivalents	8,636,839	39,122,635	10,144,014
Restricted Cash	429,252
Total cash, cash equivalents and restricted cash	9,066,091	39,122,635	10,144,014
Supplemental disclosure of cash flow information:
Cash interest paid during the period	1,360,409	1,219,237	490,139
Non cash financing activities
Shareholder receivable from sale of common stock	650,000	469,245	225,509
Purchase of investments		8,091	15,414,205
Investments disposed of/received through in-kind transactions			$ 11,420,306

CONSOLIDATED SCHEDULES OF INVES

CONSOLIDATED SCHEDULES OF INVESTMENTS - USD ($)		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018
Shares or Principal Amount		100.00%		100.00%
Cost		$ 415,905,982		$ 298,314,385
Fair Value		452,072,181		307,176,115
LIABILITIES IN EXCESS OF ALL ASSETS OTHER THAN INVESTMENTS		$ (51,724,280)		$ 12,880,634
LIABILITIES IN EXCESS OF ALL ASSETS OTHER THAN INVESTMENTS, Percentage of Net Assets		(12.10%)		4.10%
TOTAL NET ASSETS		$ 423,451,591		$ 320,056,749
Percentage of Net Assets		100.00%	[1]	100.00%	[2]
TOTAL INVESTMENTS
Shares or Principal Amount		112.10%		95.90%
Cost		$ 439,009,672		$ 298,314,385
Fair Value		$ 475,175,871		$ 307,176,115
Percentage of Net Assets		112.10%	[1]	95.90%	[2]
Biomass
Cost		$ 21,425,600
Fair Value		21,425,600
Biomass | Eagle Valley Biomass Portfolio
Cost		21,425,600
Fair Value		21,425,600
Pre-Operational Assets
Cost		95,718,187		$ 50,353,115
Fair Value		95,718,187		50,235,080
Pre-Operational Assets | Colorado CES Portfolio [Member]
Cost		4,517,354
Fair Value		4,517,354
Pre-Operational Assets | Electric City Portfolio [Member]
Cost		4,208,484
Fair Value		4,208,484
Pre-Operational Assets | Opal Portfolio [Member]
Cost		344,949
Fair Value		344,949
Pre-Operational Assets | Oregon Sun Portfolio [Member]
Cost		5,404,787
Fair Value		5,404,787
Pre-Operational Assets | Phoenix Solar Portfolio
Cost		4,051,138		9,964,515
Fair Value		4,051,138		9,964,515
Pre-Operational Assets | Trillium Portfolio [Member]
Cost		24,277,396
Fair Value		24,277,396
Pre-Operational Assets | Turquoise Solar Portfolio
Cost		26,602,532		5,877,188
Fair Value		26,602,532		5,877,188
Pre-Operational Assets | Colorado CSG Solar Portfolio
Cost				27,333,205
Fair Value				27,215,170
Pre-Operational Assets | SE Solar Portfolio
Cost				7,178,207
Fair Value				7,178,207
Pre-Operational Assets | SE Solar Portfolio 2019 [Member]
Cost		5,000,000
Fair Value		5,000,000
Other Investments [Member]
Cost		12,656,710
Fair Value		12,473,975
Other Investments [Member] | Other Portfolios [Member]
Cost		12,656,710		1,279,273
Fair Value		12,473,975		1,263,620
Alternative Energy Wind
Cost		90,618,874		63,446,680
Fair Value		101,660,576		65,165,744
Alternative Energy Wind | Greenbacker Wind Portfolio - California
Cost		9,500,000		9,500,000
Fair Value		8,777,056		8,070,745
Alternative Energy Wind | Greenbacker Wind Portfolio - Iowa [Member]
Cost		20,440,000
Fair Value		20,440,000
Alternative Energy Wind | Greenbacker Wind Portfolio - Montana
Cost		24,756,684		21,709,487
Fair Value		26,451,773		21,956,868
Alternative Energy Wind | Greenbacker Wind Portfolio - Idaho
Cost				7,320,000
Fair Value				6,385,631
Alternative Energy Wind | Greenbacker Wind Portfolio - Vermont
Cost				24,917,193
Fair Value				$ 28,752,500
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Total Investments in controlled/affiliated Portfolios [Member]
Cost		415,905,982
Fair Value		$ 452,072,181
Percentage of Net Assets	[1]	106.70%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Biomass
Shares or Principal Amount		5.10%
Cost		$ 21,425,600
Fair Value		$ 21,425,600
Percentage of Net Assets	[1]	5.10%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Biomass | Eagle Valley Biomass Portfolio
Shares or Principal Amount		100.00%
Cost		$ 21,425,600
Fair Value		$ 21,425,600
Percentage of Net Assets	[1]	5.10%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar
Shares or Principal Amount		40.60%		46.00%
Cost		$ 158,516,291		$ 144,732,656
Fair Value		$ 172,492,229		$ 147,571,531
Percentage of Net Assets		40.60%	[1]	46.00%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Conic Portfolio
Cost		$ 12,077,823
Fair Value		$ 17,828,206
Percentage of Net Assets	[1]	4.20%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | East to West Solar Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 39,109,190		$ 37,079,887
Fair Value		$ 41,214,191		$ 33,665,088
Percentage of Net Assets		9.70%	[1]	10.50%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Foresight Solar Portfolio
Cost		$ 13,790,000		$ 13,650,000
Fair Value		$ 14,965,339		$ 14,357,201
Percentage of Net Assets		3.50%	[1]	4.50%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Golden Horizons Solar Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 9,290,000		$ 9,400,000
Fair Value		$ 15,132,017		$ 14,445,071
Percentage of Net Assets		3.60%	[1]	4.50%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Green Maple Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 26,561,596		$ 17,582,823
Fair Value		$ 27,268,058		$ 16,066,837
Percentage of Net Assets		6.40%	[1]	5.00%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Longleaf Solar Portfolio [Member]
Cost		$ 22,797,404
Fair Value		$ 24,605,536
Percentage of Net Assets	[1]	5.80%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Magnolia Sun Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 10,775,000		$ 10,775,000
Fair Value		$ 6,460,457		$ 8,258,786
Percentage of Net Assets		1.50%	[1]	2.60%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Midway III Solar Portfolio
Shares or Principal Amount				100.00%
Cost		$ 10,575,394		$ 11,552,904
Fair Value		$ 11,475,652		$ 13,265,608
Percentage of Net Assets		2.70%	[1]	4.10%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Six States Solar Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 12,655,306		$ 12,470,306
Fair Value		$ 12,799,005		$ 13,440,025
Percentage of Net Assets		3.00%	[1]	4.20%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Sunny Mountain Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 884,578		$ 884,578
Fair Value		$ 743,768		$ 1,107,041
Percentage of Net Assets		0.20%	[1]	0.30%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Raleigh Portfolio
Cost				$ 20,822,198
Fair Value				$ 21,358,997
Percentage of Net Assets	[2]			6.70%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Commercial Solar | Sun Farm Portfolio
Shares or Principal Amount				100.00%
Cost				$ 10,514,960
Fair Value				$ 11,606,877
Percentage of Net Assets	[2]			3.60%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Residential Solar
Shares or Principal Amount		11.20%		13.20%
Cost		$ 36,103,136		$ 37,503,136
Fair Value		$ 47,432,455		$ 41,918,094
Percentage of Net Assets		11.20%	[1]	13.20%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Residential Solar | Canadian Northern Lights Portfolio
Shares or Principal Amount	[3]	100.00%		100.00%
Cost	[3]	$ 1,603,136		$ 1,603,136
Fair Value	[3]	$ 1,611,955		$ 2,081,554
Percentage of Net Assets	[3]	0.40%	[1]	0.70%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Residential Solar | Greenbacker Residential Solar Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 28,100,000		$ 28,100,000
Fair Value		$ 32,540,979		$ 27,372,253
Percentage of Net Assets		7.70%	[1]	8.60%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Residential Solar | Greenbacker Residential Solar Portfolio II
Cost		$ 6,400,000		$ 6,400,000
Fair Value		$ 13,279,521		$ 10,763,559
Percentage of Net Assets		3.10%	[1]	3.40%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Residential Solar | Enfinity Colorado DHA Portfolio
Shares or Principal Amount				100.00%
Cost				$ 1,400,000
Fair Value				$ 1,700,728
Percentage of Net Assets	[2]			0.50%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Wind
Shares or Principal Amount		24.00%		20.40%
Cost		$ 90,618,874		$ 63,446,680
Fair Value		$ 101,660,576		$ 65,165,744
Percentage of Net Assets		24.00%	[1]	20.40%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Wind | Greenbacker Wind Portfolio - California
Shares or Principal Amount		100.00%		100.00%
Cost		$ 9,500,000		$ 9,500,000
Fair Value		$ 8,777,056		$ 8,070,745
Percentage of Net Assets		2.10%	[1]	2.50%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Wind | Greenbacker Wind Portfolio - HoldCo
Shares or Principal Amount		100.00%
Cost		$ 25,753,111
Fair Value		$ 35,089,021
Percentage of Net Assets	[1]	8.30%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Wind | Greenbacker Wind Portfolio - Iowa [Member]
Cost		$ 20,440,000
Fair Value		$ 20,440,000
Percentage of Net Assets	[1]	4.80%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Wind | Greenbacker Wind Portfolio - Massachusetts [Member]
Cost		$ 10,169,079
Fair Value		$ 10,902,726
Percentage of Net Assets	[1]	2.60%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Wind | Greenbacker Wind Portfolio - Montana
Shares or Principal Amount		100.00%		100.00%
Cost		$ 24,756,684		$ 21,709,487
Fair Value		$ 26,451,773		$ 21,956,868
Percentage of Net Assets		6.20%	[1]	6.90%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Wind | Greenbacker Wind Portfolio - Vermont
Shares or Principal Amount				100.00%
Cost				$ 24,917,193
Fair Value				$ 28,752,500
Percentage of Net Assets	[2]			9.00%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets
Shares or Principal Amount		22.70%		15.60%
Cost		$ 95,718,187		$ 50,353,115
Fair Value		$ 95,718,187		$ 50,235,080
Percentage of Net Assets		22.70%	[1]	15.60%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Citrine Portfolio [Member]
Shares or Principal Amount		100.00%
Cost		$ 3,411,249
Fair Value		$ 3,411,249
Percentage of Net Assets	[1]	0.80%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Colorado CES Portfolio [Member]
Shares or Principal Amount		100.00%
Cost		$ 4,517,354
Fair Value		$ 4,517,354
Percentage of Net Assets	[1]	1.10%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Electric City Portfolio [Member]
Shares or Principal Amount		100.00%
Cost		$ 4,208,484
Fair Value		$ 4,208,484
Percentage of Net Assets	[1]	1.00%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Omni DG Portfolio
Shares or Principal Amount		100.00%
Cost		$ 17,900,298
Fair Value		$ 17,900,298
Percentage of Net Assets	[1]	4.20%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Opal Portfolio [Member]
Shares or Principal Amount		100.00%
Cost		$ 344,949
Fair Value		$ 344,949
Percentage of Net Assets	[1]	0.10%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Oregon Sun Portfolio [Member]
Shares or Principal Amount		100.00%
Cost		$ 5,404,787
Fair Value		$ 5,404,787
Percentage of Net Assets	[1]	1.30%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Phoenix Solar Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 4,051,138		$ 9,964,515
Fair Value		$ 4,051,138		$ 9,964,515
Percentage of Net Assets		1.00%	[1]	3.10%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Trillium Portfolio [Member]
Cost		$ 24,277,396
Fair Value		$ 24,277,396
Percentage of Net Assets	[1]	5.70%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Turquoise Solar Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 26,602,532		$ 5,877,188
Fair Value		$ 26,602,532		$ 5,877,188
Percentage of Net Assets		6.30%	[1]	1.80%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | Colorado CSG Solar Portfolio
Shares or Principal Amount				100.00%
Cost				$ 27,333,205
Fair Value				$ 27,215,170
Percentage of Net Assets	[2]			8.50%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | SE Solar Portfolio
Shares or Principal Amount				100.00%
Cost				$ 7,178,207
Fair Value				$ 7,178,207
Percentage of Net Assets	[2]			2.20%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Pre-Operational Assets | SE Solar Portfolio 2019 [Member]
Shares or Principal Amount		100.00%
Cost		$ 5,000,000
Fair Value		$ 5,000,000
Percentage of Net Assets	[1]	1.20%
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Other Investments [Member]
Shares or Principal Amount		2.90%		0.40%
Cost		$ 12,656,710		$ 1,279,273
Fair Value		$ 12,473,975		$ 1,263,620
Percentage of Net Assets		2.90%	[1]	0.40%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Other Investments [Member] | Other Portfolios [Member]
Cost	[4]	$ 12,656,710		$ 1,279,273
Fair Value	[4]	$ 12,473,975		$ 1,263,620
Percentage of Net Assets	[4]	2.90%	[1]	0.40%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Energy Efficiency in the United States [Member] | GREC Energy Efficiency Portfolio
Shares or Principal Amount		100.00%		100.00%
Cost		$ 388,044		$ 447,885
Fair Value		$ 390,019		$ 470,406
Percentage of Net Assets		0.10%	[1]	0.10%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Energy Efficiency in the United States [Member] | Renew AEC One, LLC
Shares or Principal Amount		$ 551,640
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Energy Efficiency
Shares or Principal Amount		0.20%		0.30%
Cost		$ 867,184		$ 999,525
Fair Value		$ 869,159		$ 1,022,046
Percentage of Net Assets		0.20%	[1]	0.30%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Energy Efficiency | Renew AEC One, LLC
Interest	[5]	10.25%		10.25%
Maturity		Feb. 24, 2025		Feb. 25, 2025
Shares or Principal Amount				$ 551,640
Cost		$ 479,140		551,640
Fair Value		$ 479,140		$ 551,640
Percentage of Net Assets		0.10%	[1]	0.20%	[2]
Limited Liability Company Member Interests in the United States - Not Readily Marketable [Member] | Alternative Energy Wind | Greenbacker Wind Portfolio - Idaho
Shares or Principal Amount				100.00%
Cost				$ 7,320,000
Fair Value				$ 6,385,631
Percentage of Net Assets	[2]			2.00%
Secured Loans - Commercial Solar - Not readily marketable
Shares or Principal Amount		5.40%
Cost		$ 23,103,690
Fair Value		$ 23,103,690
Percentage of Net Assets	[1]	5.40%
Secured Loans - Commercial Solar - Not readily marketable | Total Investments in non-controlled/non-affiliated portfolios [Member]
Cost		$ 23,103,690
Fair Value		$ 23,103,690
Percentage of Net Assets		5.40%
Secured Loans - Commercial Solar - Not readily marketable | Encore Loan [Member]
Interest		10.00%
Maturity		Oct. 11, 2020
Shares or Principal Amount		$ 5,000,680
Cost		5,000,680
Fair Value		$ 5,000,680
Percentage of Net Assets	[1]	1.20%
Secured Loans - Commercial Solar - Not readily marketable | Hudson Loan [Member]
Interest		8.00%
Maturity		Mar. 31, 2020
Shares or Principal Amount		$ 9,481,127
Cost		9,481,127
Fair Value		$ 9,481,127
Percentage of Net Assets	[1]	2.20%
Secured Loans - Commercial Solar - Not readily marketable | New Market Loan [Member]
Interest		9.00%
Maturity		Oct. 3, 2020
Shares or Principal Amount		$ 5,000,000
Cost		5,000,000
Fair Value		$ 5,000,000
Percentage of Net Assets	[1]	1.20%
Secured Loans - Commercial Solar - Not readily marketable | SE Solar Loan
Interest		9.00%
Maturity		Feb. 21, 2020
Shares or Principal Amount		$ 1,000,000
Cost		1,000,000
Fair Value		$ 1,000,000
Percentage of Net Assets	[1]	0.20%
Secured Loans - Commercial Solar - Not readily marketable | TUUSSO Loan [Member]
Interest		8.00%
Maturity		Jun. 30, 2020
Shares or Principal Amount		$ 2,621,883
Cost		2,621,883
Fair Value		$ 2,621,883
Percentage of Net Assets	[1]	0.60%
[1]	Percentages are based on net assets of $423,451,591 as of December 31, 2019.
[2]	Percentages are based on net assets of $320,056,749 as of December 31, 2018
[3]	Portfolio is located outside of the United States of America.
[4]	Includes pre-acquisition and due diligence expenses.
[5]	Per the loan agreement, interest commenced on January 24, 2016.

CONSOLIDATED SCHEDULES OF INV_2

CONSOLIDATED SCHEDULES OF INVESTMENTS (Interest Rate Swaps) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Notional Amount	$ 93,920,446
Interest Rate Swaps [Member]
Value	(4,878,343)	$ 123,962
Upfront Premiums Paid (Received)
Fifth Third Financial Risk Solutions Due 07/09/2021 [Member] | Interest Rate Swaps [Member]
Pay / Receive Floating Rate	Receive	Receive
Floating Rate Index	1-MO-USD-LIBOR	1-MO-USD-LIBOR
Fixed Pay Rate	1.11%	1.11%
Payment Frequency	Monthly	Monthly
Maturity Date	Jul. 9, 2021	Jul. 9, 2021
Notional Amount	$ 3,320,556	$ 3,607,222
Value	21,223	107,431
Upfront Premiums Paid (Received)
Fifth Third Financial Risk Solutions Due 02/29/2032 [Member] | Interest Rate Swaps [Member]
Pay / Receive Floating Rate	Receive	Receive
Floating Rate Index	1-MO-USD-LIBOR	1-MO-USD-LIBOR
Fixed Pay Rate	2.261%	2.261%
Payment Frequency	Monthly	Monthly
Maturity Date	Feb. 29, 2032	Feb. 29, 2032
Notional Amount	$ 18,981,540	$ 20,668,547
Value	(611,198)	328,172
Upfront Premiums Paid (Received)
Fifth Third Financial Risk Solutions Due 12/31/2038 [Member] | Interest Rate Swaps [Member]
Pay / Receive Floating Rate	Receive	Receive
Floating Rate Index	1-MO-USD-LIBOR	1-MO-USD-LIBOR
Fixed Pay Rate	2.648%	2.648%
Payment Frequency	Monthly	Monthly
Maturity Date	Dec. 31, 2038	Dec. 31, 2038
Notional Amount	$ 27,662,350	$ 29,624,945
Value	(1,725,805)	(190,440)
Upfront Premiums Paid (Received)
Fifth Third Financial Risk Solutions Due 12/31/2038 [Member] | Interest Rate Swaps [Member]
Pay / Receive Floating Rate	Receive	Receive
Floating Rate Index	1-MO-USD-LIBOR	1-MO-USD-LIBOR
Fixed Pay Rate	2.965%	2.965%
Payment Frequency	Monthly	Monthly
Maturity Date	Dec. 31, 2038	Dec. 31, 2038
Notional Amount	$ 3,946,615	$ 4,180,063
Value	(359,271)	(121,201)
Upfront Premiums Paid (Received)
Fifth Third Financial Risk Solutions Due 12/31/2034 [Member] | Interest Rate Swaps [Member]
Pay / Receive Floating Rate	Receive
Floating Rate Index	1-MO-USD-LIBOR
Fixed Pay Rate	2.668%
Payment Frequency	Monthly
Maturity Date	Dec. 31, 2034
Notional Amount	$ 37,560,113
Value	(2,203,292)
Upfront Premiums Paid (Received)

Organization and Operations of

Organization and Operations of the Company	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations of the Company	Note 1. Organization and Operations of the Company Greenbacker Renewable Energy Company LLC (the "LLC"), a Delaware limited liability company, formed in December 2012, is an externally managed energy company that acquires and manages income-generating renewable energy and energy efficiency projects, and other energy-related businesses, as well as finances the construction and/or operation of these and sustainable development projects and businesses. The LLC conducts substantially all its operations through its wholly-owned subsidiary, Greenbacker Renewable Energy Corporation ("GREC"). GREC is a Maryland corporation formed in November 2011 and the LLC currently holds all the outstanding shares of capital stock of GREC. GREC Entity HoldCo LLC ("GREC HoldCo"), a wholly-owned subsidiary of GREC, was formed in Delaware in June 2016. The use of "we," "us," "our" and the "company" refers, collectively, to Greenbacker Renewable Energy Company LLC, Greenbacker Renewable Energy Corporation, and GREC HoldCo. We are externally managed and advised by our advisor, Greenbacker Capital Management LLC (the "advisor" or "GCM"), a renewable energy, energy efficiency and sustainability related project acquisition, consulting and development company that is registered as an investment adviser under the Investment Advisers Act of 1940, as amended ("Advisers Act"). The LLC's fiscal year end is December 31. Pursuant to an initial Registration Statement filed in December 2011 (File No. 333-178786-01) and a second Registration Statement filed in February 2017 (File No. 333-211571), the company offered up to $1,000,000,000 in shares of limited liability company interests, or the shares, including up to $200,000,000 of shares pursuant to the company's Distribution Reinvestment Plan (the "DRP"). As of March 29, 2019, the company terminated its public offering of the shares as well as its privately offered Class P-A shares. While the company publicly offered three classes of shares: Class A, C and I, currently the company is only privately offering Class P-I shares on a continuous basis. The share classes had different selling commissions, dealer manager fees and there is an ongoing distribution fee with respect to Class C shares. The company has adopted the DRP pursuant to which a shareholder owning publicly offered share classes may elect to have the full amount of cash distributions reinvested in additional shares. Following the termination of the company's public offering of shares, the DRP and the share repurchase plan will continue to be available to existing investors. As of June 4, 2019, pursuant to our Registration Statement on Form S-3 (File No. 333-231960) we are offering a maximum of $10,000,000 in shares of our common stock to our existing stockholders pursuant to the DRP. Each quarter, our advisor, utilizing the services of an independent valuation firm, when necessary, reviews and approves the net asset value for each class of shares, subject to the oversight of the company's board of directors. To the extent that the net asset value per share on the most recent valuation date increases or decreases, the company will adjust the offering price of the P-I shares to the then-net asset value per share. Five days after the publishing of each quarter-end valuation, Class A, C and I shares will be offered pursuant to the DRP at a price equal to the net asset value. As of December 31, 2019, the company has made solar, wind, biomass, and energy efficiency investments in 36 portfolios, 35 domiciled in the United States and one in Canada, as well as six secured loans in the United States (See Note 3). As of December 31, 2018, the company has made solar, wind and energy efficiency investments in 26 portfolios, 25 domiciled in the United States and one in Canada, as well as one energy efficiency secured loan in the United States.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Significant Accounting Policies	Note 2. Significant Accounting Policies Basis of Presentation The company's consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles ("GAAP"), which requires the use of estimates, assumptions and the exercise of subjective judgment as to future uncertainties. Actual results could differ from those estimates, assumptions, and judgments. Significant items subject to such estimates will include determining the fair value of investments, revenue recognition, income tax uncertainties, and other contingencies. The consolidated financial statements of the company include the accounts of the LLC and its consolidated subsidiaries, GREC, GREC HoldCo, and Danforth Shared Services LLC which provides administrative services to the company. All intercompany accounts and transactions have been eliminated. The company's consolidated financial statements are prepared using the specialized accounting principles of Accounting Standards Codification Topic 946, Financial Services—Investment Companies ("ASC Topic 946"). In accordance with this specialized accounting guidance, the company recognizes and carries all of its investments at fair value with changes in fair value recognized in earnings. Additionally, the company will not apply the equity method of accounting to its investments. The company carries its liabilities at amounts payable, net of unamortized premiums or discounts. The company does not currently plan to elect to carry its non-investment liabilities at fair value. Net assets are calculated as the carrying amounts of assets, including the fair value of investments, less the carrying amounts of its liabilities. The financial information associated with the December 31, 2019 consolidated financial statements has been prepared by management and, in the opinion of management, contains all adjustments and eliminations necessary for a fair presentation in accordance with GAAP. Basis of Consolidation As provided under Regulation S-X and ASC Topic 946, the company will generally not consolidate its investment in a company other than a wholly-owned investment company or controlled operating company whose business consists of providing services to the company. Accordingly, the company consolidated the accounts of the company's wholly-owned subsidiaries to meet the aforementioned criteria in its consolidated financial statements. Cash and Cash Equivalents Cash consists of demand deposits at a financial institution. Such deposits may be in excess of the Federal Deposit Insurance Corporation insurance limits. The company has not experienced any losses in any such accounts. The company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Short-term investments that are cash equivalents, which are considered level 1 investments, are stated at cost, which approximates fair value. Restricted Cash Restricted cash consists of cash accounts or letters of credit that are restricted for use on specific investments. As of December 31,2019, we have one restricted cash account that serves as collateral for a letter of credit related to funding of a specific "to be constructed" investment. Foreign Currency Translation The accounting records of the company are maintained in U.S. Dollars. The fair value of investments and other assets and liabilities denominated in non-U.S. currencies are translated into U.S. Dollars using the exchange rate at the end of each reporting period. Amounts related to the purchases and sales of investments, investment income and expenses are translated at the rates of exchange prevailing on the respective dates of such transactions. Net unrealized currency gains and losses arising from valuing foreign currency denominated assets and liabilities at the current exchange rate are reflected as part of net change in unrealized appreciation (depreciation) on translation of assets and liabilities denominated in foreign currencies in the consolidated statements of operations. Foreign security and currency translations may involve certain considerations and risks not typically associated with investing in U.S. companies and U.S. government securities. These risks include, but are not limited to, currency fluctuations and revaluations and future adverse political, social and economic developments, which could cause investments in foreign markets to be less liquid and prices more volatile than those of comparable U.S. companies or U.S. government securities. Valuation of Investments at Fair Value Accounting Standards Codification Topic 820, Fair Value Measurement ("ASC Topic 820") defines fair value, establishes a framework for measuring fair value in accordance with GAAP and expands disclosures about fair value. The company recognizes and accounts for its investments at fair value. The fair value of the investments does not reflect transaction costs that may be incurred upon disposition of the investments. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is an exchange price notion under which fair value is the price in an orderly transaction between market participants to sell an asset or transfer a liability in the market in which the reporting entity would transact for the asset or liability. The advisor has established procedures to estimate the fair value of its investments which the company's board of directors has reviewed and approved. The company will use observable market data to estimate the fair value of investments to the extent that such market data is available. In the absence of quoted market prices in active markets, or quoted market prices for similar assets in markets that are not active, the company will use the valuation methodologies described below with unobservable data based on the best available information in the circumstances, which incorporates the company's assumptions about the factors that a market participant would use to value the asset. For investments for which quoted market prices are not available, which will comprise most of our investment portfolio, fair value will be estimated by using the income or market approach. The income approach assumes that value is created by the expectation of future benefits discounted to a current value and the fair value estimate is the amount an investor would be willing to pay to receive those future benefits. The market approach compares recent comparable transactions to the investment or an offer to purchase an investment based upon a firm bid, a signed term sheet and/or a signed purchase agreement. Adjustments are made to account for the probability of the deal closing and any dissimilarity between the comparable transactions and the investments. Pre-operational assets are held at cost until they are operational. Therefore, the fair value associated with these assets are essentially cost. These valuation methodologies involve a significant degree of judgment on the part of our advisor. In determining the appropriate fair value of an investment using these approaches, the most significant information and assumptions include, as applicable: available current market data, including relevant and applicable comparable market transactions, applicable market yields and multiples, security covenants, call protection provisions, information rights, the nature and realizable value of any collateral, the investment's ability to make payments, its earnings and discounted cash flows, the markets in which the project does business, comparisons of financial ratios of peer companies that are public, comparable mergers and acquisitions, the principal market and enterprise values, environmental factors, among other factors. The estimated fair values will not necessarily represent the amounts that may be ultimately realized due to the occurrence or non-occurrence of future circumstances that cannot be reasonably determined. Because of the inherent uncertainty of the valuation of the investments, the estimate of fair values may differ significantly from the value that would have been used had a broader market for the investments existed. The authoritative accounting guidance prioritizes the use of market-based inputs over entity-specific inputs and establishes a three-level hierarchy for fair value measurements based upon the transparency of inputs to the valuation. The three levels of valuation hierarchy are defined as follows: Level 1: Unadjusted quoted prices for identical assets or liabilities in active markets. Level 2: Other significant observable inputs that are sourced either directly or indirectly from publications or pricing services, including dealer or broker markets, for identical or comparable assets or liabilities. Generally, these inputs should be widely accepted and public, non-proprietary and sourced from an independent third party. Level 3: Inputs derived from a significant amount of unobservable market data and derived primarily through the use of internal valuation methodologies In all cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls will be determined based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of an input to the fair value measurement in its entirety requires judgment and considers factors specific to each investment. Calculation of Net Asset Value Net asset value by share class is calculated by subtracting total liabilities for each class from the total carrying amount of all assets for that class, which includes the fair value of investments. Net asset value per share is calculated by dividing net asset value for each class by the total number of outstanding common shares for that class on the reporting date. Earnings (Loss) per Share In accordance with the provisions of ASC Topic 260 — Earnings per Share ("ASC Topic 260"), basic earnings per share is computed by dividing earnings available to common members by the weighted average number of shares outstanding during the period. Other potentially dilutive common shares, and the related impact to earnings, are considered when calculating earnings per share on a diluted basis. The following information sets forth the computation of the weighted average basic and diluted net increase in net assets attributed to common members per share for the years ended December 31, 2019, 2018 and 2017. For the year ended For the year ended For the year ended Basic and diluted Net increase in net assets resulting from operations attributed to common members $ 29,297,441 $ 13,314,380 $ 11,330,663 Weighted average common shares outstanding 43,788,187 29,799,735 18,922,343 Net increase in net assets resulting from operations attributed to common members per share $ 0.67 $ 0.45 $ 0.60 Revenue Recognition To the extent the company expects to collect such amounts, interest income is recorded on an accrual basis. If there is reason to doubt an ability to collect such interest, interest receivable on loans and debt securities is not accrued for accounting purposes. Original issue discounts, market discounts or market premiums are accreted or amortized using the effective interest method as interest income. Prepayment premiums on loans and debt securities are recorded as interest income when received. Any application, origination or other fees earned by the company in arranging or issuing debt are amortized over the expected term of the loan. Loans are placed on non-accrual status when principal and interest are 90 days or more past due, or when there is a reasonable doubt that principal or interest will be collected. Accrued interest is generally reversed when a loan is placed on non-accrual. Interest payments received on non-accrual loans may be recognized as income or applied to principal depending upon management's judgment regarding collectability. Non-accrual loans are generally restored to accrual status when past due and principal and interest is paid and, in management's judgment, is likely to remain current. Dividend income is recorded (1) on the ex-dividend date for publicly issued securities and (2) on the ex-dividend date for private investments. The timing and amount of dividend income is determined on at least a quarterly basis by GREC. This process includes an analysis at the individual project company level based on cash available from operations and working capital needed for the project company operations. Dividend income from our privately held, equity investments are recognized when approved. Dividends received from the company's project companies, which generally reflect net cash flow from operations, are declared, accrued and paid on a quarterly basis at a minimum. Net Realized Gains or Losses and Net Change in Unrealized Appreciation or Depreciation on Investments Realized gains or losses will be measured as the difference between the net proceeds from the sale, repayment, or disposal of an asset and the adjusted cost basis of the asset, without regard to unrealized appreciation or depreciation previously recognized. Net change in unrealized appreciation or depreciation will reflect the change in investment values during the reporting period, including any reversal of previously recorded unrealized appreciation or depreciation, when gains or losses are realized. Payment-in-Kind Interest For loans and debt securities with contractual payment-in-kind interest, if the fair value of the investment indicates that such interest is collectible, any interest will be added to the principal balance of such investments and be recorded as income. Distribution Policy Distributions to members, if any, will be authorized and declared by our board of directors quarterly in advance and paid monthly. From time to time, we may also pay interim special distributions in the form of cash or shares, with the approval of our board of directors. Distributions will be made on all classes of shares at the same time. The cash distributions with respect to the Class C shares will be lower than the cash distributions with respect to the company's other share classes because of the distribution fee associated with the Class C shares, which is allocated specifically to Class C net assets. Amounts distributed to each class are allocated amongst the holders of the shares in such class in proportion to their shares. Distributions declared by our board of directors are recognized as distribution liabilities on the ex-dividend date. Organization and Offering Costs Organization and offering costs ("O&O costs"), other than sales commissions and the dealer manager fee, were initially paid by our advisor and/or dealer manager on behalf of the company. These O&O costs included all costs previously paid or to be paid by the company in connection with its formation and the offering of its shares pursuant to now-terminated Registration Statements on Form S-1 (File No. 333-178786-01 and File No. 333-211571, respectively) and a private placement memorandum, including legal, accounting, printing, mailing and filing fees, charges of the company's escrow holder, transfer agent fees, due diligence expense reimbursements to participating broker-dealers included in detailed and itemized invoices and costs in connection with administrative oversight of the offering and marketing process, and preparing supplemental sales materials, holding educational conferences, and attending retail seminars conducted by broker-dealers. The company was obligated to reimburse our advisor for O&O costs that it incurred on behalf of the company, in accordance with the advisory agreement, but with respect to the company's public offerings, only to the extent that the reimbursement would not cause the selling commissions, the dealer manager fee and the other organization and offering expenses borne by the company to exceed 15% of gross offering proceeds as of the date of reimbursement. Total O&O costs related to the terminated Registration Statements amounted to $9.4 million, approximately 3.8% of gross offering proceeds raised pursuant to such Registration Statements. The costs incurred by our advisor and/or dealer manager are recognized as a liability of the company to the extent that the company is obligated to reimburse our advisor and/or dealer manager, subject to the 15% of gross offering proceeds limitation described above. When recognized by the company, organizational costs are expensed and offering costs, excluding selling commissions and dealer manager fees, are recognized as a reduction of the proceeds from the offering. The following table provides information in regard to the status of O&O costs (in 000's) as of December 31, 2019 and 2018: December 31, December 31, Total O&O Costs Incurred by the Advisor and Dealer Manager $ 9,822 $ 9,371 Amounts previously reimbursed to the Advisor/Dealer Manager by the company 9,822 9,106 Amounts payable to Advisor by the company - 19 Amounts of the contingent liability subject to payment by the company only upon adequate gross offering proceeds being raised - 246 Financing Costs Financing costs related to debt liabilities incurred by the company, GREC or any wholly-owned holding company formed specifically to be a credit agreement counterparty are presented on the consolidated statements of assets and liabilities as a direct deduction from the carrying amount of that debt liability. Financing costs are deferred and amortized using the straight-line method over the life of the debt liability. Capital Gains Incentive Allocation and Distribution Pursuant to the terms of the LLC's amended and restated limited liability company agreement, a capital gains incentive fee will be earned by an affiliate of our advisor on realized gains (net of realized and unrealized losses) since inception from the sale of investments from the company's portfolio during operations prior to a liquidation of the company. While the terms of the advisory agreement neither include nor contemplate the inclusion of unrealized gains in the calculation of the capital gains incentive fee, the company will include unrealized gains in the calculation of the capital gains incentive distribution pursuant to an interpretation of an American Institute for Certified Public Accountants Technical Practice Aid for investment companies. This amount reflects the incentive distribution that would be payable if the company's entire portfolio was liquidated at its fair value as of the consolidated statements of assets and liabilities date even though the advisor is not entitled to an incentive distribution with respect to unrealized gains unless and until such gains are realized. Thus, on each date that net asset value is calculated, the company calculates for the capital gains incentive distribution by calculating such distribution as if it were due and payable as of the end of such period and reflected as an allocation of equity between common members and the Special Unitholder. As of December 31, 2019, and 2018, a capital gains incentive distribution allocation in the amounts of $6,897,808 and $1,797,138, respectively, was recorded in the consolidated statements of assets and liabilities as Special unitholder's equity. Deferred Sales Commissions The company defers certain costs, principally sales commissions and related compensation, which are paid to the dealer manager and may be reallowed to financial advisors and broker/dealers in the future in connection with the sale of Class C shares sold with a reduced front-end load sales charge. The costs expected to be incurred at the time of the sale of Class C shares are recorded as a liability on the date of sale and are amortized on a straight-line basis over the period beginning at the time of sale and ending on the date which approximates an expected liquidity event for the company. As of December 31, 2019, and December 31, 2018, the company recorded a liability for deferred sales commissions in the amount of $56,483 and $191,706, respectively. Reclassifications Certain prior year amounts have been reclassified to conform with current year presentation. These reclassifications had no impact on prior periods' results. Derivative Instruments The company may utilize interest rate swaps to modify interest rate characteristics of existing debt obligations to manage interest rate exposure. These are recorded at fair value either as assets or liabilities in the accompanying consolidated statements of assets and liabilities with changes in the fair value of interest rate swaps during the period recognized as either an unrealized appreciation or depreciation in the accompanying consolidated statements of operations. On the expiration, termination or settlement of a derivatives contract, the company generally records a gain or loss. When there is a master netting agreement with a financial institution, any gain or loss on interest rate swaps are netted for financial statement presentation. The fair value of interest rate swap contracts open as of December 31, 2019 is included on the schedule of investments by contract. For the year ended December 31, 2019, the company's average monthly notional exposure to interest rate swap contracts was $93,920,446. Consolidated Statements of Assets and Liabilities — Fair Values of Derivatives at December 31, 2019 Asset Derivatives Liability Derivatives Risk Exposure Consolidated Statement of Assets and Liabilities Location Fair Value Consolidated Statement of Assets and Liabilities Location Fair Value Swaps Interest Rate Risk Swap contracts, at fair value $ 21,223 Swap contracts, at fair value $ 4,899,566 $ 21,223 $ 4,899,566 Consolidated Statements of Assets and Liabilities — Fair Values of Derivatives at December 31, 2018. Asset Derivatives Liability Derivatives Risk Exposure Consolidated Statement of Assets and Liabilities Location Fair Value Consolidated Statement of Assets and Liabilities Location Fair Value Swaps Interest Rate Risk Swap contracts, at fair value $ 435,603 Swap contracts, at fair value $ 311,641 $ 435,603 $ 311,641 The effect of derivative instruments on the Consolidated Statements of Operations Risk Exposure Change in net unrealized depreciation on derivative transactions for the year ended Change in net unrealized depreciation on derivative transactions for the year ended Change in net unrealized appreciation on derivative transactions for the year ended Swaps Interest Rate Risk $ (5,002,305 ) $ (32,106 ) $ 65,371 $ (5,002,305 ) $ (32,106 ) $ 65,371 Risk Exposure Investment interest income from non-controlled, non-affiliated investments for the year ended Investment interest income from non-controlled, non-affiliated investments for the year ended Investment interest income from non-controlled, non-affiliated investments for the year ended Swaps Interest Rate Risk $ - $ 189,178 $ - $ - $ 189,178 $ - Risk Exposure Other expenses for the year ended Other expenses for the year ended Other expenses for the year ended Swaps Interest Rate Risk $ 229,731 $ - $ 111,831 $ 229,731 $ - $ 111,831 By using derivative instruments, the company is exposed to the counterparty's credit risk — the risk that derivative counterparties may not perform in accordance with the contractual provisions offset by the value of any collateral received. The company's exposure to credit risk associated with counterparty non-performance is limited to collateral posted and the unrealized gains inherent in such transactions that are recognized in the consolidated statement of assets and liabilities. The company minimizes counterparty credit risk through credit monitoring procedures and managing margin and collateral requirements, as appropriate. Regarding our investment in the Canadian Northern Lights Portfolio, we have foreign currency risk related to our revenue and operating expenses which are denominated in the Canadian Dollars as opposed to the U.S. Dollars. Income Taxes The LLC intends to operate so that it will qualify to be treated as a partnership for U.S. federal income tax purposes under the Internal Revenue Code. As such, it will not be subject to any U.S. federal and state income taxes. In any year, it is possible that the LLC will not meet the qualifying income exception and will not qualify to be treated as a partnership. If the LLC does not meet the qualifying income exception, the members would then be treated as stockholders in a corporation and the company would become taxable as a corporation for U.S. federal income tax purposes under the Internal Revenue Code. The LLC would be required to pay income tax at corporate rates on its net taxable income. Distributions to members from the LLC would constitute dividend income taxable to such members, to the extent of the company's earnings and profits and the payment of the distributions would not be deductible by the LLC. The LLC plans to conduct substantially all its operations through its wholly-owned subsidiary, GREC, which is a corporation that is subject to U.S. federal, state and local income taxes. Accordingly, most of its operations will be subject to U.S. federal, state and local income taxes. Income taxes are accounted for under the assets and liabilities method. Deferred tax assets and liabilities are recorded for the estimated future tax consequences attributable to differences between items that are recognized in the consolidated financial statements and tax returns in different years. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. For income tax benefits to be recognized including uncertain tax benefits, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. The amount recognized is measured as the largest amount of the benefit that is more likely than not to be realized upon ultimate settlement. A valuation allowance is established against net deferred tax assets if, based on the weight of available evidence, it is more likely than not that some or all of the net deferred tax assets will not be realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. Interest and penalties associated with income taxes, if any, will be recognized in general and administrative expense. The company does not consolidate its investments for financial statements, rather it accounts for its investments at fair value under the specialized accounting of ASC Topic 946. The tax attributes of the individual investments will be considered and incorporated in the company's fair value estimates for those investments. The amounts recognized in the consolidated financial statements for unrealized appreciation and depreciation will result in a difference between the consolidated financial statements and the cost basis of the assets for tax purposes. These differences will be recognized as deferred tax assets and liabilities. Generally, the entities that hold the company's investments will be included in the consolidated tax return of GREC and the differences between the amounts recognized for financial statement purposes and the tax return will be recognized as additional deferred tax assets and liabilities. The company follows the authoritative guidance on accounting for uncertainty in income taxes and concluded it has no material uncertain tax positions to be recognized at this time. The company assessed its tax positions for all open tax years as of December 31, 2019 for all U.S. federal and state tax jurisdictions for the years 2015 through 2019. The results of this assessment are included in the company's tax provision and deferred tax assets as of December 31, 2019. Recently Issued Accounting Pronouncements In August 2018, the FASB issued ASU No. 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement", which modifies the disclosure requirements on fair value measurements. The new guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (fiscal 2020 for the company). Upon the effective date, certain provisions are to be applied prospectively, while others are to be applied retrospectively to all periods presented. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this ASU and delay adoption of the additional disclosures until their effective date. We are currently evaluating the impact of ASU 2018-03 on our consolidated financial statements and disclosures, but do not expect a material impact on our consolidated financial statements and disclosures.

Investments

Investments	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Investments	Note 3. Investments The composition of the company's investments as of December 31, 2019, at fair value, were as follows: Investments at Investments at Fair Value Biomass: Eagle Valley Biomass Portfolio $ 21,425,600 $ 21,425,600 4.5 % Subtotal $ 21,425,600 $ 21,425,600 4.5 % Commercial Solar: Conic Portfolio $ 12,077,823 $ 17,828,206 3.8 % East to West Solar Portfolio 39,109,190 41,214,191 8.7 Foresight Solar Portfolio 13,790,000 14,965,339 3.1 Golden Horizons Solar Portfolio 9,290,000 15,132,017 3.2 Green Maple Portfolio 26,561,596 27,268,058 5.7 Longleaf Portfolio 22,797,404 24,605,536 5.2 Magnolia Sun Portfolio 10,775,000 6,460,457 1.4 Midway III Solar Portfolio 10,575,394 11,475,652 2.4 Six States Solar Portfolio 12,655,306 12,799,005 2.6 Sunny Mountain Portfolio 884,578 743,768 0.2 Subtotal $ 158,516,291 $ 172,492,229 36.3 % Residential Solar: Canadian Northern Lights Portfolio $ 1,603,136 $ 1,611,955 0.3 % Greenbacker Residential Solar Portfolio 28,100,000 32,540,979 6.9 Greenbacker Residential Solar Portfolio II 6,400,000 13,279,521 2.8 Subtotal $ 36,103,136 $ 47,432,455 10.0 % Wind: Greenbacker Wind Portfolio – California $ 9,500,000 $ 8,777,056 1.8 % Greenbacker Wind Portfolio - HoldCo 25,753,111 35,089,021 7.4 Greenbacker Wind Portfolio - Iowa 20,440,000 20,440,000 4.3 Greenbacker Wind Portfolio - Massachusetts 10,169,079 10,902,726 2.3 Greenbacker Wind Portfolio - Montana 24,756,684 26,451,773 5.6 Subtotal $ 90,618,874 $ 101,660,576 21.4 % Pre-Operational Assets: Citrine Solar Portfolio $ 3,411,249 $ 3,411,249 0.7 % Colorado CES Portfolio 4,517,354 4,517,354 1.0 Electric City Portfolio 4,208,484 4,208,484 0.9 Omni Portfolio 17,900,298 17,900,298 3.8 Opal Portfolio 344,949 344,949 0.1 Oregon Sun Portfolio 5,404,787 5,404,787 1.1 Phoenix Solar Portfolio 4,051,138 4,051,138 0.8 SE Solar Portfolio 5,000,000 5,000,000 1.1 Trillium Portfolio 24,277,396 24,277,396 5.0 Turquoise Solar Portfolio 26,602,532 26,602,532 5.6 Subtotal $ 95,718,187 $ 95,718,187 20.1 % Other Investments: Other Portfolios $ 12,656,710 $ 12,473,975 2.6 % Subtotal $ 12,656,710 $ 12,473,975 2.6 % Energy Efficiency: GREC Energy Efficiency Portfolio $ 388,044 $ 390,019 0.1 % Renew AEC One, LLC 479,140 479,140 0.1 Subtotal $ 867,184 $ 869,159 0.2 % Secured Loans Encore Loan $ 5,000,680 $ 5,000,680 1.1 % Hudson Loan 9,481,127 9,481,127 2.0 New Market Loan 5,000,000 5,000,000 1.1 SE Solar Loan 1,000,000 1,000,000 0.2 TUUSSO Loan 2,621,883 2,621,883 0.5 Subtotal $ 23,103,690 $ 23,103,690 4.9 % Total $ 439,009,672 $ 475,175,871 100.0 % The composition of the company's investments as of December 31, 2018, at fair value, were as follows: Investments at Investments at Fair Value Commercial Solar: East to West Solar Portfolio $ 37,079,887 $ 33,665,088 10.9 % Foresight Solar Portfolio 13,650,000 14,357,201 4.7 Golden Horizons Solar Portfolio 9,400,000 14,445,071 4.7 Green Maple Portfolio 17,582,823 16,066,837 5.2 Magnolia Sun Portfolio 10,775,000 8,258,786 2.7 Midway III Solar Portfolio 11,552,904 13,265,608 4.3 Raleigh Portfolio 20,822,198 21,358,997 7.0 Six States Solar Portfolio 12,470,306 13,440,025 4.4 Sun Farm Portfolio 10,514,960 11,606,877 3.8 Sunny Mountain Portfolio 884,578 1,107,041 0.4 Subtotal $ 144,732,656 $ 147,571,531 48.1 % Residential Solar: Canadian Mountain Portfolio $ 1,603,136 $ 2,081,554 0.6 % Enfinity Colorado DHA Portfolio 1,400,000 1,700,728 0.6 Greenbacker Residential Solar Portfolio 28,100,000 27,372,253 8.9 Greenbacker Residential Solar Portfolio II 6,400,000 10,763,559 3.5 Subtotal $ 37,503,136 $ 41,918,094 13.6 % Wind: Greenbacker Wind Portfolio - California $ 9,500,000 $ 8,070,745 2.6 % Greenbacker Wind Portfolio - Idaho 7,320,000 6,385,631 2.1 Greenbacker Wind Portfolio - Montana 21,709,487 21,956,868 7.1 Greenbacker Wind Portfolio - Vermont 24,917,193 28,752,500 9.4 Subtotal $ 63,446,680 $ 65,165,744 21.2 % Pre-Operational Assets: Colorado CSG Solar Portfolio $ 27,333,205 $ 27,215,170 8.9 % Phoenix Solar Portfolio 9,964,515 9,964,515 3.2 SE Solar Portfolio 7,178,207 7,178,207 2.3 Turquoise Solar Portfolio 5,877,188 5,877,188 1.9 Subtotal $ 50,353,115 $ 50,235,080 16.3 % Other Investments: $ 1,279,273 $ 1,263,620 0.4 % Energy Efficiency: GREC Energy Efficiency Portfolio $ 447,885 $ 470,406 0.2 % Renew AEC One, LLC 551,640 551,640 0.2 Subtotal $ 999,525 $ 1,022,046 0.4 % Total $ 298,314,385 $ 307,176,115 100.0 % The counterparty to all the energy efficiency investments held by the company as of December 31, 2019 and December 31, 2018 is a related party (See Note 5). Investments at Investments at Fair Value United States: East Region $ 123,146,232 $ 130,572,650 27.4 % Mid-West Region 49,208,021 55,455,982 11.7 % Mountain Region 79,975,330 87,711,362 18.5 % South Region 91,932,394 93,441,062 19.7 % West Region 92,944,559 106,382,860 22.4 % Total United States: $ 437,406,536 $ 473,563,916 99.7 % Canada: 1,603,136 1,611,955 0.3 % Total $ 439,009,672 $ 475,175,871 100.0 % The composition of the company's investments as of December 31, 2018 by geographic region, at fair value, were as follows: Investments at Investments at Fair Value United States: East Region $ 65,082,005 $ 67,541,264 22.0 % Mid-West Region 1,796,801 1,846,346 0.6 Mountain Region 69,619,383 69,553,178 22.6 South Region 98,476,770 95,332,608 31.0 West Region 61,736,290 70,821,165 23.1 Total United States $ 296,711,249 $ 305,094,561 99.3 % Canada: 1,603,136 2,081,554 0.7 Total $ 298,314,385 $ 307,176,115 100.0 % The composition of the company's investments as of December 31, 2019 by industry, at fair value, were as follows: Investments at Investments at Fair Value Biomass $ 21,425,600 $ 21,425,600 4.5 % Commercial Solar* 181,619,981 195,595,919 41.2 Residential Solar 36,103,136 47,432,455 10.0 Wind 90,618,874 101,660,576 21.4 Pre-Operational Assets 95,718,187 95,718,187 20.1 Other Investments 12,656,710 12,473,975 2.6 Energy Efficiency 867,184 869,159 0.2 Total $ 439,009,672 $ 475,175,871 100.0 % * Includes loans in the amount of $23,103,690. The composition of the company's investments as of December 31, 2018 by industry, at fair value, were as follows: Investments at Investments at Fair Value Commercial Solar $ 144,732,656 $ 147,571,531 48.1 % Residential Solar 37,503,136 41,918,094 13.6 Wind 63,446,680 65,165,744 21.2 Pre-Operational Assets 50,353,115 50,235,080 16.3 Other Investments 1,279,273 1,263,620 0.4 Energy Efficiency 999,525 1,022,046 0.4 Total $ 298,314,385 $ 307,176,115 100.0 % Investments held as of December 31, 2019 and 2018 are considered Control Investments, which are defined as investments in companies in which the company owns 25% or more of the voting securities of such company, have greater than 50% representation on such company's board of directors, or investments in limited liability companies for which the company serves managing member.

Fair Value Measurements - Inves

Fair Value Measurements - Investments	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements - Investments	Note 4. Fair Value Measurements — Investments The following table presents fair value measurements of investments, by major class, as of December 31, 2019 according to the fair value hierarchy: Valuation Inputs Level 1 Level 2 Level 3 Fair Value Limited Liability Company Member Interests $ - $ - $ 449,981,086 $ 449,981,086 Capital Stock - - 1,611,955 1,611,955 Energy Efficiency Secured Loans - - 479,140 479,140 Secured Loans – Other - - 23,103,690 23,103,690 Total $ - $ - $ 475,175,871 $ 475,175,871 Other Financial Instruments* Open swap contracts- assets $ - $ 21,223 $ - $ 21,223 Open swap contracts- liabilities - (4,899,566 ) - (4,899,566 ) Total $ - $ (4,878,343 ) $ - $ (4,878,343 ) * Other financial instruments are derivatives, such as futures, forward currency contracts and swaps. These instruments are reflected at the unrealized appreciation (depreciation) on the instrument. The following table presents fair value measurements of investments, by major class, as of December 31, 2018 according to the fair value hierarchy: Valuation Inputs Level 1 Level 2 Level 3 Fair Value Limited Liability Company Member Interests $ — $ — $ 304,542,921 $ 304,542,921 Capital Stock — — 2,081,554 2,081,554 Energy Efficiency Secured Loans — — 551,640 551,640 Total $ — $ — $ 307,176,115 $ 307,176,115 Other Financial Instruments* Open swap contracts- assets $ — $ 435,603 $ — $ 435,603 Open swap contracts- liabilities $ — $ (311,641 ) $ — $ (311,641 ) Total $ — $ 123,962 $ — $ 123,962 * Other financial instruments are derivatives, such as futures, forward currency contracts and swaps. These instruments are reflected at the unrealized appreciation (depreciation) on the instrument. The following table provides a reconciliation of the beginning and ending balances for investments that use Level 3 inputs for the year ended December 31, 2019: Balance Net change Translation Purchases Cost Sales and Net realized Balance Limited Liability Company Member Interests $ 304,542,921 $ 27,774,068 $ - $ 314,175,394 $ (159,495,169 ) $ (49,931,866 ) $ 12,915,738 $ 449,981,086 Capital Stock 2,081,554 (477,188 ) 7,589 - - - - 1,611,955 Energy Efficiency - Secured Loans 551,640 - - - - (72,500 ) - 479,140 Secured Loans - Other - - - 39,410,466 (2,056,776 ) (14,250,000 ) - 23,103,690 Total $ 307,176,115 $ 27,296,880 $ 7,589 $ 353,585,860 $ (161,551,945 ) $ (64,254,366 ) $ 12,915,738 $ 475,175,871 (1) Includes paid-in-kind interest, return of capital and additional investments in existing investments, if any. (2) Includes principal repayments on loans. The total change in unrealized appreciation included in the consolidated statements of operations within net change in unrealized appreciation on investments and foreign currency translation for the year ended December 31, 2019 attributable to Level 3 investments still held at December 31, 2019 was $27,304,469. Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in or out of the Level 3 as of the beginning of the period which the reclassifications occur. There were no reclassifications attributable to Level 3 investments during the year ended December 31, 2019. The total net change in unrealized appreciation at fair value for the year ended December 31, 2019 was $22,302,164. The following table provides a reconciliation of the beginning and ending balances for investments that use Level 3 inputs for the year ended December 31, 2018: Balance Net change in unrealized appreciation on investments Translation of assets and liabilities denominated in foreign currencies Purchases Cost adjustments (1) Sales and Repayments of investments (2) Net realized gain on investments Balance Limited Liability Company Member Interests $ 215,619,476 $ 2,848,856 $ - $ 135,141,381 $ (44,566,792 ) $ (4,500,000 ) $ - $ 304,542,921 Capital Stock 2,093,827 106,223 (118,496 ) - - - - 2,081,554 Energy Efficiency - Secured Loans 672,871 - - - - (121,231 ) - 551,640 Total $ 218,386,174 $ 2,955,079 $ (118,496 ) $ 135,141,381 $ (44,566,792 ) $ (4,621,231 ) $ - $ 307,176,115 (1) Includes paid-in-kind interest, return of capital and additional investments in existing investments, if any. (2) Includes principal repayments on loans. The total change in unrealized appreciation included in the consolidated statements of operations within net change in unrealized appreciation on investments and foreign currency translation for the year ended December 31, 2018 attributable to Level 3 investments still held at December 31, 2018 was $2,836,583. Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in or out of the Level 3 as of the beginning of the period which the reclassifications occur. There were no reclassifications attributable to Level 3 investments during the year ended December 31, 2018. The total net change in unrealized appreciation at fair value for the year ended 31, 2018 was $2,804,477. The following table provides a reconciliation of the beginning and ending balances for investments that use Level 3 inputs for the year ended December 31, 2017: Balance as of December 31, Net change in unrealized appreciation on investments Translation of assets and liabilities denominated in foreign currencies Purchases Cost adjustments (1) Sales and Repayments of investments (2) Net realized gain on investments Balance as of December 31, Limited Liability Company Member Interests $ 112,536,561 $ 5,748,138 $ - $ 127,069,013 $ (30,412 ) $ (30,397,706 ) $ 693,882 $ 215,619,476 Capital Stock 1,815,169 180,895 97,763 - - - - 2,093,827 Energy Efficiency - Secured Loans 771,371 - - - - (98,500 ) - 672,871 Total $ 115,123,101 $ 5,929,033 $ 97,763 $ 127,069,013 $ (30,412 ) $ (30,496,206 ) $ 693,882 $ 218,386,174 (1) Includes purchases of new investments, capitalized deal costs, effects of purchase price adjustments, paid-in-kind interest, return of capital and additional investments in existing investments, if any. (2) Includes principal repayments on loans. The total change in unrealized appreciation included in the consolidated statements of operations within net change in unrealized appreciation on investments and foreign currency translation for the year ended December 31, 2017 attributable to Level 3 investments still held at December 31, 2017 was $6,026,796. Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in or out of the Level 3 as of the beginning of the period which the reclassifications occur. There were no reclassifications attributable to Level 3 investments during the year ended December 31, 2017. The total net change in unrealized appreciation at fair value for the year ended 31, 2017 was $6,092,167. As of December 31, 2019, all of the company's portfolio investments utilized Level 3 inputs. The following table presents the quantitative information about Level 3 fair value measurements of the company's investments as of December 31, 2019: Fair Value Valuation Techniques Unobservable Inputs Rates/Assumptions Biomass $ 21,425,600 Transaction Cost Not Applicable Not Applicable Commercial Solar $ 172,492,229 Income Approach and Market Approach Discount rate, future kWh Production, and estimated remaining useful life 7.25% - 9.25%, 0.50% annual degradation in production, 13.5 - 34.3 years Residential Solar $ 47,432,455 Income Approach and Market Approach Discount rate, future kWh Production, and estimated remaining useful life 7.25% - 9.25%, 0.50% annual degradation in production, 13.5 - 34.3 years Wind $ 101,660,576 Income Approach Discount rate, future kWh Production, and estimated remaining useful life 8.50%, no annual degradation in production, 27.9 - 29.0 years Pre-Operational Assets $ 95,718,187 Transaction Cost Not Applicable Not Applicable Other Investments $ 12,473,975 Transaction Cost Not Applicable Not Applicable Energy Efficiency $ 869,159 Income and Collateral Based Approach Income Based Market yields 10.25% - 20.40% Secured Loans $ 23,103,690 Yield Analysis Market yields 8% - 10% As of December 31, 2018, all of the company's portfolio investments utilized Level 3 inputs. The following table presents the quantitative information about Level 3 fair value measurements of the company's investments as of December 31, 2018: Fair Value Valuation Techniques Unobservable Inputs Rates/Assumptions Commercial Solar $ 147,571,531 Income approach Discount rate, future kWh Production, and estimated remaining useful life 7.75% - 8.50%, 0.50% annual degradation in production, 22.2 - 35 years Residential Solar $ 41,918,094 Income approach Discount rate, future kWh Production, and estimated remaining useful life 7.25% - 11%, 0.50% annual degradation in production, 12.2 - 33 years Wind $ 65,165,744 Income approach Discount rate, future kWh Production, and estimated remaining useful life 8.50%, no annual degradation in production, 24 - 27.7 years Pre-Operational Assets $ 50,235,080 Transaction cost Not Applicable Not Applicable Other Investments $ 1,263,620 Transaction cost Not Applicable Not Applicable Energy Efficiency $ 1,022,046 Income and collateral based approach Income Based 10.25% - 20.40% GREC utilizes primarily proprietary discounted cash flow pricing models in the fair value measurement of the company's investments. Significant unobservable inputs include discount rates and estimates related to the future production of electricity. Significant increases or decreases in discount rates used or actual kilowatt hour production can significantly increase or decrease the fair value measurement

Related Party Agreements and Tr

Related Party Agreements and Transactions Agreements	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Agreements and Transactions Agreements	Note 5. Related Party Agreements and Transactions Agreements The company has executed advisory and administration agreements with the advisor and Greenbacker Administration, LLC, our administrator, respectively, which entitles the advisor, and certain affiliates of the advisor, to specified fees upon the provision of certain services with regard to the ongoing management of the company as well as reimbursement of O&O costs incurred by the advisor on behalf of the company (as discussed in Note 2) and certain other operating costs incurred by the advisor on behalf of the company. As the company's continuous public offering was terminated on March 29, 2019, the dealer manager will no longer receive any selling commission or dealer manager fees. However, the dealer manager will continue to receive distribution fess on Class C shares until the maximum amount of commissions and dealer manager fees permitted by applicable regulation is reached. The term "Special Unitholder" refers to GREC Advisors, LLC, a Delaware limited liability company, which is a subsidiary of our advisor and "special unit", refers to the special unit of limited liability company interest in GREC. This entitles the Special Unitholder to an incentive allocation and distribution. The commissions, fees and reimbursement obligations related to our terminated continuous offering were as follows: Type of Compensation and Recipient Determination of Amount Selling Commissions — Dealer Manager Up to 7% of gross offering proceeds from the sale of Class A shares, up to 3% of gross offering proceeds from the sale of Class C shares and up to 6% of gross offering proceeds for the sale of Class P-A shares. No selling commission will be paid with respect to Class I and Class P-I shares or for sales pursuant to the dividend reinvestment plan. All its selling commissions were re-allowed to participating broker-dealers. Dealer Manager Fee — Dealer Manager Up to 2.75% of gross offering proceeds from the sale of Class A and C shares, and up to 1.75% of gross offering proceeds from the sale of Class I shares. No dealer manager fee will be paid for sales pursuant to the dividend reinvestment plan. The dealer manager re-allowed a portion of its dealer manager fee to selected broker-dealers during the offering. Distribution Fee — Dealer Manager With respect to Class C shares only, the company will pay the dealer manager a distribution fee that accrues daily in an amount equal to 1/365th of 0.80% of the amount of the net asset value for the Class C shares for such day on a continuous basis from year to year. The company will stop paying distribution fees at the earlier of 1) a listing of the Class C shares on a national securities exchange, 2) following the completion of this offering, total underwriting compensation in this offering equals 10% of the gross proceeds from the primary offering of Class C shares or 3) Class C shares are no longer outstanding. The dealer manager may re-allow all or a portion of the distribution fee to participating broker-dealers and servicing broker dealers. Commencing as of June 30, 2016, the company estimates the amount of distribution fees expected to be paid and records that liability at the time of sale. O&O costs — Advisor The company reimburses the advisor for the O&O costs (other than selling commissions and dealer manager fees) it has incurred on the company's behalf only to the extent that the reimbursement would not cause the selling commissions, dealer manager fee and the other O&O costs borne by the company to exceed 15.0% of the gross offering proceeds as the amount of proceeds increases. From the commencement of the continuous offering through December 31, 2019, approximately 3.8%, or $9.4 million, was charged against gross offering proceeds for O&O costs. The fees and reimbursement obligations related to our ongoing operation of the company are as follows: Type of Compensation and Recipient Determination of Amount Base Management Fees — Advisor The base management fee payable to GCM will be calculated at a monthly rate of 0.167% (2.00% annually) of our gross assets (including amounts borrowed). For services rendered under the advisory agreement, the base management fee will be payable monthly in arrears. The base management fee will be calculated based on the average of the values of our gross assets for each day of the prior month. Base management fees for any partial period will be appropriately pro-rated. The base management fee may be deferred or waived, in whole or part, at the election of the advisor. All or any part of the deferred base management fee not taken as to any period shall be deferred without interest and may be taken in any period prior to the occurrence of a liquidity event as the advisor shall determine in its sole discretion. Type of Compensation and Recipient Determination of Amount Incentive Allocation and Distribution — Special Unitholder The incentive distribution to which the Special Unitholder is be entitled to will be calculated and payable quarterly in arrears based on the pre-incentive distribution net investment income for the immediately preceding fiscal quarter. For this purpose, pre-incentive distribution net investment income means interest income, dividend and distribution income from equity investments (excluding that portion of distributions that are treated as return of capital) and any other income (including any other fees, such as commitment, origination, structuring, diligence and consulting fees or other fees that we receive, but excluding any fees for providing managerial assistance) accrued during the fiscal quarter, minus the operating expenses for the fiscal quarter (including the base management fee, expenses payable under the administration agreement with the company's Administrator, and any interest expense and distributions paid on any issued and outstanding indebtedness and preferred units of limited liability company interest, but excluding the incentive distribution). Pre-incentive distribution net investment income does not include any realized capital gains, realized capital losses, unrealized capital appreciation or depreciation or any accrued income taxes and other taxes including, but not limited to, franchise, property, and sales taxes. Pre-incentive distribution net investment income, expressed as a rate of return on the value of the company's average adjusted capital at the end of the immediately preceding fiscal quarter, will be compared to a "hurdle rate" of 1.75% per fiscal quarter (7.00% annualized). Adjusted capital shall mean: cumulative gross proceeds before sales and commission and dealer fees, generated from sales of the company's shares and preferred units of limited liability company interests (including the DRP) reduced for distributions to members of proceeds from non-liquidation dispositions of asset and amount paid for share repurchases pursuant to the Share Repurchase Program. Average adjusted capital shall mean: the average value of the adjusted capital for the two most recently completed fiscal quarters. The Special Unitholder shall receive an incentive distribution with respect to the pre-incentive distribution net investment income in each fiscal quarter as follows: ● no incentive distribution in any fiscal quarter in which the pre-incentive distribution net investment income does not exceed the "hurdle rate" of 1.75%; ● 100% of the pre-incentive distribution net investment income with respect to that portion of such pre-incentive distribution net investment income, if any, that exceeds the hurdle but is less than 2.1875% in any fiscal quarter (8.75% annualized with a 7% annualized hurdle rate). The company refers to this portion of the pre-incentive distribution net investment income (which exceeds the hurdle but is less than 2.1875%) as the "catch-up." The "catch-up" is meant to provide the advisor with 20% of the pre-incentive distribution net investment income as if a hurdle did not apply if the net investment income exceeds 2.1875% in any fiscal quarter; and Type of Compensation and Recipient Determination of Amount ● 20% of the amount of the pre-incentive distribution net investment income, if any, that exceeds 2.1875% in any fiscal quarter (8.75% annualized with a 7% annualized hurdle rate) is payable to the Special Unitholder (once the hurdle is reached and the catch-up is achieved, 20% of all pre-incentive distribution investment income thereafter is allocated to the Special Unitholder). Capital Gains Incentive Distribution — Special Unitholder The capital gains incentive distribution will be determined and payable to the Special Unitholder in arrears as of the end of each fiscal quarter (or upon termination of the advisory agreement, as of the termination date) to the Special Unitholder, and will equal 20.0% of the company's realized capital gains, if any, on a cumulative basis from inception through the end of each fiscal quarter, computed net of all realized capital losses and unrealized capital depreciation on a cumulative basis, less the aggregate amount of any capital gain incentive distributions. Liquidation Incentive Distribution — Special Unitholder The liquidation incentive distribution payable to the Special Unitholder will equal 20.0% of the net proceeds from a liquidation of the company (other than in connection with a listing, as described below) in excess of adjusted capital, as measured immediately prior to liquidation. Adjusted capital shall mean: cumulative gross proceeds generated from sales of shares (including the DRP) reduced for distributions to members of proceeds from non-liquidation dispositions of our assets and amounts paid for share repurchases pursuant to the Share Repurchase Program. In the event of any liquidity event that involves a listing of the company's shares, or a transaction in which the company's members receive shares of a company that is listed, on a national securities exchange, the liquidation incentive distribution will equal 20% of the amount, if any, by which the company's listing value following such liquidity event exceeds the adjusted capital, as calculated immediately prior to such listing (the "listing premium"). Any such listing premium and related liquidation incentive distribution will be determined and payable in arrears 30 days after the commencement of trading following such liquidity event. For the years ended December 31, 2019, 2018 and 2017, the advisor earned $8,461,616, $5,803,893 and $3,490,942, respectively, in management fees. The Consolidated Statements of Operations also reflect a $5,270,670 incentive allocation for the year ended December 31, 2019 shown as a net increase in net assets attributed to special unitholder. There was a capital gains incentive distribution of $170,000, nil, and $139,692 earned in 2019, 2018 and 2017, respectively. The Consolidated Statements of Operation also reflect a $560,895 and $1,235,657 incentive allocation shown as a net increase in net assets attributed to special unitholder for the years ended December 31, 2018 and December 31, 2017, respectively. As of December 31, 2019, no amounts were due to the advisor. As of December 31, 2018, due to advisor on the consolidated statements of assets and liabilities in the amount of $19,181 is solely comprised of a payable to the advisor for reimbursable Organization and Offering Costs. For the years ended December 31, 2019, 2018 and 2017, the company paid $231,892, $833,043 and $827,709, respectively, in dealer manager fees and $594,247, $2,438,486 and $2,444,282, respectively, in selling commissions to the company's dealer manager, SC Distributors. These fees and commissions were paid in connection with the sales of the company's shares to investors and, as such, were recorded against the proceeds from the issuance of shares, prior the receipt by the company, and thus are not reflected in the company's consolidated statements of operations. For the years ended December 31, 2019, 2018 and 2017, Greenbacker Administration, LLC invoiced the company nil, nil and $115,849, respectively, for expenses, at cost, for services related to asset management, compliance and accounting services related to the company's investments. Effective on April 1, 2017, these expenses were invoiced directly to the company's investments. As of December 31, 2019, and 2018, respectively, the advisor owned 23,601 Class A shares. The affiliate of our advisor redeemed all its shares during the year ended December 31, 2018 and no longer owns shares as of December 31, 2018. The company entered into secured loans to finance the purchase and installation of energy efficient lighting with LED Funding LLC and Renew AEC One LLC ("AEC Companies"). All of the loans with LED Funding LLC, an AEC Company, converted to an operating lease on the day the energy efficiency upgrades became operational. AEC Companies are considered related parties as the members of these entities own an indirect, non-controlling ownership interest in the company's advisor. The loans outstanding between the AEC Companies and the company, and the subsequent operating leases, were negotiated at an arm's length and contain standard terms and conditions that would be included in third party lending agreements including required security and collateral, interest rates based upon risk of the specific loan, and term of the loan. As of December 31, 2019, all loans and operating leases are considered current per their terms. The company entered into a transaction with Greenbacker Renewable Opportunity Zone Fund LLC ("GROZ") to sell the Sol Phoenix Solar LLC investment, included within the Phoenix Solar Portfolio, on September 30, 2019 for $16,874,761, which was later amended to total $17,175,554 as of December 31, 2019. GROZ is an affiliate of GREC, as the fund shares the same advisor as GREC. Since GROZ is an affiliate of the company, the determination of the purchase price was based on the fair value of the investment as determined by an independent third-party appraiser and the purchase was determined by a majority of the company board of directors (including a majority of the independent directors) not otherwise interested in the transaction to be fair and reasonable to the company On December 10, 2019 the company through its wholly owned subsidiary, Citrine Solar LLC, entered into a second transaction with GROZ to sell the Fremont CO I, LLC asset. The asset was sold for a purchase price of $5,272,475, based upon the fair value of the investment as determined by an independent third-party appraiser. The transaction resulted in a realized gain of $794,475 recorded in the Consolidated Statement of Operations. As of December 31, 2019, the remaining balance of $2,741,476 is included in Investment Sales Receivable in the Consolidated Statements of Assets and Liabilities.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Borrowings	Note 6. Borrowings On June 20, 2019, the company, through GREC HoldCo, entered into a new credit agreement, the lenders party thereto and Fifth Third Bank, as administrative agent, as sole lead arranger, sole lead bookrunner, and as swap counterparty. The new credit facility (the "New Credit Facility") consists of a loan of up to the lesser of $110,000,000 or a borrowing base amount based on various solar projects that act as collateral for the credit facility, of which approximately $58,307,080 was drawn down at closing. The $110,000,000 borrowing base has since been reduced to $96,438,316 as a result of our sale of the Raleigh Portfolio and its removal from the facility. The New Credit Facility allows for additional drawdowns through June 20, 2020, at which point the outstanding loans shall convert to an additional term loan and mature on June 20, 2025. As of December 2019, the company has drawn down an additional $13,683,387 increasing the total amount drawn on the credit facility. The company will use the net proceeds of borrowings under the New Credit Facility for investment in additional alternative energy power generation assets that are anticipated to become Projects and for other general corporate purposes. Loans made under the New Credit Facility bear interest at 1.75% in excess of the three-month LIBOR. Until the New Credit Facility converts to a term loan, quarterly commitment fees on the average daily unused portion of the Credit Facility are payable at a rate per annum of 0.50%. Borrowings under the New Credit Facility are back-leveraged and secured by all of the assets of GREC HoldCo and the equity interests of each direct and indirect subsidiary of the company. The company, GREC and each direct and indirect subsidiary of the company are guarantors of the company's obligations under the New Credit Facility. GREC has pledged all the equity interests of the GREC HoldCo as collateral for the New Credit Facility. As of December 31, 2019, the outstanding balance is approximately $72 million. Financing costs of $3.1 million related to the New Credit Facility have been capitalized and are being amortized over the current term of the New Credit Facility. On January 5, 2018, the company, through GREC HoldCo, entered into a credit agreement by and among the company, the company's wholly owned subsidiary, GREC, the lenders party thereto and Fifth Third Bank, as administrative agent, as sole lead arranger, sole lead bookrunner, and as swap counterparty. The credit facility (the "Credit Facility") consisted of a loan of up to the lesser of $60,000,000 or a borrowing base amount based on various solar projects that act as collateral for the credit facility, of which approximately $25.7 million was drawn down at closing. The Credit Facility allowed for additional drawdowns through December 31, 2018 and converted to a term loan with a maturity on January 5, 2024. The New Credit Facility replaced the previous Credit Facility. Regarding the Credit Facility, the company has entered into five separate interest rate swap agreements. The first swap ("Swap 1"), effective July 29, 2016, has an initial notional amount of $4,300,000 to swap the floating rate interest payments on the original Facility 1 Term Loan for a corresponding fixed payment. The fixed swap rate is 1.11%. The second swap ("Swap 2"), with a trade date of June 15, 2017 and an effective date of June 18, 2018 and an initial notional amount of $20,920,650, was used to swap the floating rate interest payments on an additional principal amount of the Credit Facility, for a corresponding fixed payment. The fixed swap rate is 2.261%. The third swap ("Swap 3"), with a trade date of January 11, 2018 and an effective date of December 31, 2018 and an initial notional amount of $29,624,945 was used to swap the floating rate interest payments on the remaining unhedged portion of the Credit Facility, as well as the estimated additional drawdowns, for a corresponding fixed payment. The fixed swap rate is 2.65%. The fourth swap ("Swap 4"), with a trade date of February 7, 2018 and an effective date of December 31, 2018 and an initial notional amount of $4,180,063 was used to swap the floating rate interest payments on the remaining unhedged portion of the Credit Facility, as well as the estimated additional drawdowns, for a corresponding fixed payment. The fixed swap rate is 2.97%. The fifth swap ("Swap 5"), with a trade date of January 2, 2019 and an effective date of September 30, 2019 and an initial notional amount of $38,203,506 was used to swap the floating rate interest payments on the remaining unhedged portion of the Credit Facility, as well as the estimated additional drawdowns, for a corresponding fixed payment. The fixed swap rate is 2.69%. If an event of default shall occur and be continuing under the New Credit Facility, the commitments under the New Credit Facility may be terminated and the principal amount outstanding under the New Credit Facility, together with all accrued unpaid interest and other amounts owing in respect thereof, may be declared immediately due and payable. If an event of default shall occur and be continuing under the New Credit Facility, the commitments under the New Credit Facility may be terminated and the principal amount outstanding under the New Credit Facility, together with all accrued unpaid interest and other amounts owing in respect thereof, may be declared immediately due and payable. The company's outstanding debt as of December 31, 2019 and December 31, 2018 was as follows: December 31, 2019 December 31, 2018 Aggregate Principal Amount Available Principal Amount Outstanding Carrying Value Deferred Financing Costs Term Note Payable, Net of Financing Costs Aggregate Principal Amount Available Principal Amount Outstanding Carrying Value Deferred Financing Costs Term Note Payable, Net of Financing Costs New Facility $ 96,438,316 $ 71,990,467 $ 71,990,467 $ 3,103,681 $ 68,886,785 $ 60,000,000 $ 30,665,460 $ 30,665,460 $ 1,138,414 $ 29,527,046 Total $ 96,438,316 $ 71,990,467 $ 71,990,467 $ 3,103,681 $ 68,886,785 $ 60,000,000 $ 30,665,460 $ 30,665,460 $ 1,138,414 $ 29,527,046 The following table shows the components of interest expense, commitment fees related to the Credit Facility, amortized deferred financing costs, weighted average stated interest rate and weighted average outstanding debt balance for the credit facility for the year ended December 31, 2019: For the year Ended December 31, Credit Facility commitment fee $ 43,087 Credit Facility Loan interest 1,360,409 Amortization of deferred financing costs 226,742 Other* 1,182,564 Total $ 2,812,802 Weighted average interest rate on credit facility 4.32 % Weighted average outstanding balance of credit facility $ 53,753,277 * Primarily includes financing costs of credit facility. The following table shows the components of interest expense, commitment fees related to the Credit Facility, amortized deferred financing costs, weighted average stated interest rate and weighted average outstanding debt balance for the credit facility for the year ended December 31, 2018: For the year Ended Credit Facility commitment fee $ 42,615 Credit Facility Loan interest 1,219,237 Amortization of deferred financing costs 222,394 Other* 309,588 Total $ 1,793,834 Weighted average interest rate on credit facility 4.14 % Weighted average outstanding balance of credit facility $ 29,896,416 * Primarily includes financing costs of credit facility. The following table shows the components of interest expense, commitment fees related to the Revolving Facility, amortized deferred financing costs, weighted average stated interest rate and weighted average outstanding debt balance for the credit facility for the year ended December 31, 2017: For the year Ended Revolver interest $ 288,620 Revolver commitment fee 81,109 Credit Facility Loan interest 157,811 Amortization of deferred financing costs 164,725 Total 692,265 Weighted average interest rate on credit facility. 4.87 % Weighted average outstanding balance of credit facility $ 8,481,848 The principal payments due on borrowings for each of the next five years ending December 31 and thereafter, are as follows: Year ending December 31: Principal 2020 $ 4,393,296 2021 5,659,278 2022 5,549,332 2023 5,630,052 2024 5,805,094 Thereafter 44,953,415 $ 71,990,467

Members' Equity

Members' Equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Members' Equity	Note 7. Members' Equity General Pursuant to the terms of the LLC Agreement, the LLC may issue up to 400,000,000 shares, of which 350,000,000 shares are designated as Class A, C, I, P-A and P-I shares (collectively, common shares), and 50,000,000 are designated as preferred shares and one special unit. Each class of common shares will have the same voting rights. The following were the commissions and fees for each common share class in connection with the company's continuous public offering pursuant to a Registration Statement on Form S-1 (File No. 333-211571) which terminated on March 29, 2019 as well as the private offering of Class P-A. Class A: Each Class A share were subject to a selling commission of up to 7.00% per share and a dealer manager fee of up to 2.75% per share. No selling commissions or dealer manager fees are paid for sales pursuant to the DRP. Class C: Each Class C share issued in the primary offering was subject to a selling commission of up to 3.00% per share and a dealer manager fee of up to 2.75% per share. In addition, with respect to Class C shares, the company pays the dealer manager a monthly distribution fee, or "distribution fee", that accrues daily equal to 1/365th of 0.80% of the amount of the daily net asset value for the Class C shares on a continuous basis from year to year. No selling commissions or dealer manager fees are paid for sales pursuant to the DRP. Class I: No selling commission or distribution fee will be paid for sales of any Class I shares. Each Class I share was subject to a dealer manager fee of up to 1.75% per share. No selling commissions or dealer manager fees are paid for sales pursuant to the DRP for Class I shares. Class P-A: Class P-A shares were converted into Class P-I shares during the quarter ended June 30, 2017 and were not offered for sale for the period through April 15, 2018. Effective April 16, 2018, Class P-A shares were again offered with a selling commission of up to 6% and a dealer manager fee of up to 2.50%. The Class P-A shares are no longer offered for sale. Class P-I shares are currently offered at net asset value through a private placement memorandum. The following table is a summary of the shares issued and repurchased during the period and outstanding as of December 31, 2019: Shares Outstanding as of Shares Issued During the Period Shares Repurchased During the Period Shares Outstanding as of Class A shares 16,714,738 1,053,857 (558,579 ) 17,210,016 Class C shares 2,222,478 512,926 (16,929 ) 2,718,475 Class I shares 6,209,416 670,113 (185,871 ) 6,693,658 Class P-A shares 15,478 2,631 - 18,109 Class P-I shares 11,841,392 9,631,641 (223,681 ) 21,249,352 Total 37,003,502 11,871,168 (985,060 ) 47,889,610 The following table is a summary of the shares issued and repurchased during the period and outstanding as of December 31, 2018: Shares Outstanding as of Shares Issued During the Period Shares Repurchased During the Period Shares Outstanding as of Class A shares 13,857,830 3,279,887 (422,979 ) 16,714,738 Class C shares 1,431,999 798,080 (7,601 ) 2,222,478 Class I shares 4,511,832 1,757,365 (59,781 ) 6,209,416 Class P-A shares — 15,478 — 15,478 Class P-I shares 3,387,568 8,469,305 (15,481 ) 11,841,392 Total 23,189,229 14,320,115 (505,842 ) 37,003,502 The proceeds from shares sold and the value of shares issued through the reinvestment of distributions for each class of shares for the years ended December 31, 2019, 2018, 2017 were as follows: Class A Class C Class I Class P-A Class P-I Total For the year ended December 31, 2019 Proceeds from Shares Sold $ 5,256,053 $ 3,651,717 $ 3,773,270 $ 22,875 $ 84,637,482 $ 97,341,397 Proceeds from Shares Issued through Reinvestment of Distributions $ 3,944,111 $ 733,788 $ 2,074,778 $ - $ - $ 6,752,677 For the year ended December 31, 2018 Proceeds from Shares Sold $ 25,178,267 $ 6,378,209 $ 13,706,626 $ 135,375 $ 74,928,595 $ 120,327,072 Proceeds from Shares Issued through Reinvestment of Distributions $ 3,815,909 $ 487,570 $ 1,823,310 $ - $ - $ 6,126,789 For the year ended December 31, 2017 Proceeds from Shares Sold $ 26,852,433 $ 3,102,082 $ 15,071,499 $ 27,075 $ 27,366,718 $ 72,419,807 Proceeds from Shares Issued through Reinvestment of Distributions $ 3,127,873 $ 363,670 $ 1,255,991 $ - $ - $ 4,747,534 As of December 31, 2019, 2018 and 2017, none of the LLC's preferred shares were issued and outstanding. The LLC Agreement authorizes the board of directors, without approval of any of the members, to increase the number of shares the company is authorized to issue and to classify and reclassify any authorized but unissued class or series of shares into any other class or series of shares having such designations, preferences, right, power and duties as may be specified by the board of directors. The LLC Agreement also authorizes the board of directors, without approval of any of the members, to issue additional shares of any class or series for the consideration and on the terms and conditions established by the board of directors. In addition, the company may also issue additional limited liability company interests that have designations, preferences, right, powers and duties that are different from, and may be senior to, those applicable to the common shares. The Special Unitholder will hold the special unit in the company. Refer to Note 5 for the terms of the special unit. The proceeds related to the shareholder receivable amount of $650,000 presented on the consolidated statements of assets and liabilities as of December 31, 2019 were subsequently collected on January 2, 2020. Distribution Reinvestment Plan The company adopted a DRP through which the company's Class A, C and I shareholders may elect to purchase additional shares with distributions from the company rather than receiving the cash distributions. The board of directors may reallocate the shares between the public offering and the DRP. Shares issued pursuant to the DRP will have the same voting rights as shares offered pursuant to the public offering. As of June 4, 2019, pursuant to our Registration Statement on Form S-3 (File No. 333-231960) we are offering a maximum of $10,000,000 in shares of our common stock to our existing stockholders pursuant to the DRP. Management plans to increase the size of the offering once the maximum offering amount is reached. During this offering, the purchase price of shares purchased through the DRP will be at a price equal to the then current net offering price per share. No dealer manager fees, selling commissions or other sales charges will be paid with respect to shares purchased pursuant to the DRP except for distribution fees on Class C shares issued under the DRP. At its discretion, the board of directors may amend, suspend, or terminate the DRP. A participant may terminate participation in the DRP by written notice to the plan administrator, received by the plan administrator at least 10 days prior to the distribution payment date. As of December 31, 2019, the company issued 1,588,435 Class A shares, 220,991 Class C shares, and 678,445 Class I shares for a total of 2,487,871 shares issued under the DRP. As of December 31, 2018, the company issued 1,131,099 Class A shares, 134,021 Class C shares, and 438,254 Class I shares, for a total of 1,703,374 shares issued under the DRP. Share Repurchase Program During 2015, the company commenced a share repurchase program, or "share repurchase program", pursuant to which quarterly share repurchases will be conducted, on up to approximately 5% of the weighted average number of outstanding shares in any 12-month period, to allow members who hold Class A, C, I, P-A (commencing as of April 16, 2018) or P-I shares (commencing as of October 1, 2017) to sell shares back to the company at a price equal to the then current offering price less the selling commissions and dealer manager fees associated with that class of shares. The company is not obligated to repurchase shares and the board of directors may terminate the share repurchase program at its sole discretion. The share repurchase program includes numerous restrictions that will limit a shareholder's ability to sell shares. Unless the board of directors determines otherwise, the company limits the number of shares to be repurchased during any calendar year to the number of shares the company can repurchase with the proceeds received from the sale of shares under the DRP. At the sole discretion of the board of directors, the company may also use cash on hand, cash available from borrowings and cash from liquidation of investments to repurchase shares. In addition, the company plans to limit repurchases in each fiscal quarter to 1.25% of the weighted average number of shares outstanding in the prior four fiscal quarters. For the year ended December 31, 2019, the company repurchased 558,579 Class A shares, 16,929, Class C shares, 185,871 Class I shares and 223,681 Class P-I shares at a total purchase price of $4,807,693, $142,110, $1,596,905 and $1,975,682, respectively, pursuant to the company's share repurchase program. For the year ended December 31, 2018, the company repurchased 422,979 Class A shares, 7,601 Class C shares, 59,781 Class I shares and 15,481 Class P-I shares at a total purchase price of $3,743,387, $65,340, $528,898 and $136,845, respectively, pursuant to the company's share repurchase program. For the year ended December 31, 2017, the company repurchased 368,925 Class A shares, 6,041 Class C shares, 81,315 Class I shares and 10,309 Class P-I shares at a total purchase price of $3,280,566, $53,073, $724,059 and $90,000, respectively, pursuant to the company's share repurchase program. We have received an order for our repurchase program from the SEC under Rule 102(a) of Regulation M under the Exchange Act. In addition, our repurchase program is substantially similar to repurchase programs for which the SEC has stated it will not recommend enforcement action under Rule 13e-4 and Regulation 14E under the Exchange Act.

Distributions

Distributions	12 Months Ended
	Dec. 31, 2019
Distributions Made to Members or Limited Partners [Abstract]
Distributions	Note 8. Distributions On the last business day of each month, with the authorization of the company's board of directors, the company declares distributions on each outstanding Class A, C, I, P-A and P-I share. These distributions are calculated based on shareholders of record for each day in amounts equal to that exhibited in the table below based upon distribution period and class of share. Class of Share Distribution Period A C I P-A P-I 1-Nov-15 31-Jan-16 $ 0.00164780 $ 0.00164780 $ 0.00164780 — — 1-Feb-16 30-Apr-16 $ 0.00165510 $ 0.00165510 $ 0.00165510 — — 1-May-16 31-Jul-16 $ 0.00166170 $ 0.00166170 $ 0.00166170 $ 0.00158260 $ 0.00158260 1-Aug-16 31-Oct-16 $ 0.00167660 $ 0.00167660 $ 0.00167660 $ 0.00159680 $ 0.00159680 1-Nov-16 31-Jan-17 $ 0.00168560 $ 0.00164020 $ 0.00168560 $ 0.00160360 $ 0.00160360 1-Feb-17 31-Apr-17 $ 0.00168070 $ 0.00163500 $ 0.00168070 $ 0.00159520 $ 0.00159520 1-May-17 31-Jul-17 $ 0.00167100 $ 0.00162730 $ 0.00167100 $ 0.00159520 $ 0.00158280 1-Aug-17 31-Oct-17 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00159010 1-Nov-17 31-Jan-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00158280 1-Feb-18 30-Apr-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00158280 1-May-18 31-Jul-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00158280 1-Aug-18 31-Oct-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Nov-18 31-Jan-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Feb-19 30-Apr-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-May-19 31-Jul-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Aug-19 31-Oct-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Nov-19 31-Dec-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 The following table reflects the distributions declared during the year ended December 31, 2019: Pay Date Paid in Cash Values of Shares Issued Under DRP Total February 1, 2019 $ 1,317,325 $ 583,571 $ 1,900,896 March 1, 2019 1,247,614 552,615 1,800,229 April 1, 2019 1,452,585 611,400 2,063,985 May 1, 2019 1,438,057 600,614 2,038,671 June 3, 2019 1,553,801 622,584 2,176,385 July 1, 2019 1,764,339 383,813 2,148,152 August 1, 2019 1,850,929 393,237 2,244,166 September 2, 2019 1,664,451 613,333 2,277,784 October 1, 2019 1,647,779 589,769 2,237,548 November 1, 2019 1,715,922 609,493 2,325,415 December 2, 2019 1,693,670 587,119 2,280,789 January 1, 2020 1,784,956 605,129 2,390,085 Total $ 19,131,428 $ 6,752,677 $ 25,884,105 The following table reflects the distributions declared during the year ended December 31, 2018: Pay Date Paid in Cash Value of Shares Issued under DRP Total February 1, 2018 $ 728,738 $ 464,821 $ 1,193,559 March 1, 2018 682,039 428,310 1,110,349 April 2, 2018 790,925 474,370 1,265,295 May 1, 2018 792,185 475,874 1,268,059 June 1, 2018 883,662 507,728 1,391,390 July 2, 2018 927,638 502,333 1,429,971 August 1, 2018 1,013,883 529,333 1,543,216 September 4, 2018 1,078,310 541,479 1,619,789 October 1, 2018 1,097,313 529,751 1,627,064 November 1, 2018 1,178,736 555,383 1,734,119 December 3, 2018 1,177,142 546,446 1,723,588 January 2, 2019 1,260,777 570,961 1,831,738 Total $ 11,611,348 $ 6,126,789 $ 17,738,137 The following table reflects the distributions declared during the year ended December 31, 2017: Pay Date Paid in Cash Value of Shares Issued under DRP Total February 1, 2017 $ 431,686 $ 349,842 $ 781,528 March 1, 2017 413,270 332,761 746,031 April 3, 2017 482,113 371,902 854,015 May 1, 2017 486,864 370,463 857,327 June 1, 2017 524,909 383,585 908,494 July 3, 2017 534,165 382,339 916,504 August 1, 2017 572,833 406,993 979,826 September 1, 2017 600,962 415,864 1,016,826 October 2, 2017 603,869 411,848 1,015,717 November 1, 2017 637,604 436,753 1,074,357 December 1, 2017 656,495 430,860 1,087,355 January 2, 2018 711,306 454,324 1,165,630 Total $ 6,656,076 $ 4,747,534 $ 11,403,610 All distributions paid for the year ended December 31, 2019 are expected to be reported as a return of capital to members for tax reporting purposes and all distributions paid for the years ended December 31, 2018 and 2017 were reported as a return of capital to members for tax purposes. Cash distributions paid during the periods presented were funded from the following sources noted below: For the For the For the Cash from operations $ 4,088,660 $ 11,611,348 $ 6,656,075 Offering proceeds 15,042,768 — — Total cash distributions $ 19,131,428 $ 11,611,348 $ 6,656,075 The company expects to continue to fund distributions from a combination of cash from operations as well as offering proceeds. Due to the company's change in investment portfolio composition in 2018 to include a greater percentage of pre-operational assets, a significant amount of distributions will continue to be funded from offering proceeds.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Note 9. Income Taxes The LLC conducts most of its operations through GREC, its taxable wholly-owned subsidiary. The consolidated income tax provision for the years ended December 31, 2019, 2018 and 2017 is comprised of the following: Current Deferred Total Year ended December 31, 2019: US federal $ - $ 3,551,704 $ 3,551,704 State and local - (44,946 ) (44,946 ) Foreign jurisdiction - - - Tax (benefit) expense $ - $ 3,506,758 $ 3,506,758 Change in valuation allowance - 1,231,693 1,231,693 Deferred tax (benefit) expense - (3,188,431 ) (3,188,431 ) Change in benefit from deferred taxes on unrealized depreciation on investments - 7,926,882 7,926,882 Tax (benefit) expense, net $ - $ 4,738,451 $ 4,738,451 Current Deferred Total Year ended December 31, 2018: US federal $ - $ (1,218,349 ) $ (1,218,349 ) State and local - (254,810 ) (254,810 ) Foreign jurisdiction - - - Tax benefit/(expense) $ - $ (1,473,159 ) $ (1,473,159 ) Change in valuation allowance - (54,758 ) (54,758 ) Tax benefit/(expense), net $ - $ (1,527,917 ) $ (1,527,917 ) Current Deferred Total Year ended December 31, 2017: US federal $ - $ 1,289,202 $ 1,289,202 State and local - 273,787 273,787 Foreign jurisdiction - - - Tax (benefit) expense $ - $ 1,562,989 $ 1,562,989 Change in valuation allowance - 92,366 92,366 Tax benefit/(expense), net $ - $ 1,655,355 $ 1,655,355 The following table represents the components of the income tax expense and the proportionate ratio of each components as follows: 2019 Percentage 2018 Percentage 2017 Percentage Net increase in net assets from operations before tax, based on ASC 946, at the federal income tax rate $ 7,125,202 150.37 % $ 2,523,711 (165.17 )% $ 2,793,488 168.75 % Add: Greenbacker Renewable Energy, LLC's loss treated as a partnership for U.S. tax purposes, at federal income tax rate $ 1,387,056 29.27 % $ 283,062 (18.53 )% $ 337,284 20.38 % Add: Greenbacker Renewable Energy Corporation's consolidated book (loss) based on standard GAAP accounting, at federal income tax rate $ (4,713,909 ) (99.48 )% $ (3,769,926 ) 246.74 % $ (2,225,352 ) (134.43 )% Federal tax credit $ (246,645 ) (5.21 )% $ (255,196 ) 16.70 % $ - - % Increase in income taxes resulting from: State and local taxes, net of federal benefit $ 969,124 20.45 % $ (270,036 ) 17.67 % $ 261,224 15.78 % Change in state rate $ (1,014,070 ) (21.40 )% $ 15,226 (1.00 )% $ 12,562 0.76 % Change in federal rate $ - - % $ - - % $ 383,783 23.18 % Change in valuation allowances $ 1,231,693 26.00 % $ (54,758 ) 3.59 % $ 92,366 5.58 % Actual provision for income taxes $ 4,738,451 100.00 % $ (1,527,917 ) 100.00 % $ 1,655,355 100.00 % Deferred tax assets have been classified on the accompanying consolidated statements of assets and liabilities as of December 31, 2019 and 2018 as follows: 2019 2018 Amortization 53,558 60,181 Net operating losses 27,935,648 21,289,433 Federal tax credits 7,046,772 5,756,076 Unrealized gains (32,223,751 ) (20,786,706 ) Deferred tax assets 2,812,227 $ 6,318,984 Less: valuation allowance (1,498,721 ) (267,027 ) Deferred tax assets, net 1,313,506 $ 6,051,957 As of December 31, 2019, the company has federal and state income tax net operating loss ("NOL") and investment tax credit ("ITC") carryforwards of which will expire on various dates through 2039 as follows: Expires Year Ending December 31, Federal NOL Amount Federal ITC Amount State ITC Amount State NOL Amount 2020 $ — $ — $ 802,822 — 2021 $ — $ — $ 422,885 $ — 2022 $ — $ — $ — $ 918,368 2023 $ — $ — $ — $ 2,454,562 2024 $ — $ — $ — $ 2,549,437 2025 $ — $ — $ — $ 673,181 2026 $ — $ — $ — $ 2,934,175 2027 $ — $ — $ — $ 4,162,481 2028 $ — $ — $ — $ 10,579,879 2029 $ — $ — $ — $ — 2030 $ — $ — $ — $ 2,751,775 2031 $ — $ — $ — $ 5,377,684 2032 $ — $ — $ — $ 8,015,544 2033 $ — $ — $ — $ 7,163,874 2034 $ 161,963 $ — $ — $ 156,188 2035 $ 6,693,198 $ 3,345,092 $ — $ 2,718,197 2036 $ 15,734,069 $ 1,955,780 $ — $ 5,911,423 2037 $ 26,927,165 $ — $ — $ 13,684,243 2038 $ 35,706,007 $ 273,548 $ — $ 18,592,693 2039 $ 20,866,683 $ 246,645 $ — $ — Indefinite $ — $ — $ — $ — As new tax legislation was enacted on December 22, 2017, commonly referred to as the Tax Cuts and Jobs Act (the "Act"), the company recognized the effect of any material changes in the Act in the determination of deferred tax assets and liabilities for the year ending December 31, 2017. The major aspects of the Act which affected the company included 1) the reduction of the corporate tax rate to 21%, effective December 22, 2017, which caused the company to remeasure its deferred tax assets and liabilities to reflect the effects of tax rate change; and 2) a deduction of interest expense up to only 30% of "adjusted taxable income" (as defined in the Act) ) and the ability of post 2017 net operating losses ("NOLs") to only offset up to 80% of taxable income, with the understanding that any unused NOL can be carried forward indefinitely, which caused the company to modify certain assumptions in regard to utilization of NOL and investment tax credits in determining any potential valuation allowance. While cost recovery was modified to allow companies to expense 100% of investments in depreciable property, the company expects to continue to depreciate renewable energy assets over a five-year life using accelerated methodology. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax assets, projected future taxable income, and tax planning strategies in making this assessment. Based upon projections for future taxable income over the periods in which the deferred tax assets would be deductible, management as of December 31, 2019 has applied a partial valuation allowance of $1,498,721 against the deferred tax asset amounts the company will not be able to fully realize, as compared with $267,027 for the year ended December 31, 2018. The company follows the authoritative guidance on accounting for uncertainty in income taxes and concluded it has no material uncertain tax positions to be recognized as of December 31, 2019. The company assessed its tax positions and filings for all open tax years as of December 31, 2019 for all federal and state tax jurisdictions for the years 2014 through 2019. The results of this assessment are included in the company's tax provision and deferred tax assets as of December 31, 2019.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 10. Commitments and Contingencies Legal proceedings: Pledge of collateral and unsecured guarantee of loans to subsidiaries: Investment in to be constructed assets Investment in operating assets: Unsecured guarantee of subsidiary renewable energy credit ("REC") forward contracts See Note 1 — Organization and Operations of the Company and Note 5 — Related Party Agreements and Transactions Agreements for an additional discussion of the company's commitments and contingencies.

Financial Highlights

Financial Highlights	12 Months Ended
	Dec. 31, 2019
Financial Highlights [Abstract]
Financial Highlights	Note 11. Financial Highlights The following is a schedule of financial highlights of the company attributed to Class A, C, I, P-A and P-I shares for the year ended December 31, 2019. For the year ended December 31, 2019 Class A Shares Class C Shares Class I Shares Class P-A Shares Class P-I Shares Per share data attributed to common shares (1) Net Asset Value at beginning of period $ 8.54 $ 8.34 $ 8.54 $ 8.55 $ 8.76 Net investment income (3) 0.17 0.17 0.17 0.17 0.17 Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder 0.80 0.80 0.80 0.80 0.80 Change in translation of assets and liabilities denominated in foreign currencies (4) - - - - - Change in benefit from deferred taxes on unrealized depreciation on investments (0.18 ) (0.18 ) (0.18 ) (0.18 ) (0.18 ) Net increase in net assets attributed to common stockholders 0.79 0.79 0.79 0. 79 0.79 Shareholder distributions: Distributions from net investment income (0.10 ) (0.10 ) (0.10 ) (0.10 ) (0.10 ) Distributions from offering proceeds (0.51 ) (0.50 ) (0.51 ) (0.51 ) (0.48 ) Offering costs and deferred sales commissions (0.02 ) (0.05 ) (0.02 ) - - Other (2) (0.14 ) (0.10 ) (0.13 ) (0.13 ) (0.07 ) Net decrease in members' equity attributed to common shares (0.77 ) (0.75 ) (0.76 ) (0.74 ) (0.65 ) Net asset value for common shares at end of period $ 8.56 $ 8.38 $ 8.56 $ 8.60 $ 8.90 Common members' equity at end of period $ 147,304,141 $ 22,792,345 $ 57,292,421 $ 155,802 $ 189,009,074 Common shares outstanding at end of period 17,210,016 2,718,475 6,693,658 18,109 21,249,352 Ratio/Supplemental data for common shares (annualized): Total return attributed to common shares based on net asset value 8.06 % 7.79 % 8.05 % 7.66 % 8.49 % Ratio of net investment income to average net assets 1.97 % 1.98 % 1.95 % 1.96 % 1.91 % Ratio of operating expenses to average net assets 3.94 % 3.96 % 3.90 % 3.92 % 3.81 % Portfolio turnover rate 14.04 % 14.04 % 14.04 % 14.04 % 14.04 % (1) The per share data for Class A, C, I, P-A and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2019, which were 17,270,555, 2,645,713, 6,642,314, 17,841, and 17,211,763, respectively. (2) Represents the impact of different share amounts used in calculating certain per share data based on weighted average shares outstanding during the period and the impact of shares at a price other than the net asset value. (3) Does not reflect any incentive fees that may be payable to the Special Unitholder. (4) Amount is less than $0.01 per share. The following is a schedule of financial highlights of the company attributed to Class A, C, I, P-A and P-I shares for the year ended December 31, 2018. For the year ended December 31, 2018 Class A Shares Class C Shares Class I Shares Class P-A Shares (5) Class P-I Shares Per share data attributed to common shares (1) Net Asset Value at beginning of period $ 8.68 $ 8.42 $ 8.68 $ 8.75 $ 8.81 Net investment income (3) 0.28 0.28 0.28 0.07 0.28 Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder 0.12 0.12 0.12 (0.05 ) 0.12 Change in translation of assets and liabilities denominated in foreign currencies (4) - - - - - Change in benefit from deferred taxes on unrealized depreciation on investments 0.08 0.08 0.08 0.12 0.08 Net increase in net assets attributed to common members 0.48 0.48 0.48 0.14 0.48 Shareholder distributions: Distributions from net investment income (0.33 ) (0.33 ) (0.33 ) (0.08 ) (0.30 ) Distributions from offering proceeds (0.28 ) (0.26 ) (0.28 ) (0.14 ) (0.28 ) Offering costs and deferred sales commissions (0.03 ) (0.08 ) (0.04 ) (0.14 ) - Other (2) 0.02 0.11 0.03 0.02 0.05 Net decrease in members' equity attributed to common shares (0.62 ) (0.56 ) (0.62 ) (0.34 ) (0.53 ) Net asset value for common shares at end of period $ 8.54 $ 8.34 $ 8.54 $ 8.55 $ 8.76 Common shareholders' equity at end of period $ 142,791,899 $ 18,546,310 $ 53,046,260 $ 132,272 $ 103,742,870 Common shares outstanding at end of period 16,714,738 2,222,478 6,209,416 15,478 11,841,392 Ratio/Supplemental data for common shares (annualized): Total return attributed to common shares based on net asset value 5.45 % 6.19 % 5.44 % 1.06 % 6.16 % Ratio of net investment income to average net assets 3.24 % 3.26 % 3.20 % 1.97 % 2.86 % Ratio of operating expenses to average net assets 3.87 % 3.95 % 3.86 % 3.48 % 3.69 % Portfolio turnover rate 0.05 % 0.05 % 0.05 % 0.05 % 0.05 % (1) The per share data for Class A, C, I, P-A and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2018, which were 15,338,291, 1,803,985, 5,386,556, 11,042, and 7,266,426, respectively. (2) Represents the impact of different share amounts used in calculating certain per share data based on weighted average shares outstanding during the period and the impact of shares at a price other than the net asset value. (3) Does not reflect any incentive fees that may be payable to the Special Unitholder. (4) Amount is less than $0.01 per share. (5) Class P-A shares were reinstated for sale as of April 16, 2018 and first sold on August 6, 2018. The following is a schedule of financial highlights of the company attributed to Class A, C, I and P-I shares for the year ended December 31, 2017. For the year ended December 31, 2017 Class A Shares Class C Shares Class I Shares Class P-I Shares Per share data attributed to common shares (1) Net Asset Value at beginning of period $ 8.69 $ 8.44 $ 8.69 $ 8.67 Net investment income (3) 0.25 0.25 0.25 0.25 Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder 0.35 0.35 0.35 0.35 Change in translation of assets and liabilities denominated in foreign currencies (4) 0.01 0.01 0.01 0.01 Change in benefit from deferred taxes on unrealized depreciation on investments 0.05 0.05 0.05 0.05 Net increase in net assets attributed to common members 0.66 0.66 0.66 0.66 Shareholder distributions: Distributions from net investment income (0.39 ) (0.39 ) (0.39 ) (0.39 ) Distributions from offering proceeds (0.22 ) (0.22 ) (0.21 ) (0.19 ) Offering costs and deferred sales commissions. (0.04 ) (0.15 ) (0.08 ) - Other (2) (0.02 ) 0.08 0.01 0.06 Net decrease in members' equity attributed to common shares (0.01 ) (0.02 ) (0.01 ) 0.14 Net asset value for common shares at end of period $ 8.68 $ 8.42 $ 8.68 $ 8.81 Common shareholders' equity at end of period $ 120,344,517 $ 12,053,349 $ 39,181,769 $ 29,858,889 Common shares outstanding at end of period 13,857,830 1,431,999 4,511,832 3,387,568 Ratio/Supplemental data for common shares (annualized): Total return attributed to common shares based on net asset value 6.90 % 6.77 % 6.90 % 8.65 % Ratio of net investment income to average net assets 2.96 % 3.04 % 2.96 % 2.92 % Ratio of operating expenses to average net assets. 3.64 % 3.74 % 3.64 % 3.59 % Portfolio turnover rate 19.15 % 19.15 % 19.15 % 19.15 % (1) The per share data for Class A, C, I and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2017, which were 12,384,101, 1,194,718, 3,529,998 and 1,792,632, respectively. (2) Represents the impact of different share amounts used in calculating certain per share data based on weighted average shares outstanding during the period and the impact of shares at a price other than the net asset value. (3) Does not reflect any incentive fees that may be payable to the Special Unitholder. (4) Amount is less than $0.01 per share.

Selected Quarterly Data (Unaudi

Selected Quarterly Data (Unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Data (Unaudited)	Note 12. Selected Quarterly Data (Unaudited) Presented in the following tables is a summary of the unaudited quarterly financial information for the years ended December 31, 2019, 2018, 2017, 2016, and 2015. The company believes that all necessary adjustments, consisting only of normal recurring adjustments, have been included in the amounts stated below to present fairly, and in accordance with GAAP, the selected quarterly information. For the quarter ended December 31, September 30, June 30, March 31, Total Investment income $ 4,640,954 $ 6,679,823 $ 4,876,003 $ 2,565,925 Net investment income $ 4,587,394 $ 2,067,331 $ 1,417,709 $ (795,343 ) Net gain(loss) on investments and foreign currency translation $ 5,248,381 $ 16,589,939 $ 6,098,299 $ 7,281,283 Change in (benefit) expense from deferred taxes on unrealized appreciation on investments $ (3,383,241 ) $ (2,463,723 ) $ (1,482,457 ) $ (597,461 ) Net increase (decrease) in net assets resulting from operations $ 6,452,534 $ 16,193,547 $ 6,033,551 $ 5,888,479 Net investment income (loss) per share - basic and diluted $ 0.10 $ 0.05 $ - $ (0.02 ) Net increase (decrease) in net assets resulting from operations per share - basic and diluted. $ 0.15 $ 0.36 $ 0.10 $ 0.15 Net asset value per share at period end (Class A) $ 8.60 $ 8.62 $ 8.48 $ 8.50 Net asset value per share at period end (Class C) $ 8.38 $ 8.44 $ 8.31 $ 8.32 Net asset value per share at period end (Class I) $ 8.60 $ 8.62 $ 8.48 $ 8.50 Net asset value per share at period end (Class P-A) $ 8.60 $ 8.65 $ 8.51 $ 8.53 Net asset value per share at period end (Class P-I) $ 8.90 $ 8.93 $ 8.77 $ 8.76 For the quarter ended December 31, September 30, June 30, March 31, Total Investment income $ 4,540,427 $ 5,103,336 $ 4,984,874 $ 4,918,793 Net investment income $ (434,963 ) $ 1,988,378 $ 3,259,425 $ 3,271,370 Net gain (loss) on investments and foreign currency translation $ (1,693,642 ) $ (296,054 ) $ 2,341,771 $ 2,452,402 Change in (benefit) expense from deferred taxes on unrealized appreciation on investments $ 1,877,386 $ 2,275,076 $ 73,354 $ (1,239,228 ) Net increase (decrease) in net assets resulting from operations $ (251,219 ) $ 3,967,400 $ 5,674,550 $ 4,484,544 Net investment income (loss) per share - basic and diluted $ (0.01 ) $ 0.06 $ 0.12 $ 0.13 Net increase (decrease) in net assets resulting from operations per share - basic and diluted $ (0.01 ) $ 0.12 $ 0.21 $ 0.19 Net asset value per share at period end (Class A) $ 8.54 $ 8.69 $ 8.72 $ 8.70 Net asset value per share at period end (Class C) $ 8.34 $ 8.48 $ 8.50 $ 8.45 Net asset value per share at period end (Class I) $ 8.54 $ 8.69 $ 8.72 $ 8.70 Net asset value per share at period end (Class P-A) $ 8.55 $ 8.71 $ — $ — Net asset value per share at period end (Class P-I) $ 8.76 $ 8.89 $ 8.90 $ 8.84 For the quarter ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total investment income $ 4,416,117 $ 3,663,635 $ 2,936,470 $ 2,366,899 Net investment income $ 229,297 $ 1,149,977 $ 1,986,899 $ 1,450,378 Net gain (loss) on investments and foreign currency translation $ 3,738,403 $ 1,579,619 $ 1,576,272 $ (108,245 ) Change in benefit (expense) from deferred taxes on unrealized appreciation on investments $ 1,198,186 $ 680,969 $ (653,366 ) $ (262,069 ) Net increase in net assets resulting from operations. $ 5,165,886 $ 3,410,565 $ 2,909,805 $ 1,080,064 Net investment income per share – basic and diluted. $ (0.01 ) $ 0.06 $ 0.11 $ 0.09 Net increase in net assets resulting from operations per share – basic and diluted. $ 0.22 $ 0.16 $ 0.15 $ 0.07 Net asset value per share at period end (Class A). $ 8.68 $ 8.64 $ 8.63 $ 8.64 Net asset value per share at period end (Class C). $ 8.42 $ 8.42 $ 8.41 $ 8.40 Net asset value per share at period end (Class I) $ 8.68 $ 8.64 $ 8.63 $ 8.64 Net asset value per share at period end (Class P-I). $ 8.81 $ 8.75 $ 8.73 $ 8.69 For the quarter ended December 31, 2016 September 30, 2016 June 30, 2016 March 31, 2016 Total investment income $ 2,848,655 $ 3,085,513 $ 1,645,291 $ 656,566 Net investment income $ 1,497,148 $ 1,730,438 $ 1,519,649 $ 23,132 Net gain (loss) on investments and foreign currency translation $ (1,706,876 ) $ 1,143,849 $ (231,426 ) $ (634,047 ) Change in benefit (expense) from deferred taxes on unrealized appreciation on investments $ 671,401 $ (8,372 ) $ 1,838,292 $ 1,885,335 Net increase in net assets resulting from operations $ 461,673 $ 2,865,915 $ 3,126,515 $ 1,274,420 Net investment income per share – basic and diluted $ 0.11 $ 0.14 $ 0.15 $ 0.00 Net increase in net assets resulting from operations per share – basic and diluted. $ 0.03 $ 0.24 $ 0.30 $ 0.16 Net asset value per share at period end (Class A) $ 8.69 $ 8.74 $ 8.69 $ 8.56 Net asset value per share at period end (Class C) $ 8.44 $ 8.49 $ 8.43 $ 8.56 Net asset value per share at period end (Class I) $ 8.69 $ 8.74 $ 8.69 $ 8.56 Net asset value per share at period end (Class P-A) $ 8.67 $ 8.74 $ - $ - Net asset value per share at period end (Class P-I) $ 8.67 $ 8.74 $ - $ - For the quarter ended December 31, 2015 September 30, 2015 June 30, 2015 March 31, 2015 Total investment income $ 421,488 $ 740,773 $ 633,646 $ 58,215 Net investment income (loss) $ 253,576 $ 270,523 $ 333,917 $ (118,483 ) Net gain (loss) on investments and foreign currency translation $ 666,498 $ 376,473 $ (46,396 ) $ 385,490 Change in benefit from deferred taxes on unrealized appreciation on investments $ 127,015 $ - $ - $ - Net increase in net assets resulting from operations $ 1,047,089 $ 646,996 $ 287,521 $ 267,007 Net investment income (loss) per share – basic and diluted $ 0.09 $ 0.07 $ 0.14 $ (0.08 ) Net increase in net assets resulting from operations per share – basic and diluted $ 0.20 $ 0.17 $ 0.12 $ 0.18 Net asset value per share at period end $ 8.54 $ 8.52 $ 8.50 $ 8.50

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 13. Subsequent Events The company's management has evaluated subsequent events through the date of issuance of the consolidated financial statements. There have been no subsequent events that occurred during such period that would require disclosure in the consolidated financial statements or would be required to be recognized in the consolidated financial statements as of the year ended December 31, 2019 except as discussed below: On March 5, 2020, the company signed and closed a transaction to sell the entirety of its investments in the Greenbacker Residential Solar Portfolio and the Greenbacker Residential Solar Portfolio II. The Portfolios were sold to a residential roof top solar aggregator for approximately $45 million to enable the buyer to achieve broad economies of scale across a much larger portfolio of residential solar roof top assets.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The company's consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles ("GAAP"), which requires the use of estimates, assumptions and the exercise of subjective judgment as to future uncertainties. Actual results could differ from those estimates, assumptions, and judgments. Significant items subject to such estimates will include determining the fair value of investments, revenue recognition, income tax uncertainties, and other contingencies. The consolidated financial statements of the company include the accounts of the LLC and its consolidated subsidiaries, GREC, GREC HoldCo, and Danforth Shared Services LLC which provides administrative services to the company. All intercompany accounts and transactions have been eliminated. The company's consolidated financial statements are prepared using the specialized accounting principles of Accounting Standards Codification Topic 946, Financial Services—Investment Companies ("ASC Topic 946"). In accordance with this specialized accounting guidance, the company recognizes and carries all of its investments at fair value with changes in fair value recognized in earnings. Additionally, the company will not apply the equity method of accounting to its investments. The company carries its liabilities at amounts payable, net of unamortized premiums or discounts. The company does not currently plan to elect to carry its non-investment liabilities at fair value. Net assets are calculated as the carrying amounts of assets, including the fair value of investments, less the carrying amounts of its liabilities. The financial information associated with the December 31, 2019 consolidated financial statements has been prepared by management and, in the opinion of management, contains all adjustments and eliminations necessary for a fair presentation in accordance with GAAP.
Basis of Consolidation	Basis of Consolidation As provided under Regulation S-X and ASC Topic 946, the company will generally not consolidate its investment in a company other than a wholly-owned investment company or controlled operating company whose business consists of providing services to the company. Accordingly, the company consolidated the accounts of the company's wholly-owned subsidiaries to meet the aforementioned criteria in its consolidated financial statements.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash consists of demand deposits at a financial institution. Such deposits may be in excess of the Federal Deposit Insurance Corporation insurance limits. The company has not experienced any losses in any such accounts. The company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Short-term investments that are cash equivalents, which are considered level 1 investments, are stated at cost, which approximates fair value.
Restricted Cash	Restricted Cash Restricted cash consists of cash accounts or letters of credit that are restricted for use on specific investments. As of December 31,2019, we have one restricted cash account that serves as collateral for a letter of credit related to funding of a specific "to be constructed" investment.
Foreign Currency Translation	Foreign Currency Translation The accounting records of the company are maintained in U.S. Dollars. The fair value of investments and other assets and liabilities denominated in non-U.S. currencies are translated into U.S. Dollars using the exchange rate at the end of each reporting period. Amounts related to the purchases and sales of investments, investment income and expenses are translated at the rates of exchange prevailing on the respective dates of such transactions. Net unrealized currency gains and losses arising from valuing foreign currency denominated assets and liabilities at the current exchange rate are reflected as part of net change in unrealized appreciation (depreciation) on translation of assets and liabilities denominated in foreign currencies in the consolidated statements of operations. Foreign security and currency translations may involve certain considerations and risks not typically associated with investing in U.S. companies and U.S. government securities. These risks include, but are not limited to, currency fluctuations and revaluations and future adverse political, social and economic developments, which could cause investments in foreign markets to be less liquid and prices more volatile than those of comparable U.S. companies or U.S. government securities.
Valuation of Investments at Fair Value	Valuation of Investments at Fair Value Accounting Standards Codification Topic 820, Fair Value Measurement ("ASC Topic 820") defines fair value, establishes a framework for measuring fair value in accordance with GAAP and expands disclosures about fair value. The company recognizes and accounts for its investments at fair value. The fair value of the investments does not reflect transaction costs that may be incurred upon disposition of the investments. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is an exchange price notion under which fair value is the price in an orderly transaction between market participants to sell an asset or transfer a liability in the market in which the reporting entity would transact for the asset or liability. The advisor has established procedures to estimate the fair value of its investments which the company's board of directors has reviewed and approved. The company will use observable market data to estimate the fair value of investments to the extent that such market data is available. In the absence of quoted market prices in active markets, or quoted market prices for similar assets in markets that are not active, the company will use the valuation methodologies described below with unobservable data based on the best available information in the circumstances, which incorporates the company's assumptions about the factors that a market participant would use to value the asset. For investments for which quoted market prices are not available, which will comprise most of our investment portfolio, fair value will be estimated by using the income or market approach. The income approach assumes that value is created by the expectation of future benefits discounted to a current value and the fair value estimate is the amount an investor would be willing to pay to receive those future benefits. The market approach compares recent comparable transactions to the investment or an offer to purchase an investment based upon a firm bid, a signed term sheet and/or a signed purchase agreement. Adjustments are made to account for the probability of the deal closing and any dissimilarity between the comparable transactions and the investments. Pre-operational assets are held at cost until they are operational. Therefore, the fair value associated with these assets are essentially cost. These valuation methodologies involve a significant degree of judgment on the part of our advisor. In determining the appropriate fair value of an investment using these approaches, the most significant information and assumptions include, as applicable: available current market data, including relevant and applicable comparable market transactions, applicable market yields and multiples, security covenants, call protection provisions, information rights, the nature and realizable value of any collateral, the investment's ability to make payments, its earnings and discounted cash flows, the markets in which the project does business, comparisons of financial ratios of peer companies that are public, comparable mergers and acquisitions, the principal market and enterprise values, environmental factors, among other factors. The estimated fair values will not necessarily represent the amounts that may be ultimately realized due to the occurrence or non-occurrence of future circumstances that cannot be reasonably determined. Because of the inherent uncertainty of the valuation of the investments, the estimate of fair values may differ significantly from the value that would have been used had a broader market for the investments existed. The authoritative accounting guidance prioritizes the use of market-based inputs over entity-specific inputs and establishes a three-level hierarchy for fair value measurements based upon the transparency of inputs to the valuation. The three levels of valuation hierarchy are defined as follows: Level 1: Unadjusted quoted prices for identical assets or liabilities in active markets. Level 2: Other significant observable inputs that are sourced either directly or indirectly from publications or pricing services, including dealer or broker markets, for identical or comparable assets or liabilities. Generally, these inputs should be widely accepted and public, non-proprietary and sourced from an independent third party. Level 3: Inputs derived from a significant amount of unobservable market data and derived primarily through the use of internal valuation methodologies In all cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls will be determined based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of an input to the fair value measurement in its entirety requires judgment and considers factors specific to each investment.
Calculation of Net Asset Value	Calculation of Net Asset Value Net asset value by share class is calculated by subtracting total liabilities for each class from the total carrying amount of all assets for that class, which includes the fair value of investments. Net asset value per share is calculated by dividing net asset value for each class by the total number of outstanding common shares for that class on the reporting date.
Earnings (Loss) per Share	Earnings (Loss) per Share In accordance with the provisions of ASC Topic 260 — Earnings per Share ("ASC Topic 260"), basic earnings per share is computed by dividing earnings available to common members by the weighted average number of shares outstanding during the period. Other potentially dilutive common shares, and the related impact to earnings, are considered when calculating earnings per share on a diluted basis. The following information sets forth the computation of the weighted average basic and diluted net increase in net assets attributed to common members per share for the years ended December 31, 2019, 2018 and 2017. For the year ended For the year ended For the year ended Basic and diluted Net increase in net assets resulting from operations attributed to common members $ 29,297,441 $ 13,314,380 $ 11,330,663 Weighted average common shares outstanding 43,788,187 29,799,735 18,922,343 Net increase in net assets resulting from operations attributed to common members per share $ 0.67 $ 0.45 $ 0.60
Revenue Recognition	Revenue Recognition To the extent the company expects to collect such amounts, interest income is recorded on an accrual basis. If there is reason to doubt an ability to collect such interest, interest receivable on loans and debt securities is not accrued for accounting purposes. Original issue discounts, market discounts or market premiums are accreted or amortized using the effective interest method as interest income. Prepayment premiums on loans and debt securities are recorded as interest income when received. Any application, origination or other fees earned by the company in arranging or issuing debt are amortized over the expected term of the loan. Loans are placed on non-accrual status when principal and interest are 90 days or more past due, or when there is a reasonable doubt that principal or interest will be collected. Accrued interest is generally reversed when a loan is placed on non-accrual. Interest payments received on non-accrual loans may be recognized as income or applied to principal depending upon management's judgment regarding collectability. Non-accrual loans are generally restored to accrual status when past due and principal and interest is paid and, in management's judgment, is likely to remain current. Dividend income is recorded (1) on the ex-dividend date for publicly issued securities and (2) on the ex-dividend date for private investments. The timing and amount of dividend income is determined on at least a quarterly basis by GREC. This process includes an analysis at the individual project company level based on cash available from operations and working capital needed for the project company operations. Dividend income from our privately held, equity investments are recognized when approved. Dividends received from the company's project companies, which generally reflect net cash flow from operations, are declared, accrued and paid on a quarterly basis at a minimum.
Net Realized Gains or Losses and Net Change in Unrealized Appreciation or Depreciation on Investments	Net Realized Gains or Losses and Net Change in Unrealized Appreciation or Depreciation on Investments Realized gains or losses will be measured as the difference between the net proceeds from the sale, repayment, or disposal of an asset and the adjusted cost basis of the asset, without regard to unrealized appreciation or depreciation previously recognized. Net change in unrealized appreciation or depreciation will reflect the change in investment values during the reporting period, including any reversal of previously recorded unrealized appreciation or depreciation, when gains or losses are realized.
Payment-in-Kind Interest	Payment-in-Kind Interest For loans and debt securities with contractual payment-in-kind interest, if the fair value of the investment indicates that such interest is collectible, any interest will be added to the principal balance of such investments and be recorded as income.
Distribution Policy	Distribution Policy Distributions to members, if any, will be authorized and declared by our board of directors quarterly in advance and paid monthly. From time to time, we may also pay interim special distributions in the form of cash or shares, with the approval of our board of directors. Distributions will be made on all classes of shares at the same time. The cash distributions with respect to the Class C shares will be lower than the cash distributions with respect to the company's other share classes because of the distribution fee associated with the Class C shares, which is allocated specifically to Class C net assets. Amounts distributed to each class are allocated amongst the holders of the shares in such class in proportion to their shares. Distributions declared by our board of directors are recognized as distribution liabilities on the ex-dividend date.
Organization and Offering Costs	Organization and Offering Costs Organization and offering costs ("O&O costs"), other than sales commissions and the dealer manager fee, were initially paid by our advisor and/or dealer manager on behalf of the company. These O&O costs included all costs previously paid or to be paid by the company in connection with its formation and the offering of its shares pursuant to now-terminated Registration Statements on Form S-1 (File No. 333-178786-01 and File No. 333-211571, respectively) and a private placement memorandum, including legal, accounting, printing, mailing and filing fees, charges of the company's escrow holder, transfer agent fees, due diligence expense reimbursements to participating broker-dealers included in detailed and itemized invoices and costs in connection with administrative oversight of the offering and marketing process, and preparing supplemental sales materials, holding educational conferences, and attending retail seminars conducted by broker-dealers. The company was obligated to reimburse our advisor for O&O costs that it incurred on behalf of the company, in accordance with the advisory agreement, but with respect to the company's public offerings, only to the extent that the reimbursement would not cause the selling commissions, the dealer manager fee and the other organization and offering expenses borne by the company to exceed 15% of gross offering proceeds as of the date of reimbursement. Total O&O costs related to the terminated Registration Statements amounted to $9.4 million, approximately 3.8% of gross offering proceeds raised pursuant to such Registration Statements. The costs incurred by our advisor and/or dealer manager are recognized as a liability of the company to the extent that the company is obligated to reimburse our advisor and/or dealer manager, subject to the 15% of gross offering proceeds limitation described above. When recognized by the company, organizational costs are expensed and offering costs, excluding selling commissions and dealer manager fees, are recognized as a reduction of the proceeds from the offering. The following table provides information in regard to the status of O&O costs (in 000's) as of December 31, 2019 and 2018: December 31, December 31, Total O&O Costs Incurred by the Advisor and Dealer Manager $ 9,822 $ 9,371 Amounts previously reimbursed to the Advisor/Dealer Manager by the company 9,822 9,106 Amounts payable to Advisor by the company - 19 Amounts of the contingent liability subject to payment by the company only upon adequate gross offering proceeds being raised - 246
Financing Costs	Financing Costs Financing costs related to debt liabilities incurred by the company, GREC or any wholly-owned holding company formed specifically to be a credit agreement counterparty are presented on the consolidated statements of assets and liabilities as a direct deduction from the carrying amount of that debt liability. Financing costs are deferred and amortized using the straight-line method over the life of the debt liability.
Capital Gains Incentive Allocation and Distribution	Capital Gains Incentive Allocation and Distribution Pursuant to the terms of the LLC's amended and restated limited liability company agreement, a capital gains incentive fee will be earned by an affiliate of our advisor on realized gains (net of realized and unrealized losses) since inception from the sale of investments from the company's portfolio during operations prior to a liquidation of the company. While the terms of the advisory agreement neither include nor contemplate the inclusion of unrealized gains in the calculation of the capital gains incentive fee, the company will include unrealized gains in the calculation of the capital gains incentive distribution pursuant to an interpretation of an American Institute for Certified Public Accountants Technical Practice Aid for investment companies. This amount reflects the incentive distribution that would be payable if the company's entire portfolio was liquidated at its fair value as of the consolidated statements of assets and liabilities date even though the advisor is not entitled to an incentive distribution with respect to unrealized gains unless and until such gains are realized. Thus, on each date that net asset value is calculated, the company calculates for the capital gains incentive distribution by calculating such distribution as if it were due and payable as of the end of such period and reflected as an allocation of equity between common members and the Special Unitholder. As of December 31, 2019, and 2018, a capital gains incentive distribution allocation in the amounts of $6,897,808 and $1,797,138, respectively, was recorded in the consolidated statements of assets and liabilities as Special unitholder's equity.
Deferred Sales Commissions	Deferred Sales Commissions The company defers certain costs, principally sales commissions and related compensation, which are paid to the dealer manager and may be reallowed to financial advisors and broker/dealers in the future in connection with the sale of Class C shares sold with a reduced front-end load sales charge. The costs expected to be incurred at the time of the sale of Class C shares are recorded as a liability on the date of sale and are amortized on a straight-line basis over the period beginning at the time of sale and ending on the date which approximates an expected liquidity event for the company. As of December 31, 2019, and December 31, 2018, the company recorded a liability for deferred sales commissions in the amount of $56,483 and $191,706, respectively.
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform with current year presentation. These reclassifications had no impact on prior periods' results.
Derivative Instruments	Derivative Instruments The company may utilize interest rate swaps to modify interest rate characteristics of existing debt obligations to manage interest rate exposure. These are recorded at fair value either as assets or liabilities in the accompanying consolidated statements of assets and liabilities with changes in the fair value of interest rate swaps during the period recognized as either an unrealized appreciation or depreciation in the accompanying consolidated statements of operations. On the expiration, termination or settlement of a derivatives contract, the company generally records a gain or loss. When there is a master netting agreement with a financial institution, any gain or loss on interest rate swaps are netted for financial statement presentation. The fair value of interest rate swap contracts open as of December 31, 2019 is included on the schedule of investments by contract. For the year ended December 31, 2019, the company's average monthly notional exposure to interest rate swap contracts was $93,920,446. Consolidated Statements of Assets and Liabilities — Fair Values of Derivatives at December 31, 2019 Asset Derivatives Liability Derivatives Risk Exposure Consolidated Statement of Assets and Liabilities Location Fair Value Consolidated Statement of Assets and Liabilities Location Fair Value Swaps Interest Rate Risk Swap contracts, at fair value $ 21,223 Swap contracts, at fair value $ 4,899,566 $ 21,223 $ 4,899,566 Consolidated Statements of Assets and Liabilities — Fair Values of Derivatives at December 31, 2018. Asset Derivatives Liability Derivatives Risk Exposure Consolidated Statement of Assets and Liabilities Location Fair Value Consolidated Statement of Assets and Liabilities Location Fair Value Swaps Interest Rate Risk Swap contracts, at fair value $ 435,603 Swap contracts, at fair value $ 311,641 $ 435,603 $ 311,641 The effect of derivative instruments on the Consolidated Statements of Operations Risk Exposure Change in net unrealized depreciation on derivative transactions for the year ended Change in net unrealized depreciation on derivative transactions for the year ended Change in net unrealized appreciation on derivative transactions for the year ended Swaps Interest Rate Risk $ (5,002,305 ) $ (32,106 ) $ 65,371 $ (5,002,305 ) $ (32,106 ) $ 65,371 Risk Exposure Investment interest income from non-controlled, non-affiliated investments for the year ended Investment interest income from non-controlled, non-affiliated investments for the year ended Investment interest income from non-controlled, non-affiliated investments for the year ended Swaps Interest Rate Risk $ - $ 189,178 $ - $ - $ 189,178 $ - Risk Exposure Other expenses for the year ended Other expenses for the year ended Other expenses for the year ended Swaps Interest Rate Risk $ 229,731 $ - $ 111,831 $ 229,731 $ - $ 111,831 By using derivative instruments, the company is exposed to the counterparty's credit risk — the risk that derivative counterparties may not perform in accordance with the contractual provisions offset by the value of any collateral received. The company's exposure to credit risk associated with counterparty non-performance is limited to collateral posted and the unrealized gains inherent in such transactions that are recognized in the consolidated statement of assets and liabilities. The company minimizes counterparty credit risk through credit monitoring procedures and managing margin and collateral requirements, as appropriate. Regarding our investment in the Canadian Northern Lights Portfolio, we have foreign currency risk related to our revenue and operating expenses which are denominated in the Canadian Dollars as opposed to the U.S. Dollars.
Income Taxes	Income Taxes The LLC intends to operate so that it will qualify to be treated as a partnership for U.S. federal income tax purposes under the Internal Revenue Code. As such, it will not be subject to any U.S. federal and state income taxes. In any year, it is possible that the LLC will not meet the qualifying income exception and will not qualify to be treated as a partnership. If the LLC does not meet the qualifying income exception, the members would then be treated as stockholders in a corporation and the company would become taxable as a corporation for U.S. federal income tax purposes under the Internal Revenue Code. The LLC would be required to pay income tax at corporate rates on its net taxable income. Distributions to members from the LLC would constitute dividend income taxable to such members, to the extent of the company's earnings and profits and the payment of the distributions would not be deductible by the LLC. The LLC plans to conduct substantially all its operations through its wholly-owned subsidiary, GREC, which is a corporation that is subject to U.S. federal, state and local income taxes. Accordingly, most of its operations will be subject to U.S. federal, state and local income taxes. Income taxes are accounted for under the assets and liabilities method. Deferred tax assets and liabilities are recorded for the estimated future tax consequences attributable to differences between items that are recognized in the consolidated financial statements and tax returns in different years. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. For income tax benefits to be recognized including uncertain tax benefits, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. The amount recognized is measured as the largest amount of the benefit that is more likely than not to be realized upon ultimate settlement. A valuation allowance is established against net deferred tax assets if, based on the weight of available evidence, it is more likely than not that some or all of the net deferred tax assets will not be realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. Interest and penalties associated with income taxes, if any, will be recognized in general and administrative expense. The company does not consolidate its investments for financial statements, rather it accounts for its investments at fair value under the specialized accounting of ASC Topic 946. The tax attributes of the individual investments will be considered and incorporated in the company's fair value estimates for those investments. The amounts recognized in the consolidated financial statements for unrealized appreciation and depreciation will result in a difference between the consolidated financial statements and the cost basis of the assets for tax purposes. These differences will be recognized as deferred tax assets and liabilities. Generally, the entities that hold the company's investments will be included in the consolidated tax return of GREC and the differences between the amounts recognized for financial statement purposes and the tax return will be recognized as additional deferred tax assets and liabilities. The company follows the authoritative guidance on accounting for uncertainty in income taxes and concluded it has no material uncertain tax positions to be recognized at this time. The company assessed its tax positions for all open tax years as of December 31, 2019 for all U.S. federal and state tax jurisdictions for the years 2015 through 2019. The results of this assessment are included in the company's tax provision and deferred tax assets as of December 31, 2019.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In August 2018, the FASB issued ASU No. 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement", which modifies the disclosure requirements on fair value measurements. The new guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (fiscal 2020 for the company). Upon the effective date, certain provisions are to be applied prospectively, while others are to be applied retrospectively to all periods presented. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this ASU and delay adoption of the additional disclosures until their effective date. We are currently evaluating the impact of ASU 2018-03 on our consolidated financial statements and disclosures, but do not expect a material impact on our consolidated financial statements and disclosures.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Schedule of weighted average basic and diluted net increase in net assets	For the year ended For the year ended For the year ended Basic and diluted Net increase in net assets resulting from operations attributed to common members $ 29,297,441 $ 13,314,380 $ 11,330,663 Weighted average common shares outstanding 43,788,187 29,799,735 18,922,343 Net increase in net assets resulting from operations attributed to common members per share $ 0.67 $ 0.45 $ 0.60
Schedule of status of O&O costs	December 31, December 31, Total O&O Costs Incurred by the Advisor and Dealer Manager $ 9,822 $ 9,371 Amounts previously reimbursed to the Advisor/Dealer Manager by the company 9,822 9,106 Amounts payable to Advisor by the company - 19 Amounts of the contingent liability subject to payment by the company only upon adequate gross offering proceeds being raised - 246
Schedule of consolidated statements of assets and liabilities - value of derivative	Asset Derivatives Liability Derivatives Risk Exposure Consolidated Statement of Assets and Liabilities Location Fair Value Consolidated Statement of Assets and Liabilities Location Fair Value Swaps Interest Rate Risk Swap contracts, at fair value $ 21,223 Swap contracts, at fair value $ 4,899,566 $ 21,223 $ 4,899,566 Asset Derivatives Liability Derivatives Risk Exposure Consolidated Statement of Assets and Liabilities Location Fair Value Consolidated Statement of Assets and Liabilities Location Fair Value Swaps Interest Rate Risk Swap contracts, at fair value $ 435,603 Swap contracts, at fair value $ 311,641 $ 435,603 $ 311,641
Schedule of effect of derivative instruments on the consolidated statement of operations	The effect of derivative instruments on the Consolidated Statements of Operations Risk Exposure Change in net unrealized depreciation on derivative transactions for the year ended Change in net unrealized depreciation on derivative transactions for the year ended Change in net unrealized appreciation on derivative transactions for the year ended Swaps Interest Rate Risk $ (5,002,305 ) $ (32,106 ) $ 65,371 $ (5,002,305 ) $ (32,106 ) $ 65,371 Risk Exposure Investment interest income from non-controlled, non-affiliated investments for the year ended Investment interest income from non-controlled, non-affiliated investments for the year ended Investment interest income from non-controlled, non-affiliated investments for the year ended Swaps Interest Rate Risk $ - $ 189,178 $ - $ - $ 189,178 $ - Risk Exposure Other expenses for the year ended Other expenses for the year ended Other expenses for the year ended Swaps Interest Rate Risk $ 229,731 $ - $ 111,831 $ 229,731 $ - $ 111,831

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Schedule of composition of company's investments	Investments at Investments at Fair Value Biomass: Eagle Valley Biomass Portfolio $ 21,425,600 $ 21,425,600 4.5 % Subtotal $ 21,425,600 $ 21,425,600 4.5 % Commercial Solar: Conic Portfolio $ 12,077,823 $ 17,828,206 3.8 % East to West Solar Portfolio 39,109,190 41,214,191 8.7 Foresight Solar Portfolio 13,790,000 14,965,339 3.1 Golden Horizons Solar Portfolio 9,290,000 15,132,017 3.2 Green Maple Portfolio 26,561,596 27,268,058 5.7 Longleaf Portfolio 22,797,404 24,605,536 5.2 Magnolia Sun Portfolio 10,775,000 6,460,457 1.4 Midway III Solar Portfolio 10,575,394 11,475,652 2.4 Six States Solar Portfolio 12,655,306 12,799,005 2.6 Sunny Mountain Portfolio 884,578 743,768 0.2 Subtotal $ 158,516,291 $ 172,492,229 36.3 % Residential Solar: Canadian Northern Lights Portfolio $ 1,603,136 $ 1,611,955 0.3 % Greenbacker Residential Solar Portfolio 28,100,000 32,540,979 6.9 Greenbacker Residential Solar Portfolio II 6,400,000 13,279,521 2.8 Subtotal $ 36,103,136 $ 47,432,455 10.0 % Wind: Greenbacker Wind Portfolio – California $ 9,500,000 $ 8,777,056 1.8 % Greenbacker Wind Portfolio - HoldCo 25,753,111 35,089,021 7.4 Greenbacker Wind Portfolio - Iowa 20,440,000 20,440,000 4.3 Greenbacker Wind Portfolio - Massachusetts 10,169,079 10,902,726 2.3 Greenbacker Wind Portfolio - Montana 24,756,684 26,451,773 5.6 Subtotal $ 90,618,874 $ 101,660,576 21.4 % Pre-Operational Assets: Citrine Solar Portfolio $ 3,411,249 $ 3,411,249 0.7 % Colorado CES Portfolio 4,517,354 4,517,354 1.0 Electric City Portfolio 4,208,484 4,208,484 0.9 Omni Portfolio 17,900,298 17,900,298 3.8 Opal Portfolio 344,949 344,949 0.1 Oregon Sun Portfolio 5,404,787 5,404,787 1.1 Phoenix Solar Portfolio 4,051,138 4,051,138 0.8 SE Solar Portfolio 5,000,000 5,000,000 1.1 Trillium Portfolio 24,277,396 24,277,396 5.0 Turquoise Solar Portfolio 26,602,532 26,602,532 5.6 Subtotal $ 95,718,187 $ 95,718,187 20.1 % Other Investments: Other Portfolios $ 12,656,710 $ 12,473,975 2.6 % Subtotal $ 12,656,710 $ 12,473,975 2.6 % Energy Efficiency: GREC Energy Efficiency Portfolio $ 388,044 $ 390,019 0.1 % Renew AEC One, LLC 479,140 479,140 0.1 Subtotal $ 867,184 $ 869,159 0.2 % Secured Loans Encore Loan $ 5,000,680 $ 5,000,680 1.1 % Hudson Loan 9,481,127 9,481,127 2.0 New Market Loan 5,000,000 5,000,000 1.1 SE Solar Loan 1,000,000 1,000,000 0.2 TUUSSO Loan 2,621,883 2,621,883 0.5 Subtotal $ 23,103,690 $ 23,103,690 4.9 % Total $ 439,009,672 $ 475,175,871 100.0 %
Schedule of investments by geographic region	Investments at Investments at Fair Value United States: East Region $ 123,146,232 $ 130,572,650 27.4 % Mid-West Region 49,208,021 55,455,982 11.7 % Mountain Region 79,975,330 87,711,362 18.5 % South Region 91,932,394 93,441,062 19.7 % West Region 92,944,559 106,382,860 22.4 % Total United States: $ 437,406,536 $ 473,563,916 99.7 % Canada: 1,603,136 1,611,955 0.3 % Total $ 439,009,672 $ 475,175,871 100.0 % Investments at Investments at Fair Value United States: East Region $ 65,082,005 $ 67,541,264 22.0 % Mid-West Region 1,796,801 1,846,346 0.6 Mountain Region 69,619,383 69,553,178 22.6 South Region 98,476,770 95,332,608 31.0 West Region 61,736,290 70,821,165 23.1 Total United States $ 296,711,249 $ 305,094,561 99.3 % Canada: 1,603,136 2,081,554 0.7 Total $ 298,314,385 $ 307,176,115 100.0 %
Schedule of investments by industry	Investments at Investments at Fair Value Biomass $ 21,425,600 $ 21,425,600 4.5 % Commercial Solar* 181,619,981 195,595,919 41.2 Residential Solar 36,103,136 47,432,455 10.0 Wind 90,618,874 101,660,576 21.4 Pre-Operational Assets 95,718,187 95,718,187 20.1 Other Investments 12,656,710 12,473,975 2.6 Energy Efficiency 867,184 869,159 0.2 Total $ 439,009,672 $ 475,175,871 100.0 % * Includes loans in the amount of $23,103,690. Investments at Investments at Fair Value Commercial Solar $ 144,732,656 $ 147,571,531 48.1 % Residential Solar 37,503,136 41,918,094 13.6 Wind 63,446,680 65,165,744 21.2 Pre-Operational Assets 50,353,115 50,235,080 16.3 Other Investments 1,279,273 1,263,620 0.4 Energy Efficiency 999,525 1,022,046 0.4 Total $ 298,314,385 $ 307,176,115 100.0 %

Fair Value Measurements - Inv_2

Fair Value Measurements - Investments (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of fair value measurements of investments, by major class	Valuation Inputs Level 1 Level 2 Level 3 Fair Value Limited Liability Company Member Interests $ - $ - $ 449,981,086 $ 449,981,086 Capital Stock - - 1,611,955 1,611,955 Energy Efficiency Secured Loans - - 479,140 479,140 Secured Loans – Other - - 23,103,690 23,103,690 Total $ - $ - $ 475,175,871 $ 475,175,871 Other Financial Instruments* Open swap contracts- assets $ - $ 21,223 $ - $ 21,223 Open swap contracts- liabilities - (4,899,566 ) - (4,899,566 ) Total $ - $ (4,878,343 ) $ - $ (4,878,343 ) * Other financial instruments are derivatives, such as futures, forward currency contracts and swaps. These instruments are reflected at the unrealized appreciation (depreciation) on the instrument. Valuation Inputs Level 1 Level 2 Level 3 Fair Value Limited Liability Company Member Interests $ — $ — $ 304,542,921 $ 304,542,921 Capital Stock — — 2,081,554 2,081,554 Energy Efficiency Secured Loans — — 551,640 551,640 Total $ — $ — $ 307,176,115 $ 307,176,115 Other Financial Instruments* Open swap contracts- assets $ — $ 435,603 $ — $ 435,603 Open swap contracts- liabilities $ — $ (311,641 ) $ — $ (311,641 ) Total $ — $ 123,962 $ — $ 123,962 * Other financial instruments are derivatives, such as futures, forward currency contracts and swaps. These instruments are reflected at the unrealized appreciation (depreciation) on the instrument.
Schedule of reconciliation of beginning and ending balances for investments and secured borrowings	The following table provides a reconciliation of the beginning and ending balances for investments that use Level 3 inputs for the year ended December 31, 2019: Balance Net change Translation Purchases Cost Sales and Net realized Balance Limited Liability Company Member Interests $ 304,542,921 $ 27,774,068 $ - $ 314,175,394 $ (159,495,169 ) $ (49,931,866 ) $ 12,915,738 $ 449,981,086 Capital Stock 2,081,554 (477,188 ) 7,589 - - - - 1,611,955 Energy Efficiency - Secured Loans 551,640 - - - - (72,500 ) - 479,140 Secured Loans - Other - - - 39,410,466 (2,056,776 ) (14,250,000 ) - 23,103,690 Total $ 307,176,115 $ 27,296,880 $ 7,589 $ 353,585,860 $ (161,551,945 ) $ (64,254,366 ) $ 12,915,738 $ 475,175,871 (1) Includes paid-in-kind interest, return of capital and additional investments in existing investments, if any. (2) Includes principal repayments on loans. The following table provides a reconciliation of the beginning and ending balances for investments that use Level 3 inputs for the year ended December 31, 2018: Balance Net change in unrealized appreciation on investments Translation of assets and liabilities denominated in foreign currencies Purchases Cost adjustments (1) Sales and Repayments of investments (2) Net realized gain on investments Balance Limited Liability Company Member Interests $ 215,619,476 $ 2,848,856 $ - $ 135,141,381 $ (44,566,792 ) $ (4,500,000 ) $ - $ 304,542,921 Capital Stock 2,093,827 106,223 (118,496 ) - - - - 2,081,554 Energy Efficiency - Secured Loans 672,871 - - - - (121,231 ) - 551,640 Total $ 218,386,174 $ 2,955,079 $ (118,496 ) $ 135,141,381 $ (44,566,792 ) $ (4,621,231 ) $ - $ 307,176,115 (1) Includes paid-in-kind interest, return of capital and additional investments in existing investments, if any. (2) Includes principal repayments on loans. The following table provides a reconciliation of the beginning and ending balances for investments that use Level 3 inputs for the year ended December 31, 2017: Balance as of December 31, Net change in unrealized appreciation on investments Translation of assets and liabilities denominated in foreign currencies Purchases Cost adjustments (1) Sales and Repayments of investments (2) Net realized gain on investments Balance as of December 31, Limited Liability Company Member Interests $ 112,536,561 $ 5,748,138 $ - $ 127,069,013 $ (30,412 ) $ (30,397,706 ) $ 693,882 $ 215,619,476 Capital Stock 1,815,169 180,895 97,763 - - - - 2,093,827 Energy Efficiency - Secured Loans 771,371 - - - - (98,500 ) - 672,871 Total $ 115,123,101 $ 5,929,033 $ 97,763 $ 127,069,013 $ (30,412 ) $ (30,496,206 ) $ 693,882 $ 218,386,174 (1) Includes purchases of new investments, capitalized deal costs, effects of purchase price adjustments, paid-in-kind interest, return of capital and additional investments in existing investments, if any. (2) Includes principal repayments on loans. The total change in unrealized appreciation included in the consolidated statements of operations within net change in unrealized appreciation on investments and foreign currency translation for the year ended December 31, 2017 attributable to Level 3 investments still held at December 31, 2017 was $6,026,796. Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in or out of the Level 3 as of the beginning of the period which the reclassifications occur. There were no reclassifications attributable to Level 3 investments during the year ended December 31, 2017. The total net change in unrealized appreciation at fair value for the year ended 31, 2017 was $6,092,167.
Schedule of quantitative information about level 3 fair value measurements	As of December 31, 2019, all of the company's portfolio investments utilized Level 3 inputs. The following table presents the quantitative information about Level 3 fair value measurements of the company's investments as of December 31, 2019: Fair Value Valuation Techniques Unobservable Inputs Rates/Assumptions Biomass $ 21,425,600 Transaction Cost Not Applicable Not Applicable Commercial Solar $ 172,492,229 Income Approach and Market Approach Discount rate, future kWh Production, and estimated remaining useful life 7.25% - 9.25%, 0.50% annual degradation in production, 13.5 - 34.3 years Residential Solar $ 47,432,455 Income Approach and Market Approach Discount rate, future kWh Production, and estimated remaining useful life 7.25% - 9.25%, 0.50% annual degradation in production, 13.5 - 34.3 years Wind $ 101,660,576 Income Approach Discount rate, future kWh Production, and estimated remaining useful life 8.50%, no annual degradation in production, 27.9 - 29.0 years Pre-Operational Assets $ 95,718,187 Transaction Cost Not Applicable Not Applicable Other Investments $ 12,473,975 Transaction Cost Not Applicable Not Applicable Energy Efficiency $ 869,159 Income and Collateral Based Approach Income Based Market yields 10.25% - 20.40% Secured Loans $ 23,103,690 Yield Analysis Market yields 8% - 10% As of December 31, 2018, all of the company's portfolio investments utilized Level 3 inputs. The following table presents the quantitative information about Level 3 fair value measurements of the company's investments as of December 31, 2018: Fair Value Valuation Techniques Unobservable Inputs Rates/Assumptions Commercial Solar $ 147,571,531 Income approach Discount rate, future kWh Production, and estimated remaining useful life 7.75% - 8.50%, 0.50% annual degradation in production, 22.2 - 35 years Residential Solar $ 41,918,094 Income approach Discount rate, future kWh Production, and estimated remaining useful life 7.25% - 11%, 0.50% annual degradation in production, 12.2 - 33 years Wind $ 65,165,744 Income approach Discount rate, future kWh Production, and estimated remaining useful life 8.50%, no annual degradation in production, 24 - 27.7 years Pre-Operational Assets $ 50,235,080 Transaction cost Not Applicable Not Applicable Other Investments $ 1,263,620 Transaction cost Not Applicable Not Applicable Energy Efficiency $ 1,022,046 Income and collateral based approach Income Based 10.25% - 20.40%

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of outstanding debt	December 31, 2019 December 31, 2018 Aggregate Principal Amount Available Principal Amount Outstanding Carrying Value Deferred Financing Costs Term Note Payable, Net of Financing Costs Aggregate Principal Amount Available Principal Amount Outstanding Carrying Value Deferred Financing Costs Term Note Payable, Net of Financing Costs New Facility $ 96,438,316 $ 71,990,467 $ 71,990,467 $ 3,103,681 $ 68,886,785 $ 60,000,000 $ 30,665,460 $ 30,665,460 $ 1,138,414 $ 29,527,046 Total $ 96,438,316 $ 71,990,467 $ 71,990,467 $ 3,103,681 $ 68,886,785 $ 60,000,000 $ 30,665,460 $ 30,665,460 $ 1,138,414 $ 29,527,046
Schedule of weighted average outstanding debt balance for credit facility	For the year Ended Credit Facility commitment fee $ 43,087 Credit Facility Loan interest 1,360,409 Amortization of deferred financing costs 226,742 Other* 1,182,564 Total $ 2,812,802 Weighted average interest rate on credit facility 4.32 % Weighted average outstanding balance of credit facility $ 53,753,277 * Primarily includes financing costs of credit facility. For the year Ended Credit Facility commitment fee $ 42,615 Credit Facility Loan interest 1,219,237 Amortization of deferred financing costs 222,394 Other* 309,588 Total $ 1,793,834 Weighted average interest rate on credit facility 4.14 % Weighted average outstanding balance of credit facility $ 29,896,416 * Primarily includes financing costs of credit facility. For the year Ended Revolver interest $ 288,620 Revolver commitment fee 81,109 Credit Facility Loan interest 157,811 Amortization of deferred financing costs 164,725 Total 692,265 Weighted average interest rate on credit facility. 4.87 % Weighted average outstanding balance of credit facility $ 8,481,848
Schedule of principal payments due on borrowings	Year ending December 31: Principal Payments 2020 $ 4,393,296 2021 5,659,278 2022 5,549,332 2023 5,630,052 2024 5,805,094 Thereafter 44,953,415 $ 71,990,467

Members' Equity (Tables)

Members' Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Schedule of shares issued and outstanding	Shares Outstanding as of Shares Issued During the Period Shares Repurchased During the Period Shares Outstanding as of Class A shares 16,714,738 1,053,857 (558,579 ) 17,210,016 Class C shares 2,222,478 512,926 (16,929 ) 2,718,475 Class I shares 6,209,416 670,113 (185,871 ) 6,693,658 Class P-A shares 15,478 2,631 - 18,109 Class P-I shares 11,841,392 9,631,641 (223,681 ) 21,249,352 Total 37,003,502 11,871,168 (985,060 ) 47,889,610 Shares Outstanding as of Shares Issued During the Period Shares Repurchased During the Period Shares Outstanding as of Class A shares 13,857,830 3,279,887 (422,979 ) 16,714,738 Class C shares 1,431,999 798,080 (7,601 ) 2,222,478 Class I shares 4,511,832 1,757,365 (59,781 ) 6,209,416 Class P-A shares — 15,478 — 15,478 Class P-I shares 3,387,568 8,469,305 (15,481 ) 11,841,392 Total 23,189,229 14,320,115 (505,842 ) 37,003,502
Schedule of reinvestment of distributions	Class A Class C Class I Class P-A Class P-I Total For the year ended December 31, 2019 Proceeds from Shares Sold $ 5,256,053 $ 3,651,717 $ 3,773,270 $ 22,875 $ 84,637,482 $ 97,341,397 Proceeds from Shares Issued through Reinvestment of Distributions $ 3,944,111 $ 733,788 $ 2,074,778 $ - $ - $ 6,752,677 For the year ended December 31, 2018 Proceeds from Shares Sold $ 25,178,267 $ 6,378,209 $ 13,706,626 $ 135,375 $ 74,928,595 $ 120,327,072 Proceeds from Shares Issued through Reinvestment of Distributions $ 3,815,909 $ 487,570 $ 1,823,310 $ - $ - $ 6,126,789 For the year ended December 31, 2017 Proceeds from Shares Sold $ 26,852,433 $ 3,102,082 $ 15,071,499 $ 27,075 $ 27,366,718 $ 72,419,807 Proceeds from Shares Issued through Reinvestment of Distributions $ 3,127,873 $ 363,670 $ 1,255,991 $ - $ - $ 4,747,534

Distributions (Tables)

Distributions (Tables)	12 Months Ended
	Dec. 31, 2019
Distributions Made to Members or Limited Partners [Abstract]
Schedule of the company declares distributions on each outstanding class A, C, I, P-A and P-I share	Class of Share Distribution Period A C I P-A P-I 1-Nov-15 31-Jan-16 $ 0.00164780 $ 0.00164780 $ 0.00164780 — — 1-Feb-16 30-Apr-16 $ 0.00165510 $ 0.00165510 $ 0.00165510 — — 1-May-16 31-Jul-16 $ 0.00166170 $ 0.00166170 $ 0.00166170 $ 0.00158260 $ 0.00158260 1-Aug-16 31-Oct-16 $ 0.00167660 $ 0.00167660 $ 0.00167660 $ 0.00159680 $ 0.00159680 1-Nov-16 31-Jan-17 $ 0.00168560 $ 0.00164020 $ 0.00168560 $ 0.00160360 $ 0.00160360 1-Feb-17 31-Apr-17 $ 0.00168070 $ 0.00163500 $ 0.00168070 $ 0.00159520 $ 0.00159520 1-May-17 31-Jul-17 $ 0.00167100 $ 0.00162730 $ 0.00167100 $ 0.00159520 $ 0.00158280 1-Aug-17 31-Oct-17 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00159010 1-Nov-17 31-Jan-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00158280 1-Feb-18 30-Apr-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00158280 1-May-18 31-Jul-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 — $ 0.00158280 1-Aug-18 31-Oct-18 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Nov-18 31-Jan-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Feb-19 30-Apr-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-May-19 31-Jul-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Aug-19 31-Oct-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280 1-Nov-19 31-Dec-19 $ 0.00166900 $ 0.00162650 $ 0.00166900 $ 0.00164790 $ 0.00158280
Schedule of distributions declared	Pay Date Paid in Cash Values of Shares Issued Under DRP Total February 1, 2019 $ 1,317,325 $ 583,571 $ 1,900,896 March 1, 2019 1,247,614 552,615 1,800,229 April 1, 2019 1,452,585 611,400 2,063,985 May 1, 2019 1,438,057 600,614 2,038,671 June 3, 2019 1,553,801 622,584 2,176,385 July 1, 2019 1,764,339 383,813 2,148,152 August 1, 2019 1,850,929 393,237 2,244,166 September 2, 2019 1,664,451 613,333 2,277,784 October 1, 2019 1,647,779 589,769 2,237,548 November 1, 2019 1,715,922 609,493 2,325,415 December 2, 2019 1,693,670 587,119 2,280,789 January 1, 2020 1,784,956 605,129 2,390,085 Total $ 19,131,428 $ 6,752,677 $ 25,884,105 The following table reflects the distributions declared during the year ended December 31, 2018. Pay Date Paid in Cash Value of Shares Issued under DRP Total February 1, 2018 $ 728,738 $ 464,821 $ 1,193,559 March 1, 2018 682,039 428,310 1,110,349 April 2, 2018 790,925 474,370 1,265,295 May 1, 2018 792,185 475,874 1,268,059 June 1, 2018 883,662 507,728 1,391,390 July 2, 2018 927,638 502,333 1,429,971 August 1, 2018 1,013,883 529,333 1,543,216 September 4, 2018 1,078,310 541,479 1,619,789 October 1, 2018 1,097,313 529,751 1,627,064 November 1, 2018 1,178,736 555,383 1,734,119 December 3, 2018 1,177,142 546,446 1,723,588 January 2, 2019 1,260,777 570,961 1,831,738 Total $ 11,611,348 $ 6,126,789 $ 17,738,137 The following table reflects the distributions declared during the year ended December 31, 2017. Pay Date Paid in Cash Value of Shares Issued under DRP Total February 1, 2017 $ 431,686 $ 349,842 $ 781,528 March 1, 2017 413,270 332,761 746,031 April 3, 2017 482,113 371,902 854,015 May 1, 2017 486,864 370,463 857,327 June 1, 2017 524,909 383,585 908,494 July 3, 2017 534,165 382,339 916,504 August 1, 2017 572,833 406,993 979,826 September 1, 2017 600,962 415,864 1,016,826 October 2, 2017 603,869 411,848 1,015,717 November 1, 2017 637,604 436,753 1,074,357 December 1, 2017 656,495 430,860 1,087,355 January 2, 2018 711,306 454,324 1,165,630 Total $ 6,656,076 $ 4,747,534 $ 11,403,610
Schedule of cash distributions paid	For the For the For the Cash from operations $ 4,088,660 $ 11,611,348 $ 6,656,075 Offering proceeds 15,042,768 — — Total cash distributions $ 19,131,428 $ 11,611,348 $ 6,656,075

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of income tax provision	Current Deferred Total Year ended December 31, 2019: US federal $ - $ 3,551,704 $ 3,551,704 State and local - (44,946 ) (44,946 ) Foreign jurisdiction - - - Tax (benefit) expense $ - $ 3,506,758 $ 3,506,758 Change in valuation allowance - 1,231,693 1,231,693 Deferred tax (benefit) expense - (3,188,431 ) (3,188,431 ) Change in benefit from deferred taxes on unrealized depreciation on investments - 7,926,882 7,926,882 Tax (benefit) expense, net $ - $ 4,738,451 $ 4,738,451 Current Deferred Total Year ended December 31, 2018: US federal $ - $ (1,218,349 ) $ (1,218,349 ) State and local - (254,810 ) (254,810 ) Foreign jurisdiction - - - Tax benefit/(expense) $ - $ (1,473,159 ) $ (1,473,159 ) Change in valuation allowance - (54,758 ) (54,758 ) Tax benefit/(expense), net $ - $ (1,527,917 ) $ (1,527,917 ) Current Deferred Total Year ended December 31, 2017: US federal $ - $ 1,289,202 $ 1,289,202 State and local - 273,787 273,787 Foreign jurisdiction - - - Tax (benefit) expense $ - $ 1,562,989 $ 1,562,989 Change in valuation allowance - 92,366 92,366 Tax benefit/(expense), net $ - $ 1,655,355 $ 1,655,355
Schedule of reconciliation between the federal statutory rate and the effective tax rate	2019 Percentage 2018 Percentage 2017 Percentage Net increase in net assets from operations before tax, based on ASC 946, at the federal income tax rate $ 7,125,202 150.37 % $ 2,523,711 (165.17 )% $ 2,793,488 168.75 % Add: Greenbacker Renewable Energy, LLC's loss treated as a partnership for U.S. tax purposes, at federal income tax rate $ 1,387,056 29.27 % $ 283,062 (18.53 )% $ 337,284 20.38 % Add: Greenbacker Renewable Energy Corporation's consolidated book (loss) based on standard GAAP accounting, at federal income tax rate $ (4,713,909 ) (99.48 )% $ (3,769,926 ) 246.74 % $ (2,225,352 ) (134.43 )% Federal tax credit $ (246,645 ) (5.21 )% $ (255,196 ) 16.70 % $ - - % Increase in income taxes resulting from: State and local taxes, net of federal benefit $ 969,124 20.45 % $ (270,036 ) 17.67 % $ 261,224 15.78 % Change in state rate $ (1,014,070 ) (21.40 )% $ 15,226 (1.00 )% $ 12,562 0.76 % Change in federal rate $ - - % $ - - % $ 383,783 23.18 % Change in valuation allowances $ 1,231,693 26.00 % $ (54,758 ) 3.59 % $ 92,366 5.58 % Actual provision for income taxes $ 4,738,451 100.00 % $ (1,527,917 ) 100.00 % $ 1,655,355 100.00 %
Schedule of deferred tax assets	2019 2018 Amortization 53,558 60,181 Net operating losses 27,935,648 21,289,433 Federal tax credits 7,046,772 5,756,076 Unrealized gains (32,223,751 ) (20,786,706 ) Deferred tax assets 2,812,227 $ 6,318,984 Less: valuation allowance (1,498,721 ) (267,027 ) Deferred tax assets, net 1,313,506 $ 6,051,957
Schedule of tax carryforwards	Expires Year Ending December 31, Federal NOL Amount Federal ITC Amount State ITC Amount State NOL Amount 2020 $ — $ — $ 802,822 — 2021 $ — $ — $ 422,885 $ — 2022 $ — $ — $ — $ 918,368 2023 $ — $ — $ — $ 2,454,562 2024 $ — $ — $ — $ 2,549,437 2025 $ — $ — $ — $ 673,181 2026 $ — $ — $ — $ 2,934,175 2027 $ — $ — $ — $ 4,162,481 2028 $ — $ — $ — $ 10,579,879 2029 $ — $ — $ — $ — 2030 $ — $ — $ — $ 2,751,775 2031 $ — $ — $ — $ 5,377,684 2032 $ — $ — $ — $ 8,015,544 2033 $ — $ — $ — $ 7,163,874 2034 $ 161,963 $ — $ — $ 156,188 2035 $ 6,693,198 $ 3,345,092 $ — $ 2,718,197 2036 $ 15,734,069 $ 1,955,780 $ — $ 5,911,423 2037 $ 26,927,165 $ — $ — $ 13,684,243 2038 $ 35,706,007 $ 273,548 $ — $ 18,592,693 2039 $ 20,866,683 $ 246,645 $ — $ — Indefinite $ — $ — $ — $ —

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2019
Financial Highlights [Abstract]
Schedule of financial highlights	For the year ended December 31, 2019 Class A Shares Class C Shares Class I Shares Class P-A Shares Class P-I Shares Per share data attributed to common shares (1) Net Asset Value at beginning of period $ 8.54 $ 8.34 $ 8.54 $ 8.55 $ 8.76 Net investment income (3) 0.17 0.17 0.17 0.17 0.17 Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder 0.80 0.80 0.80 0.80 0.80 Change in translation of assets and liabilities denominated in foreign currencies (4) - - - - - Change in benefit from deferred taxes on unrealized depreciation on investments (0.18 ) (0.18 ) (0.18 ) (0.18 ) (0.18 ) Net increase in net assets attributed to common stockholders 0.79 0.79 0.79 0. 79 0.79 Shareholder distributions: Distributions from net investment income (0.10 ) (0.10 ) (0.10 ) (0.10 ) (0.10 ) Distributions from offering proceeds (0.51 ) (0.50 ) (0.51 ) (0.51 ) (0.48 ) Offering costs and deferred sales commissions (0.02 ) (0.05 ) (0.02 ) - - Other (2) (0.14 ) (0.10 ) (0.13 ) (0.13 ) (0.07 ) Net decrease in members' equity attributed to common shares (0.77 ) (0.75 ) (0.76 ) (0.74 ) (0.65 ) Net asset value for common shares at end of period $ 8.56 $ 8.38 $ 8.56 $ 8.60 $ 8.90 Common members' equity at end of period $ 147,304,141 $ 22,792,345 $ 57,292,421 $ 155,802 $ 189,009,074 Common shares outstanding at end of period 17,210,016 2,718,475 6,693,658 18,109 21,249,352 Ratio/Supplemental data for common shares (annualized): Total return attributed to common shares based on net asset value 8.06 % 7.79 % 8.05 % 7.66 % 8.49 % Ratio of net investment income to average net assets 1.97 % 1.98 % 1.95 % 1.96 % 1.91 % Ratio of operating expenses to average net assets 3.94 % 3.96 % 3.90 % 3.92 % 3.81 % Portfolio turnover rate 14.04 % 14.04 % 14.04 % 14.04 % 14.04 % (1) The per share data for Class A, C, I, P-A and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2019, which were 17,270,555, 2,645,713, 6,642,314, 17,841, and 17,211,763, respectively. (2) Represents the impact of different share amounts used in calculating certain per share data based on weighted average shares outstanding during the period and the impact of shares at a price other than the net asset value. (3) Does not reflect any incentive fees that may be payable to the Special Unitholder. (4) Amount is less than $0.01 per share. The following is a schedule of financial highlights of the company attributed to Class A, C, I, P-A and P-I shares for the year ended December 31, 2018. For the year ended December 31, 2018 Class A Shares Class C Shares Class I Shares Class P-A Shares (5) Class P-I Shares Per share data attributed to common shares (1) Net Asset Value at beginning of period $ 8.68 $ 8.42 $ 8.68 $ 8.75 $ 8.81 Net investment income (3) 0.28 0.28 0.28 0.07 0.28 Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder 0.12 0.12 0.12 (0.05 ) 0.12 Change in translation of assets and liabilities denominated in foreign currencies (4) - - - - - Change in benefit from deferred taxes on unrealized depreciation on investments 0.08 0.08 0.08 0.12 0.08 Net increase in net assets attributed to common equityholders 0.48 0.48 0.48 0.14 0.48 Shareholder distributions: Distributions from net investment income (0.33 ) (0.33 ) (0.33 ) (0.08 ) (0.30 ) Distributions from offering proceeds (0.28 ) (0.26 ) (0.28 ) (0.14 ) (0.28 ) Offering costs and deferred sales commissions (0.03 ) (0.08 ) (0.04 ) (0.14 ) - Other (2) 0.02 0.11 0.03 0.02 0.05 Net decrease in members' equity attributed to common shares (0.62 ) (0.56 ) (0.62 ) (0.34 ) (0.53 ) Net asset value for common shares at end of period $ 8.54 $ 8.34 $ 8.54 $ 8.55 $ 8.76 Common shareholders' equity at end of period $ 142,791,899 $ 18,546,310 $ 53,046,260 $ 132,272 $ 103,742,870 Common shares outstanding at end of period 16,714,738 2,222,478 6,209,416 15,478 11,841,392 Ratio/Supplemental data for common shares (annualized): Total return attributed to common shares based on net asset value 5.45 % 6.19 % 5.44 % 1.06 % 6.16 % Ratio of net investment income to average net assets 3.24 % 3.26 % 3.20 % 1.97 % 2.86 % Ratio of operating expenses to average net assets 3.87 % 3.95 % 3.86 % 3.48 % 3.69 % Portfolio turnover rate 0.05 % 0.05 % 0.05 % 0.05 % 0.05 % (1) The per share data for Class A, C, I, P-A and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2018, which were 15,338,291, 1,803,985, 5,386,556, 11,042, and 7,266,426, respectively. (2) Represents the impact of different share amounts used in calculating certain per share data based on weighted average shares outstanding during the period and the impact of shares at a price other than the net asset value. (3) Does not reflect any incentive fees that may be payable to the Special Unitholder. (4) Amount is less than $0.01 per share. (5) Class P-A shares were reinstated for sale as of April 16, 2018 and first sold on August 6, 2018. The following is a schedule of financial highlights of the company attributed to Class A, C, I and P-I shares for the year ended December 31, 2017. For the year ended December 31, 2017 Class A Shares Class C Shares Class I Shares Class P-I Shares Per share data attributed to common shares (1) Net Asset Value at beginning of period $ 8.69 $ 8.44 $ 8.69 $ 8.67 Net investment income (3) 0.25 0.25 0.25 0.25 Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder 0.35 0.35 0.35 0.35 Change in translation of assets and liabilities denominated in foreign currencies (4) 0.01 0.01 0.01 0.01 Change in benefit from deferred taxes on unrealized depreciation on investments 0.05 0.05 0.05 0.05 Net increase in net assets attributed to common equityholders 0.66 0.66 0.66 0.66 Shareholder distributions: Distributions from net investment income (0.39 ) (0.39 ) (0.39 ) (0.39 ) Distributions from offering proceeds (0.22 ) (0.22 ) (0.21 ) (0.19 ) Offering costs and deferred sales commissions. (0.04 ) (0.15 ) (0.08 ) - Other (2) (0.02 ) 0.08 0.01 0.06 Net decrease in members' equity attributed to common shares (0.01 ) (0.02 ) (0.01 ) 0.14 Net asset value for common shares at end of period $ 8.68 $ 8.42 $ 8.68 $ 8.81 Common shareholders' equity at end of period $ 120,344,517 $ 12,053,349 $ 39,181,769 $ 29,858,889 Common shares outstanding at end of period 13,857,830 1,431,999 4,511,832 3,387,568 Ratio/Supplemental data for common shares (annualized): Total return attributed to common shares based on net asset value 6.90 % 6.77 % 6.90 % 8.65 % Ratio of net investment income to average net assets 2.96 % 3.04 % 2.96 % 2.92 % Ratio of operating expenses to average net assets. 3.64 % 3.74 % 3.64 % 3.59 % Portfolio turnover rate 19.15 % 19.15 % 19.15 % 19.15 % (1) The per share data for Class A, C, I and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2017, which were 12,384,101, 1,194,718, 3,529,998 and 1,792,632, respectively. (2) Represents the impact of different share amounts used in calculating certain per share data based on weighted average shares outstanding during the period and the impact of shares at a price other than the net asset value. (3) Does not reflect any incentive fees that may be payable to the Special Unitholder. (4) Amount is less than $0.01 per share.

Selected Quarterly Data (Unau_2

Selected Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule of unaudited quarterly financial information	For the quarter ended December 31, September 30, June 30, March 31, Total Investment income $ 4,640,954 $ 6,679,823 $ 4,876,003 $ 2,565,925 Net investment income $ 4,587,394 $ 2,067,331 $ 1,417,709 $ (795,343 ) Net gain(loss) on investments and foreign currency translation $ 5,248,381 $ 16,589,939 $ 6,098,299 $ 7,281,283 Change in (benefit) expense from deferred taxes on unrealized appreciation on investments $ (3,383,241 ) $ (2,463,723 ) $ (1,482,457 ) $ (597,461 ) Net increase (decrease) in net assets resulting from operations $ 6,452,534 $ 16,193,547 $ 6,033,551 $ 5,888,479 Net investment income (loss) per share - basic and diluted $ 0.10 $ 0.05 $ - $ (0.02 ) Net increase (decrease) in net assets resulting from operations per share - basic and diluted. $ 0.15 $ 0.36 $ 0.10 $ 0.15 Net asset value per share at period end (Class A) $ 8.60 $ 8.62 $ 8.48 $ 8.50 Net asset value per share at period end (Class C) $ 8.38 $ 8.44 $ 8.31 $ 8.32 Net asset value per share at period end (Class I) $ 8.60 $ 8.62 $ 8.48 $ 8.50 Net asset value per share at period end (Class P-A) $ 8.60 $ 8.65 $ 8.51 $ 8.53 Net asset value per share at period end (Class P-I) $ 8.90 $ 8.93 $ 8.77 $ 8.76 For the quarter ended December 31, September 30, June 30, March 31, Total Investment income $ 4,540,427 $ 5,103,336 $ 4,984,874 $ 4,918,793 Net investment income $ (434,963 ) $ 1,988,378 $ 3,259,425 $ 3,271,370 Net gain (loss) on investments and foreign currency translation $ (1,693,642 ) $ (296,054 ) $ 2,341,771 $ 2,452,402 Change in (benefit) expense from deferred taxes on unrealized appreciation on investments $ 1,877,386 $ 2,275,076 $ 73,354 $ (1,239,228 ) Net increase (decrease) in net assets resulting from operations $ (251,219 ) $ 3,967,400 $ 5,674,550 $ 4,484,544 Net investment income (loss) per share - basic and diluted $ (0.01 ) $ 0.06 $ 0.12 $ 0.13 Net increase (decrease) in net assets resulting from operations per share - basic and diluted $ (0.01 ) $ 0.12 $ 0.21 $ 0.19 Net asset value per share at period end (Class A) $ 8.54 $ 8.69 $ 8.72 $ 8.70 Net asset value per share at period end (Class C) $ 8.34 $ 8.48 $ 8.50 $ 8.45 Net asset value per share at period end (Class I) $ 8.54 $ 8.69 $ 8.72 $ 8.70 Net asset value per share at period end (Class P-A) $ 8.55 $ 8.71 $ — $ — Net asset value per share at period end (Class P-I) $ 8.76 $ 8.89 $ 8.90 $ 8.84 For the quarter ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total investment income $ 4,416,117 $ 3,663,635 $ 2,936,470 $ 2,366,899 Net investment income $ 229,297 $ 1,149,977 $ 1,986,899 $ 1,450,378 Net gain (loss) on investments and foreign currency translation $ 3,738,403 $ 1,579,619 $ 1,576,272 $ (108,245 ) Change in benefit (expense) from deferred taxes on unrealized appreciation on investments $ 1,198,186 $ 680,969 $ (653,366 ) $ (262,069 ) Net increase in net assets resulting from operations. $ 5,165,886 $ 3,410,565 $ 2,909,805 $ 1,080,064 Net investment income per share – basic and diluted. $ (0.01 ) $ 0.06 $ 0.11 $ 0.09 Net increase in net assets resulting from operations per share – basic and diluted. $ 0.22 $ 0.16 $ 0.15 $ 0.07 Net asset value per share at period end (Class A). $ 8.68 $ 8.64 $ 8.63 $ 8.64 Net asset value per share at period end (Class C). $ 8.42 $ 8.42 $ 8.41 $ 8.40 Net asset value per share at period end (Class I) $ 8.68 $ 8.64 $ 8.63 $ 8.64 Net asset value per share at period end (Class P-I). $ 8.81 $ 8.75 $ 8.73 $ 8.69 For the quarter ended December 31, 2016 September 30, 2016 June 30, 2016 March 31, 2016 Total investment income $ 2,848,655 $ 3,085,513 $ 1,645,291 $ 656,566 Net investment income $ 1,497,148 $ 1,730,438 $ 1,519,649 $ 23,132 Net gain (loss) on investments and foreign currency translation $ (1,706,876 ) $ 1,143,849 $ (231,426 ) $ (634,047 ) Change in benefit (expense) from deferred taxes on unrealized appreciation on investments $ 671,401 $ (8,372 ) $ 1,838,292 $ 1,885,335 Net increase in net assets resulting from operations $ 461,673 $ 2,865,915 $ 3,126,515 $ 1,274,420 Net investment income per share – basic and diluted $ 0.11 $ 0.14 $ 0.15 $ 0.00 Net increase in net assets resulting from operations per share – basic and diluted. $ 0.03 $ 0.24 $ 0.30 $ 0.16 Net asset value per share at period end (Class A) $ 8.69 $ 8.74 $ 8.69 $ 8.56 Net asset value per share at period end (Class C) $ 8.44 $ 8.49 $ 8.43 $ 8.56 Net asset value per share at period end (Class I) $ 8.69 $ 8.74 $ 8.69 $ 8.56 Net asset value per share at period end (Class P-A) $ 8.67 $ 8.74 $ - $ - Net asset value per share at period end (Class P-I) $ 8.67 $ 8.74 $ - $ - For the quarter ended December 31, 2015 September 30, 2015 June 30, 2015 March 31, 2015 Total investment income $ 421,488 $ 740,773 $ 633,646 $ 58,215 Net investment income (loss) $ 253,576 $ 270,523 $ 333,917 $ (118,483 ) Net gain (loss) on investments and foreign currency translation $ 666,498 $ 376,473 $ (46,396 ) $ 385,490 Change in benefit from deferred taxes on unrealized appreciation on investments $ 127,015 $ - $ - $ - Net increase in net assets resulting from operations $ 1,047,089 $ 646,996 $ 287,521 $ 267,007 Net investment income (loss) per share – basic and diluted $ 0.09 $ 0.07 $ 0.14 $ (0.08 ) Net increase in net assets resulting from operations per share – basic and diluted $ 0.20 $ 0.17 $ 0.12 $ 0.18 Net asset value per share at period end $ 8.54 $ 8.52 $ 8.50 $ 8.50

Organization and Operations o_2

Organization and Operations of the Company (Details Narrative) - USD ($)	Dec. 31, 2019	Jun. 04, 2019
Organization and Operations of the Company (Textual)
Offering a maximum shares of common stock		$ 10,000,000
Maximum [Member] | Limited Liability Company [Member]
Organization and Operations of the Company (Textual)
Dollar value of shares offering	$ 1,000,000,000
Maximum [Member] | Distribution Reinvestment Plan [Member]
Organization and Operations of the Company (Textual)
Dollar value of shares offering	$ 200,000,000

Significant Accounting Polici_4

Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic and diluted
Net increase in net assets resulting from operations attributed to common members	$ 29,297,441	$ 13,314,380	$ 11,330,663
Weighted average common shares outstanding	43,788,187	29,799,735	18,922,343
Net increase in net assets resulting from operations attributed to common members per share	$ 0.67	$ 0.45	$ 0.6

Significant Accounting Polici_5

Significant Accounting Policies (Details 1) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Amounts payable to Advisor by the company		$ 19,181
Advisor and Dealer Manager [Member]
Total O&O Costs Incurred by the Advisor and Dealer Manager	9,822	9,371
Amounts previously reimbursed to the Advisor/Dealer Manager by the company	9,822	9,106
Amounts payable to Advisor by the company		19
Amounts of the contingent liability subject to payment by the company only upon adequate gross offering proceeds being raised		$ 246

Significant Accounting Polici_6

Significant Accounting Policies (Details 2) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items]
Asset Derivatives	$ 21,223	$ 435,603
Liability Derivatives	4,899,566	311,641
Interest Rate Risk [Member] | Swap Contracts [Member]
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items]
Asset Derivatives	21,223	435,603
Liability Derivatives	$ 4,899,566	$ 311,641

Significant Accounting Polici_7

Significant Accounting Policies (Details 3) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in net unrealized appreciation on derivative transactions	$ (5,002,305)	$ (32,106)	$ 65,371
Investment interest income from non-controlled, non-affiliated investments		189,178
Other expenses	229,731		111,831
Interest Rate Risk [Member] | Swap Contracts [Member]
Change in net unrealized appreciation on derivative transactions	(5,002,305)	(32,106)	65,371
Investment interest income from non-controlled, non-affiliated investments		189,178
Other expenses	$ 229,731		$ 111,831

Significant Accounting Polici_8

Significant Accounting Policies (Details Narrative) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Capital gains incentive distribution allocation	$ 6,897,808	$ 1,797,138
Deferred sales commissions	56,483	$ 191,706
Average notional amount	$ 93,920,446
Greenbacker Capital Management LLC [Member]
Significant Accounting Policies (Textual)
Limit of offering costs reimbursement to advisor	15.00%
Percentage of reimbursement out of gross offering proceeds	15.00%
Organization and offering costs due to termination of registration statement	$ 9,400,000

Investments (Details)

Investments (Details) - USD ($)	Dec. 31, 2019		Dec. 31, 2018
Investment Holdings [Line Items]
Investments at Cost	$ 415,905,982		$ 298,314,385
Investments at Fair Value	$ 452,072,181		$ 307,176,115
Fair Value Percentage of Total Portfolio	100.00%		100.00%
Biomass [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 21,425,600
Investments at Fair Value	$ 21,425,600
Fair Value Percentage of Total Portfolio	4.50%
Biomass [Member] | Eagle Valley Biomass Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 21,425,600
Investments at Fair Value	$ 21,425,600
Fair Value Percentage of Total Portfolio	4.50%
Commercial Solar [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 158,516,291		$ 144,732,656
Investments at Fair Value	$ 172,492,229		$ 147,571,531
Fair Value Percentage of Total Portfolio	36.30%	[1]	48.10%
Commercial Solar [Member] | Conic Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 12,077,823
Investments at Fair Value	$ 17,828,206
Fair Value Percentage of Total Portfolio	3.80%
Commercial Solar [Member] | East To West Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 39,109,190		$ 37,079,887
Investments at Fair Value	$ 41,214,191		$ 33,665,088
Fair Value Percentage of Total Portfolio	8.70%		10.90%
Commercial Solar [Member] | Foresight Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 13,790,000		$ 13,650,000
Investments at Fair Value	$ 14,965,339		$ 14,357,201
Fair Value Percentage of Total Portfolio	3.10%		4.70%
Commercial Solar [Member] | Golden Horizons Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 9,290,000		$ 9,400,000
Investments at Fair Value	$ 15,132,017		$ 14,445,071
Fair Value Percentage of Total Portfolio	3.20%		4.70%
Commercial Solar [Member] | Green Maple Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 26,561,596		$ 17,582,823
Investments at Fair Value	$ 27,268,058		$ 16,066,837
Fair Value Percentage of Total Portfolio	5.70%		5.20%
Commercial Solar [Member] | Longleaf Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 22,797,404
Investments at Fair Value	$ 24,605,536
Fair Value Percentage of Total Portfolio	5.20%
Commercial Solar [Member] | Magnolia Sun Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 10,775,000		$ 10,775,000
Investments at Fair Value	$ 6,460,457		$ 8,258,786
Fair Value Percentage of Total Portfolio	1.40%		2.70%
Commercial Solar [Member] | Midway III Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 10,575,394		$ 11,552,904
Investments at Fair Value	$ 11,475,652		$ 13,265,608
Fair Value Percentage of Total Portfolio	2.40%		4.30%
Commercial Solar [Member] | Six States Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 12,655,306		$ 12,470,306
Investments at Fair Value	$ 12,799,005		$ 13,440,025
Fair Value Percentage of Total Portfolio	2.60%		4.40%
Commercial Solar [Member] | Sunny Mountain Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 884,578		$ 884,578
Investments at Fair Value	$ 743,768		$ 1,107,041
Fair Value Percentage of Total Portfolio	0.20%		0.40%
Commercial Solar [Member] | Raleigh Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 20,822,198
Investments at Fair Value			$ 21,358,997
Fair Value Percentage of Total Portfolio			7.00%
Commercial Solar [Member] | Sun Farm Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 10,514,960
Investments at Fair Value			$ 11,606,877
Fair Value Percentage of Total Portfolio			3.80%
Residential Solar [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 36,103,136		$ 37,503,136
Investments at Fair Value	$ 47,432,455		$ 41,918,094
Fair Value Percentage of Total Portfolio	10.00%		13.60%
Residential Solar [Member] | Canadian Northern Lights Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 1,603,136
Investments at Fair Value	$ 1,611,955
Fair Value Percentage of Total Portfolio	3.00%
Residential Solar [Member] | Greenbacker Residential Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 28,100,000		$ 28,100,000
Investments at Fair Value	$ 32,540,979		$ 27,372,253
Fair Value Percentage of Total Portfolio	6.90%		8.90%
Residential Solar [Member] | Greenbacker Residential Solar Portfolio II [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 6,400,000		$ 6,400,000
Investments at Fair Value	$ 13,279,521		$ 10,763,559
Fair Value Percentage of Total Portfolio	2.80%		3.50%
Residential Solar [Member] | Canadian Mountain Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 1,603,136
Investments at Fair Value			$ 2,081,554
Fair Value Percentage of Total Portfolio			0.60%
Residential Solar [Member] | Enfinity Colorado DHA Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 1,400,000
Investments at Fair Value			$ 1,700,728
Fair Value Percentage of Total Portfolio			0.60%
Wind [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 90,618,874		$ 63,446,680
Investments at Fair Value	$ 101,660,576		$ 65,165,744
Fair Value Percentage of Total Portfolio	21.40%		21.20%
Wind [Member] | Greenbacker Wind Portfolio - California [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 9,500,000		$ 9,500,000
Investments at Fair Value	$ 8,777,056		$ 8,070,745
Fair Value Percentage of Total Portfolio	1.80%		2.60%
Wind [Member] | Greenbacker Wind Portfolio - HoldCo [member]
Investment Holdings [Line Items]
Investments at Cost	$ 25,753,111
Investments at Fair Value	$ 35,089,021
Fair Value Percentage of Total Portfolio	7.40%
Wind [Member] | Greenbacker Wind Portfolio - Iowa [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 20,440,000
Investments at Fair Value	$ 20,440,000
Fair Value Percentage of Total Portfolio	4.30%
Wind [Member] | Greenbacker Wind Portfolio - Massachusetts [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 10,169,079
Investments at Fair Value	$ 10,902,726
Fair Value Percentage of Total Portfolio	2.30%
Wind [Member] | Greenbacker Wind Portfolio - Montana [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 24,756,684		$ 21,709,487
Investments at Fair Value	$ 26,451,773		$ 21,956,868
Fair Value Percentage of Total Portfolio	5.60%		7.10%
Wind [Member] | Greenbacker Wind Portfolio - Idaho [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 7,320,000
Investments at Fair Value			$ 6,385,631
Fair Value Percentage of Total Portfolio			2.10%
Wind [Member] | Greenbacker Wind Portfolio - Vermont [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 24,917,193
Investments at Fair Value			$ 28,752,500
Fair Value Percentage of Total Portfolio			9.40%
Pre-Operational Assets [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 95,718,187		$ 50,353,115
Investments at Fair Value	$ 95,718,187		$ 50,235,080
Fair Value Percentage of Total Portfolio	20.10%		16.30%
Pre-Operational Assets [Member] | Citrine Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 3,411,249
Investments at Fair Value	$ 3,411,249
Fair Value Percentage of Total Portfolio	0.70%
Pre-Operational Assets [Member] | Colorado CES Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 4,517,354
Investments at Fair Value	$ 4,517,354
Fair Value Percentage of Total Portfolio	100.00%
Pre-Operational Assets [Member] | Electric City Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 4,208,484
Investments at Fair Value	$ 4,208,484
Fair Value Percentage of Total Portfolio	0.90%
Pre-Operational Assets [Member] | Omni Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 17,900,298
Investments at Fair Value	$ 17,900,298
Fair Value Percentage of Total Portfolio	3.80%
Pre-Operational Assets [Member] | Opal Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 344,949
Investments at Fair Value	$ 344,949
Fair Value Percentage of Total Portfolio	0.10%
Pre-Operational Assets [Member] | Oregon Sun Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 5,404,787
Investments at Fair Value	$ 5,404,787
Fair Value Percentage of Total Portfolio	1.10%
Pre-Operational Assets [Member] | Phoenix Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 4,051,138		$ 9,964,515
Investments at Fair Value	$ 4,051,138		$ 9,964,515
Fair Value Percentage of Total Portfolio	0.80%		3.20%
Pre-Operational Assets [Member] | SE Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 7,178,207
Investments at Fair Value			$ 7,178,207
Fair Value Percentage of Total Portfolio			2.30%
Pre-Operational Assets [Member] | Trillium Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 24,277,396
Investments at Fair Value	$ 24,277,396
Fair Value Percentage of Total Portfolio	5.00%
Pre-Operational Assets [Member] | Turquoise Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 26,602,532		$ 5,877,188
Investments at Fair Value	$ 26,602,532		$ 5,877,188
Fair Value Percentage of Total Portfolio	5.60%		1.90%
Pre-Operational Assets [Member] | Colorado CSG Solar Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost			$ 27,333,205
Investments at Fair Value			$ 27,215,170
Fair Value Percentage of Total Portfolio			8.90%
Pre-Operational Assets [Member] | SE Solar Portfolio 2019 [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 5,000,000
Investments at Fair Value	$ 5,000,000
Fair Value Percentage of Total Portfolio	1.10%
Other Investments [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 12,656,710
Investments at Fair Value	$ 12,473,975
Fair Value Percentage of Total Portfolio	2.60%
Other Investments [Member] | Other Portfolios [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 12,656,710		$ 1,279,273
Investments at Fair Value	$ 12,473,975		$ 1,263,620
Fair Value Percentage of Total Portfolio	2.60%		0.40%
Energy Efficiency [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 867,184		$ 999,525
Investments at Fair Value	$ 869,159		$ 1,022,046
Fair Value Percentage of Total Portfolio	0.20%		0.40%
Energy Efficiency [Member] | GREC Energy Efficiency Portfolio [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 388,044		$ 447,885
Investments at Fair Value	$ 390,019		$ 470,406
Fair Value Percentage of Total Portfolio	0.10%		0.20%
Energy Efficiency [Member] | Renew AEC One, LLC [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 479,140		$ 551,640
Investments at Fair Value	$ 479,140		$ 551,640
Fair Value Percentage of Total Portfolio	0.10%		0.20%
Secured Loan [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 23,103,690
Investments at Fair Value	$ 23,103,690
Fair Value Percentage of Total Portfolio	4.90%
Secured Loan [Member] | Encore Loan [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 5,000,680
Investments at Fair Value	$ 5,000,680
Fair Value Percentage of Total Portfolio	1.10%
Secured Loan [Member] | Hudson Loan [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 9,481,127
Investments at Fair Value	$ 9,481,127
Fair Value Percentage of Total Portfolio	2.00%
Secured Loan [Member] | New Market Loan [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 5,000,000
Investments at Fair Value	$ 5,000,000
Fair Value Percentage of Total Portfolio	1.10%
Secured Loan [Member] | SE Solar Loan [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 1,000,000
Investments at Fair Value	$ 1,000,000
Fair Value Percentage of Total Portfolio	0.20%
Secured Loan [Member] | TUUSSO Loan [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 2,621,883
Investments at Fair Value	$ 2,621,883
Fair Value Percentage of Total Portfolio	0.50%
[1]	Includes loans in the amount of $23,103,690.

Investments (Details 1)

Investments (Details 1) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Investment Holdings [Line Items]
Investments at Cost	$ 415,905,982	$ 298,314,385
Investments at Fair Value	$ 452,072,181	$ 307,176,115
Fair Value Percentage of Total Portfolio	100.00%	100.00%
East Region [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 123,146,232	$ 65,082,005
Investments at Fair Value	$ 130,572,650	$ 67,541,264
Fair Value Percentage of Total Portfolio	27.40%	22.00%
Mid-West Region [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 49,208,021	$ 1,796,801
Investments at Fair Value	$ 55,455,982	$ 1,846,346
Fair Value Percentage of Total Portfolio	11.70%	0.60%
Mountain Region [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 79,975,330	$ 69,619,383
Investments at Fair Value	$ 87,711,362	$ 69,553,178
Fair Value Percentage of Total Portfolio	18.50%	22.60%
South Region [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 91,932,394	$ 98,476,770
Investments at Fair Value	$ 93,441,062	$ 95,332,608
Fair Value Percentage of Total Portfolio	19.70%	31.00%
West Region [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 92,944,559	$ 61,736,290
Investments at Fair Value	$ 106,382,860	$ 70,821,165
Fair Value Percentage of Total Portfolio	22.40%	23.10%
Total United States [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 437,406,536	$ 296,711,249
Investments at Fair Value	$ 473,563,916	$ 305,094,561
Fair Value Percentage of Total Portfolio	99.70%	99.30%
Canada [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 1,603,136	$ 1,603,136
Investments at Fair Value	$ 1,611,955	$ 2,081,554
Fair Value Percentage of Total Portfolio	0.30%	0.70%

Investments (Details 2)

Investments (Details 2) - USD ($)	Dec. 31, 2019		Dec. 31, 2018
Investment Holdings [Line Items]
Investments at Cost	$ 439,009,672		$ 298,314,385
Investments at Fair Value	$ 475,175,871		$ 307,176,115
Fair Value Percentage of Total Portfolio	100.00%		100.00%
Biomass [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 21,425,600
Investments at Fair Value	$ 21,425,600
Fair Value Percentage of Total Portfolio	4.50%
Commercial Solar [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 181,619,981	[1]	$ 144,732,656
Investments at Fair Value	$ 195,595,919	[1]	$ 147,571,531
Fair Value Percentage of Total Portfolio	36.30%	[1]	48.10%
Residential Solar [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 36,103,136		$ 37,503,136
Investments at Fair Value	$ 47,432,455		$ 41,918,094
Fair Value Percentage of Total Portfolio	10.00%		13.60%
Wind [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 90,618,874		$ 63,446,680
Investments at Fair Value	$ 101,660,576		$ 65,165,744
Fair Value Percentage of Total Portfolio	21.40%		21.20%
Pre-Operational Assets [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 95,718,187		$ 50,353,115
Investments at Fair Value	$ 95,718,187		$ 50,235,080
Fair Value Percentage of Total Portfolio	20.10%		16.30%
Other Investments [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 12,656,710		$ 1,279,273
Investments at Fair Value	$ 12,473,975		$ 1,263,620
Fair Value Percentage of Total Portfolio	2.60%		0.40%
Energy Efficiency [Member]
Investment Holdings [Line Items]
Investments at Cost	$ 867,184		$ 999,525
Investments at Fair Value	$ 869,159		$ 1,022,046
Fair Value Percentage of Total Portfolio	0.20%		0.40%
[1]	Includes loans in the amount of $23,103,690.

Investments (Details Narrative)

Investments (Details Narrative) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Investments (Textual)
Description of control investment	Investments held as of December 31, 2019 and 2018 are considered Control Investments, which are defined as investments in companies in which the company owns 25% or more of the voting securities of such company, have greater than 50% representation on such company's board of directors, or investments in limited liability companies for which the company serves managing member.	Investments held as of December 31, 2019 and 2018 are considered Control Investments, which are defined as investments in companies in which the company owns 25% or more of the voting securities of such company, have greater than 50% representation on such company's board of directors, or investments in limited liability companies for which the company serves managing member.
Loans in the amount	$ 23,103,690

Fair Value Measurements - Inv_3

Fair Value Measurements - Investments (Details) - USD ($)		Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		$ 475,175,871	$ 307,176,115
Unrealized appreciation and depreciation, Total	[1]	(4,878,343)	123,962
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Unrealized appreciation and depreciation, Total	[1]
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Unrealized appreciation and depreciation, Total	[1]	(4,878,343)	123,962
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		475,175,871	307,176,115
Unrealized appreciation and depreciation, Total	[1]
Limited Liability Company Member Interests [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		449,981,086	304,542,921
Limited Liability Company Member Interests [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Limited Liability Company Member Interests [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Limited Liability Company Member Interests [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		449,981,086	304,542,921
Secured Loans - Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		23,103,690
Secured Loans - Other [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Secured Loans - Other [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Secured Loans - Other [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		23,103,690
Capital Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		1,611,955	2,081,554
Capital Stock [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Capital Stock [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Capital Stock [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		1,611,955	2,081,554
Energy Efficiency Secured Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		479,140	551,640
Energy Efficiency Secured Loans [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Energy Efficiency Secured Loans [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total
Energy Efficiency Secured Loans [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements, Total		479,140	551,640
Open swap contracts- assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]	21,223	435,603
Open swap contracts- assets [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]
Open swap contracts- assets [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]	21,223	435,603
Open swap contracts- assets [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]
Open swap contracts- liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]	(4,899,566)	(311,641)
Open swap contracts- liabilities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]
Open swap contracts- liabilities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]	(4,899,566)	(311,641)
Open swap contracts- liabilities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized appreciation and depreciation, Total	[1]
[1]	Other financial instruments are derivatives, such as futures, forward currency contracts and swaps. These instruments are reflected at the unrealized appreciation (depreciation) on the instrument.

Fair Value Measurements - Inv_4

Fair Value Measurements - Investments (Details 1) - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		$ 307,176,115	$ 218,386,174	$ 115,123,101
Net change in unrealized appreciation on investments		27,296,880	2,955,079	5,929,033
Translation of assets and liabilities denominated in foreign currencies		7,589	(118,496)	97,763
Purchase		353,585,860	135,141,381	127,069,013
Cost adjustments	[1]	(161,551,945)	(44,566,792)	(30,412)
Sales and Repayments of investments	[2]	(64,254,366)	(4,621,231)	(30,496,206)
Net realized gain on investments		12,915,738		693,882
Ending Balance		475,175,871	307,176,115	218,386,174
Energy Efficiency - Secured Loans [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		551,640	672,871	771,371
Net change in unrealized appreciation on investments
Translation of assets and liabilities denominated in foreign currencies
Purchase
Cost adjustments	[1]
Sales and Repayments of investments	[2]		(121,231)	(98,500)
Net realized gain on investments
Ending Balance			551,640	672,871
Energy Efficiency - Secured Loans [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		551,640
Net change in unrealized appreciation on investments
Translation of assets and liabilities denominated in foreign currencies
Purchase
Cost adjustments	[1]
Sales and Repayments of investments	[2]	(72,500)
Net realized gain on investments
Ending Balance		479,140	551,640
Secured Loans - Other [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance
Net change in unrealized appreciation on investments
Translation of assets and liabilities denominated in foreign currencies
Purchase		39,410,466
Cost adjustments	[1]	(2,056,776)
Sales and Repayments of investments	[2]	(14,250,000)
Net realized gain on investments
Ending Balance		23,103,690
Capital Stock [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		2,081,554	2,093,827	1,815,169
Net change in unrealized appreciation on investments		(477,188)	106,223	180,895
Translation of assets and liabilities denominated in foreign currencies		7,589	(118,496)	97,763
Purchase
Cost adjustments	[1]
Sales and Repayments of investments	[2]
Net realized gain on investments
Ending Balance		1,611,955	2,081,554	2,093,827
Limited Liability Company Member Interests [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		304,542,921	215,619,476	112,536,561
Net change in unrealized appreciation on investments		27,774,068	2,848,856	5,748,138
Translation of assets and liabilities denominated in foreign currencies
Purchase		314,175,394	135,141,381	127,069,013
Cost adjustments	[1]	(159,495,169)	(44,566,792)	(30,412)
Sales and Repayments of investments	[2]	(49,931,866)	(4,500,000)	(30,397,706)
Net realized gain on investments		12,915,738		693,882
Ending Balance		$ 449,981,086	$ 304,542,921	$ 215,619,476
[1]	Includes paid-in-kind interest, return of capital and additional investments in existing investments, if any.
[2]	Includes principal repayments on loans.

Fair Value Measurements - Inv_5

Fair Value Measurements - Investments (Details 2) - Fair Value, Inputs, Level 3 [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Wind [Member]
Fair Value	$ 101,660,576	$ 65,165,744
Valuation Techniques	Income Approach	Income approach
Unobservable Inputs	Discount rate, future kWh Production, and estimated remaining useful life	Discount rate, future kWh Production, and estimated remaining useful life
Rates/Assumptions	8.50%, no annual degradation in production, 27.9 - 29.0 years	8.50%, no annual degradation in production, 24 - 27.7 years
Pre-Operational Assets [Member]
Fair Value	$ 95,718,187	$ 50,235,080
Valuation Techniques	Transaction Cost	Transaction cost
Unobservable Inputs	Not Applicable	Not Applicable
Rates/Assumptions	Not Applicable	Not Applicable
Other Investments [Member]
Fair Value	$ 12,473,975	$ 1,263,620
Valuation Techniques	Transaction Cost	Transaction cost
Unobservable Inputs	Not Applicable	Not Applicable
Rates/Assumptions	Not Applicable	Not Applicable
Energy Efficiency [Member]
Fair Value	$ 869,159	$ 1,022,046
Valuation Techniques	Income and Collateral Based Approach	Income and collateral based approach
Unobservable Inputs	Income Based Approach and Market yields	Income Based Approach and Market yields
Rates/Assumptions	10.25% - 20.40%	10.25% - 20.40%
Commercial Solar [Member]
Fair Value	$ 172,492,229	$ 147,571,531
Valuation Techniques	Income Approach and Market Approach	Income approach
Unobservable Inputs	Discount rate, future kWh Production, and estimated remaining useful life	Discount rate, future kWh Production, and estimated remaining useful life
Rates/Assumptions	7.25% - 9.25%, 0.50% annual degradation in production, 13.5 - 34.3 years	7.75% - 8.50%, 0.50% annual degradation in production, 22.2 - 35 years
Residential Solar [Member]
Fair Value	$ 47,432,455	$ 41,918,094
Valuation Techniques	Income Approach and Market Approach	Income approach
Unobservable Inputs	Discount rate, future kWh Production, and estimated remaining useful life	Discount rate, future kWh Production, and estimated remaining useful life
Rates/Assumptions	7.25% - 9.25%, 0.50% annual degradation in production, 13.5 - 34.3 years	7.25% - 11%, 0.50% annual degradation in production, 12.2 - 33 years
BioMass [Member]
Fair Value	$ 21,425,600
Valuation Techniques	Transaction Cost
Unobservable Inputs	Not Applicable
Rates/Assumptions	Not Applicable
Secured Loans [Member]
Fair Value	$ 23,103,690
Valuation Techniques	Yield Analysis
Unobservable Inputs	Market yields
Rates/Assumptions	8% - 10%

Fair Value Measurements - Inv_6

Fair Value Measurements - Investments (Details Narrative) - Fair Value, Inputs, Level 3 [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net change in unrealized appreciation on investments and foreign currency translation	$ 27,304,469	$ 2,836,583	$ 6,026,796
Fair value of unrealized depreciation	$ 22,302,164	$ 2,804,477	$ 6,092,167

Related Party Agreements and _2

Related Party Agreements and Transactions Agreements (Details Narrative) - USD ($)	Dec. 10, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Agreements and Transactions Agreements (Textual)
Management fees			$ 8,461,616	$ 5,803,893	$ 3,490,942
Increase (decrease) in incentive allocation expense					139,692
Payment for dealer manager fees			231,892	833,043	827,709
Selling commissions			594,247	2,438,486	2,444,282
Due to advisor				19,181
Net realized gain on investments			12,915,738		693,882
Gains incentive distribution			170,000		139,692
Net (increase) decrease in net assets attributed to special unitholder			$ (5,270,670)	(560,895)	(1,235,657)
Special Unitholder [Member]
Related Party Agreements and Transactions Agreements (Textual)
Hurdle rate, quarterly			1.75%
Hurdle rate, annualized			7.00%
Percentage of capital gains incentive distribution			20.00%
Percentage of liquidation incentive distribution			20.00%
Greenbacker Renewable Opportunity Zone Fund LLC [Member]
Related Party Agreements and Transactions Agreements (Textual)
Operating expense			$ 7,494,464
Amounts of transaction	$ 794,475	$ 16,874,761	17,175,554
Initial amount of transaction			1,500,000
Additional amount paid			8,184,393
Purchase price	$ 5,272,475
Receivable and included Investment sales			$ 2,741,476
Greenbacker Administration, LLC [Member]
Related Party Agreements and Transactions Agreements (Textual)
Percentage of reimbursement out of gross offering proceeds			15.00%
Base management fees payable, monthly rate			0.167%
Base management fees payable, annual rate			2.00%
Operating expense			$ 0	$ 0	$ 115,849
Percentage of offering expenses			3.80%
Proceeds gross offering amount			$ 9,400,000
Greenbacker Administration, LLC [Member] | Class A shares [Member]
Related Party Agreements and Transactions Agreements (Textual)
Shares issued			23,601	23,601
SC Distributors, LLC [Member] | Class C shares [Member]
Related Party Agreements and Transactions Agreements (Textual)
Description of distribution fee			With respect to Class C shares only, the company will pay the dealer manager a distribution fee that accrues daily in an amount equal to 1/365th of 0.80% of the amount of the net asset value for the Class C shares for such day on a continuous basis from year to year.
SC Distributors, LLC [Member] | Class C shares [Member] | Maximum [Member]
Related Party Agreements and Transactions Agreements (Textual)
Percentage of selling commision			3.00%
Percentage of dealer manager fees			2.75%
SC Distributors, LLC [Member] | Class A shares [Member] | Maximum [Member]
Related Party Agreements and Transactions Agreements (Textual)
Percentage of selling commision			7.00%
Percentage of dealer manager fees			2.75%
SC Distributors, LLC [Member] | Class P-A shares [Member] | Maximum [Member]
Related Party Agreements and Transactions Agreements (Textual)
Percentage of selling commision			6.00%
Percentage of dealer manager fees			2.50%
SC Distributors, LLC [Member] | Class I shares [Member] | Maximum [Member]
Related Party Agreements and Transactions Agreements (Textual)
Percentage of dealer manager fees			1.75%
Special Unitholder [Member] | Investment income exceeds the hurdle less than 2.1875% [Member]
Related Party Agreements and Transactions Agreements (Textual)
Hurdle rate, quarterly			8.75%
Hurdle rate, annualized			7.00%
Percentage of incentive distribution			20.00%
Special Unitholder [Member] | Investment income exceeds the hurdle rate less than 2.1875% quarterly [Member]
Related Party Agreements and Transactions Agreements (Textual)
Hurdle rate, quarterly			8.75%
Hurdle rate, annualized			7.00%
Percentage of incentive distribution			100.00%

Borrowings (Details)

Borrowings (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Aggregate Principal Amount Available	$ 96,438,316	$ 60,000,000
Principal Amount Outstanding	71,990,467	30,665,460
Carrying Value	71,990,467	30,665,460
Deferred Financing Costs	3,103,681	1,138,414
Term Note Payable, Net of Financing Costs	68,886,785	29,527,046
New Facility [Member]
Aggregate Principal Amount Available	96,438,316	60,000,000
Principal Amount Outstanding	71,990,467	30,665,460
Carrying Value	71,990,467	30,665,460
Deferred Financing Costs	3,103,681	1,138,414
Term Note Payable, Net of Financing Costs	$ 68,886,785	$ 29,527,046

Borrowings (Details 1)

Borrowings (Details 1) - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Credit Facility commitment fee		$ 43,087	$ 42,615	$ 288,620
Credit Facility Loan interest		1,360,409	1,219,237	81,109
Amortization of deferred financing costs		226,742	222,394	157,811
Other	[1]	1,182,564	309,588	164,725
Total		$ 2,812,802	$ 1,793,834	$ 692,265
Weighted average interest rate on credit facility		4.32%	4.14%	4.87%
Weighted average outstanding balance of credit facility		$ 53,753,277	$ 29,896,416	$ 8,481,848
[1]	Primarily includes financing costs of credit facility.

Borrowings (Details 2)

Borrowings (Details 2)	Dec. 31, 2019USD ($)
Year ending December 31:
2020	$ 4,393,296
2021	5,659,278
2022	5,549,332
2023	5,630,052
2024	5,805,094
Thereafter	44,953,415
Total	$ 71,990,467

Borrowings (Details Narrative)

Borrowings (Details Narrative) - USD ($)	Jun. 18, 2018	Jan. 05, 2018	Jun. 20, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 29, 2016
Borrowings (Textual)
Weighted average outstanding balance of credit facility				$ 53,753,277	$ 29,896,416	$ 8,481,848
Credit Agreement [Member] | GREC Entity Holdco LLC [Member] | New Credit Facility (the "Credit Facility") [Member]
Borrowings (Textual)
Maximum borrowing capacity		$ 60,000,000	$ 110,000,000
Description of interest rate terms			Loans made under the New Credit Facility bear interest at 1.75% in excess of the three-month LIBOR. Until the New Credit Facility converts to a term loan, quarterly commitment fees on the average daily unused portion of the Credit Facility are payable at a rate per annum of 0.50%.
Collateral amount		$ 25,700,000	$ 58,307,080	72,000,000
Credit facility maturity date		Jan. 5, 2024	Jun. 20, 2025
Financing costs				3,100,000
Available amount			$ 96,438,316
Credit Agreement [Member] | GREC Entity Holdco LLC [Member] | New Credit Facility (the "Credit Facility") [Member] | Minimum [Member]
Borrowings (Textual)
Maximum borrowing capacity				13,683,387
Interest Rate Swap Agreement[Member] | GREC Entity Holdco LLC [Member] | Facility 2 Term Loan [Member] | Interest Rate Swaps [Member]
Borrowings (Textual)
Description of interest rate terms	Floating rate interest payments
Interest swap	$ 20,920,650
Fixed swap rate	2.261%
Interest Rate Swap Agreement[Member] | GREC Entity Holdco LLC [Member] | Facility 5 Term Loan [Member] | Interest Rate Swaps [Member]
Borrowings (Textual)
Interest swap				$ 38,203,506
Fixed swap rate				2.69%
Interest Rate Swap Agreement[Member] | GREC Entity Holdco LLC [Member] | Facility 4 Term Loan [Member] | Interest Rate Swaps [Member]
Borrowings (Textual)
Interest swap				$ 4,180,063
Fixed swap rate				2.97%
Interest Rate Swap Agreement[Member] | GREC Entity Holdco LLC [Member] | Facility 3 Term Loan [Member] | Interest Rate Swaps [Member]
Borrowings (Textual)
Interest swap				$ 29,624,945
Fixed swap rate				2.65%
Interest Rate Swap Agreement[Member] | GREC Entity Holdco LLC [Member] | Facility 1 Term Loan [Member] | Interest Rate Swaps [Member]
Borrowings (Textual)
Interest swap							$ 4,300,000
Fixed swap rate							1.11%

Members' Equity (Details)

Members' Equity (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Shares Outstanding, Beginning	37,003,502	23,189,229
Shares Issued During the Period	11,871,168	14,320,115
Shares Repurchased During the Period	(985,060)	(505,842)
Shares Outstanding, Ending	47,889,610	37,003,502
Class A shares [Member]
Shares Outstanding, Beginning	16,714,738	13,857,830
Shares Issued During the Period	1,053,857	3,279,887
Shares Repurchased During the Period	(558,579)	(422,979)
Shares Outstanding, Ending	17,210,016	16,714,738
Class C shares [Member]
Shares Outstanding, Beginning	2,222,478	1,431,999
Shares Issued During the Period	512,926	798,080
Shares Repurchased During the Period	(16,929)	(7,601)
Shares Outstanding, Ending	2,718,475	2,222,478
Class I shares [Member]
Shares Outstanding, Beginning	6,209,416	4,511,832
Shares Issued During the Period	670,113	1,757,365
Shares Repurchased During the Period	(185,871)	(59,781)
Shares Outstanding, Ending	6,693,658	6,209,416
Class P-A shares [Member]
Shares Outstanding, Beginning	15,478
Shares Issued During the Period	2,631	15,478
Shares Repurchased During the Period
Shares Outstanding, Ending	18,109	15,478
Class P-I shares [Member]
Shares Outstanding, Beginning	11,841,392	3,387,568
Shares Issued During the Period	9,631,641	8,469,305
Shares Repurchased During the Period	(223,681)	(15,481)
Shares Outstanding, Ending	21,249,352	11,841,392

Members' Equity (Details 1)

Members' Equity (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Proceeds from Shares Sold	$ 97,341,397	$ 120,327,072	$ 72,419,807
Proceeds from Shares Issued through Reinvestment of Distributions	6,752,677	6,126,789	4,747,534
Class A shares [Member]
Proceeds from Shares Sold	5,256,053	25,178,267	26,852,433
Proceeds from Shares Issued through Reinvestment of Distributions	3,944,111	3,815,909	3,127,873
Class C shares [Member]
Proceeds from Shares Sold	3,651,717	6,378,209	3,102,082
Proceeds from Shares Issued through Reinvestment of Distributions	733,788	487,570	363,670
Class I shares [Member]
Proceeds from Shares Sold	3,773,270	13,706,626	15,071,499
Proceeds from Shares Issued through Reinvestment of Distributions	2,074,778	1,823,310	1,255,991
Class P-A shares [Member]
Proceeds from Shares Sold	22,875	135,375	27,075
Proceeds from Shares Issued through Reinvestment of Distributions
Class P-I shares [Member]
Proceeds from Shares Sold	84,637,482	74,928,595	27,366,718
Proceeds from Shares Issued through Reinvestment of Distributions

Members' Equity (Details Narrat

Members' Equity (Details Narrative) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 04, 2019	Dec. 31, 2015
Members' Equity (Textual)
Total number of shares authorized		400,000,000
Common stock of class A, C, I, P-A and P-I, shares authorized		350,000,000	350,000,000
Preferred stock, shares authorized		50,000,000	50,000,000
Description of share repurchase program	Quarterly share repurchases will be conducted, on up to approximately 5% of the weighted average number of outstanding shares in any 12-month period, to allow members who hold Class A, C, I, P-A (commencing as of April 16, 2018) or P-I shares (commencing as of October 1, 2017) to sell shares back to the company at a price equal to the then current offering price less the selling commissions and dealer manager fees associated with that class of shares.
Share repurchase program repurchase limit						5.00%
Share repurchase program repurchase limit in the prior four fiscal quarters		1.25%
Total purchase price		$ 8,522,390	$ 4,474,471	$ 4,147,698
Shareholder receivable		$ 650,000	$ 469,245
Class A shares [Member]
Members' Equity (Textual)
Shares issued under the DRP		1,588,435	1,131,099
Share repurchased		558,579	422,979	368,925
Total purchase price		$ 4,807,693	$ 3,743,387	$ 3,280,566
Class A shares [Member] | SC Distributors, LLC [Member] | Maximum [Member]
Members' Equity (Textual)
Percentage of selling commision		7.00%
Percentage of dealer manager fees		2.75%
Class C shares [Member]
Members' Equity (Textual)
Shares issued under the DRP		220,991	134,021
Share repurchased		16,929	7,601	6,041
Total purchase price		$ 142,110	$ 65,340	$ 53,073
Class C shares [Member] | SC Distributors, LLC [Member]
Members' Equity (Textual)
Description of distribution fee		With respect to Class C shares only, the company will pay the dealer manager a distribution fee that accrues daily in an amount equal to 1/365th of 0.80% of the amount of the net asset value for the Class C shares for such day on a continuous basis from year to year.
Class C shares [Member] | SC Distributors, LLC [Member] | Maximum [Member]
Members' Equity (Textual)
Percentage of selling commision		3.00%
Percentage of dealer manager fees		2.75%
Class I shares [Member]
Members' Equity (Textual)
Shares issued under the DRP		678,445	438,254
Share repurchased		185,871	59,781	81,315
Total purchase price		$ 1,596,905	$ 528,898	$ 724,059
Class I shares [Member] | SC Distributors, LLC [Member] | Maximum [Member]
Members' Equity (Textual)
Percentage of dealer manager fees		1.75%
Class P-I shares [Member]
Members' Equity (Textual)
Share repurchased		223,681	15,481	10,309
Total purchase price		$ 1,975,682	$ 136,845	$ 90,000
DRP [Member] | SC Distributors, LLC [Member] | Maximum [Member]
Members' Equity (Textual)
Percentage of selling commision		6.00%
Percentage of dealer manager fees		2.50%
Distribution Reinvestment Plan [Member]
Members' Equity (Textual)
Shares issued under the DRP		2,487,871	1,703,374
Minimum written notice period for termination		10 days
Share offering price					10,000,000

Distributions (Details)

Distributions (Details) - $ / shares	2 Months Ended		3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016
Common Class A [Member]
Cash distributions announced per unit and per day		$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00166900	$ 0.00167100	$ 0.00168070	$ 0.00168560	$ 0.00167660	$ 0.00166170	$ 0.00165510	$ 0.00164780
Common Class C [Member]
Cash distributions announced per unit and per day	$ 0.00162650		0.00162650	0.00162650	0.00162650	0.00162650	0.00162650	0.00162650	0.00162650	0.00162650	0.00162650	0.00162730	0.00163500	0.00164020	0.00167660	0.00166170	0.00165510	0.00164780
Common Class I [Member]
Cash distributions announced per unit and per day	0.00166900		0.00166900	0.00166900	0.00166900	0.00166900	0.00166900	0.00166900	0.00166900	0.00166900	0.00166900	0.00167100	0.00168070	0.00168560	0.00167660	0.00166170	0.00165510	0.00164780
Class P-A shares [Member]
Cash distributions announced per unit and per day	0.00164790		0.00164790	0.00164790	0.00164790	0.00164790	0.00164790					0.00159520	0.00159520	0.00160360	0.00159680	0.00158260
Class P-I shares [Member]
Cash distributions announced per unit and per day	$ 0.00158280		$ 0.00158280	$ 0.00158280	$ 0.00158280	$ 0.00158280	$ 0.00158280	$ 0.00158280	$ 0.00158280	$ 0.00158280	$ 0.00159010	$ 0.00158280	$ 0.00159520	$ 0.00160360	$ 0.00159680	$ 0.00158260

Distributions (Details 1)

Distributions (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Paid in Cash	$ 19,131,428	$ 11,611,348	$ 6,656,076
Values of Shares Issued Under DRP	6,752,677	6,126,789	4,747,534
Total	$ 25,884,105	$ 17,738,137	$ 11,403,610
Pay Date # 1 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Feb. 1, 2018	Feb. 1, 2018	Feb. 1, 2017
Paid in Cash	$ 1,317,325	$ 728,738	$ 431,686
Values of Shares Issued Under DRP	583,571	464,821	349,842
Total	$ 1,900,896	$ 1,193,559	$ 781,528
Pay Date # 2 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Mar. 1, 2019	Mar. 1, 2018	Mar. 1, 2017
Paid in Cash	$ 1,247,614	$ 682,039	$ 413,270
Values of Shares Issued Under DRP	552,615	428,310	332,761
Total	$ 1,800,229	$ 1,110,349	$ 746,031
Pay Date # 3 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Apr. 1, 2019	Apr. 2, 2018	Apr. 3, 2017
Paid in Cash	$ 1,452,585	$ 790,925	$ 482,113
Values of Shares Issued Under DRP	611,400	474,370	371,902
Total	$ 2,063,985	$ 1,265,295	$ 854,015
Pay Date # 4 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	May 1, 2019	May 1, 2018	May 1, 2017
Paid in Cash	$ 1,438,057	$ 792,185	$ 486,864
Values of Shares Issued Under DRP	600,614	475,874	370,463
Total	$ 2,038,671	$ 1,268,059	$ 857,327
Pay Date # 5 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Jun. 3, 2019	Jun. 1, 2018	Jun. 1, 2017
Paid in Cash	$ 1,553,801	$ 883,662	$ 524,909
Values of Shares Issued Under DRP	622,584	507,728	383,585
Total	$ 2,176,385	$ 1,391,390	$ 908,494
Pay Date # 6 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Jul. 1, 2019	Jul. 2, 2018	Jul. 3, 2017
Paid in Cash	$ 1,764,339	$ 927,638	$ 534,165
Values of Shares Issued Under DRP	383,813	502,333	382,339
Total	$ 2,148,152	$ 1,429,971	$ 916,504
Pay Date # 7 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Aug. 1, 2019	Aug. 1, 2018	Aug. 1, 2017
Paid in Cash	$ 1,850,929	$ 1,013,883	$ 572,833
Values of Shares Issued Under DRP	393,237	529,333	406,993
Total	$ 2,244,166	$ 1,543,216	$ 979,826
Pay Date # 8 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Sep. 2, 2019	Sep. 4, 2018	Sep. 1, 2017
Paid in Cash	$ 1,664,451	$ 1,078,310	$ 600,962
Values of Shares Issued Under DRP	613,333	541,479	415,864
Total	$ 2,277,784	$ 1,619,789	$ 1,016,826
Pay Date # 9 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Oct. 1, 2019	Oct. 1, 2018	Oct. 2, 2017
Paid in Cash	$ 1,647,779	$ 1,097,313	$ 603,869
Values of Shares Issued Under DRP	589,769	529,751	411,848
Total	$ 2,237,548	$ 1,627,064	$ 1,015,717
Pay Date # 10 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Nov. 1, 2019	Nov. 1, 2018	Nov. 1, 2017
Paid in Cash	$ 1,715,922	$ 1,178,736	$ 637,604
Values of Shares Issued Under DRP	609,493	555,383	436,753
Total	$ 2,325,415	$ 1,734,119	$ 1,074,357
Pay Date # 11 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Dec. 2, 2019	Dec. 3, 2018	Dec. 1, 2017
Paid in Cash	$ 1,693,670	$ 1,177,142	$ 656,495
Values of Shares Issued Under DRP	587,119	546,446	430,860
Total	$ 2,280,789	$ 1,723,588	$ 1,087,355
Pay Date # 12 [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Pay Date	Jan. 1, 2020	Jan. 2, 2019	Jan. 2, 2018
Paid in Cash	$ 1,784,956	$ 1,260,777	$ 711,306
Values of Shares Issued Under DRP	605,129	570,961	454,324
Total	$ 2,390,085	$ 1,831,738	$ 1,165,630

Distributions (Details 2)

Distributions (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Distributions Made to Members or Limited Partners [Abstract]
Cash from operations	$ 4,088,660	$ 11,611,348	$ 6,656,075
Offering proceeds	15,042,768
Total cash distributions	$ 19,131,428	$ 11,611,348	$ 6,656,075

Income Taxes (Details)

Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
US federal
State and local
Foreign jurisdiction
Tax (benefit)/expense
Change in valuation allowance
Deferred tax (benefit) expense
Change in benefit from deferred taxes on unrealized depreciation on investments
Tax benefit/(expense), net
Deferred
US federal	3,551,704	(1,218,349)	1,289,202
State and local	(44,946)	(254,810)	273,787
Foreign jurisdiction
Tax (benefit)/expense	3,506,758	(1,473,159)	1,562,989
Change in valuation allowance	1,231,693	(54,758)	92,366
Deferred tax (benefit) expense	(3,188,431)
Change in benefit from deferred taxes on unrealized depreciation on investments	7,926,882
Tax benefit/(expense), net	4,738,451	(1,527,917)	1,655,355
Total
US federal	3,551,704	(1,218,349)	1,289,202
State and local	(44,946)	(254,810)	273,787
Foreign jurisdiction
Tax (benefit)/expense	3,506,758	(1,473,159)	1,562,989
Change in valuation allowance	1,231,693	(54,758)	92,366
Deferred tax (benefit) expense	(3,188,431)
Change in benefit from deferred taxes on unrealized depreciation on investments	7,926,882
Tax (benefi)t/expense, net	$ 4,738,451	$ (1,527,917)	$ 1,655,355

Income Taxes (Details 1)

Income Taxes (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net increase in net assets from operations before tax, based on ASC 946, at the federal income tax rate	$ 7,125,202	$ 2,523,711	$ 2,793,488
Add: Greenbacker Renewable Energy, LLC's loss treated as a partnership for U.S. tax purposes, at federal income tax rate	1,387,056	283,062	337,284
Add: Greenbacker Renewable Energy Corporation's consolidated book (loss) based on standard GAAP accounting, at federal income tax rate	(4,713,909)	(3,769,926)	(2,225,352)
Federal tax credit	(246,645)	(255,196)
Increase in income taxes resulting from:
State and local taxes, net of federal benefit	969,124	(270,036)	261,224
Change in state rate	(1,014,070)	15,226	12,562
Change in federal rate			383,783
Change in valuation allowance	1,231,693	(54,758)	92,366
Actual provision for income taxes	$ 4,738,451	$ (1,527,917)	$ 1,655,355
Net increase (decrease) in net assets from operations before tax, based on ASC 946, at the federal income tax rate	150.37%	(165.17%)	168.75%
Reversal of Greenbacker Renewable Energy, LLC's (income)/loss treated as a partnership for U.S tax purposes, at federal income tax rate	29.27%	(18.53%)	20.38%
Adjustment for Greenbacker Renewable Energy Corporation's consolidated book income/(loss), based on standard GAAP accounting, at federal income tax rate	(9948.00%)	246.74%	(134.43%)
Federal tax credit	(521.00%)	16.70%
State tax credit
Increase in income taxes resulting from:
State and local taxes, net of federal benefit	2045.00%	17.67%	15.78%
Change in state rate	(21.40%)	(1.00%)	0.76%
Change in federal rate			23.18%
Permanent differences, at federal income tax rate
Change in valuation allowances	26.00%	3.59%	5.58%
Actual provision for income taxes	10000.00%	100.00%	100.00%

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Amortization	$ 53,558	$ 60,181
Net operating losses	27,935,648	21,289,433
Federal tax credits	7,046,772	5,756,076
Unrealized gains	(32,223,751)	(20,786,706)
Deferred tax assets	2,812,227	6,318,984
Less: valuation allowance	(1,498,721)	(267,027)
Deferred tax assets, net	$ 1,313,506	$ 6,051,957

Income Taxes (Details 3)

Income Taxes (Details 3)	Dec. 31, 2019USD ($)
2020 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount	802,822
State NOL Amount
2021 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount	422,885
State NOL Amount
2022 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	918,368
2023 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	2,454,562
2024 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	2,549,437
2025 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	673,181
2026 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	2,934,175
2027 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	4,162,481
2028 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	10,579,879
2029 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount
2030 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	2,751,775
2031 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	5,377,684
2032 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	8,015,544
2033 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount	7,163,874
2034 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount	161,963
Federal ITC Amount
State ITC Amount
State NOL Amount	156,188
2035 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount	6,693,198
Federal ITC Amount	3,345,092
State ITC Amount
State NOL Amount	2,718,197
2036 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount	15,734,069
Federal ITC Amount	1,955,780
State ITC Amount
State NOL Amount	5,911,423
2037 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount	26,927,165
Federal ITC Amount
State ITC Amount
State NOL Amount	13,684,243
2038 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount	35,706,007
Federal ITC Amount	273,548
State ITC Amount
State NOL Amount	18,592,693
2039 [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount	20,866,683
Federal ITC Amount	246,645
State ITC Amount
State NOL Amount
Indefinite [Member]
Operating Loss Carryforwards [Line Items]
Federal NOL Amount
Federal ITC Amount
State ITC Amount
State NOL Amount

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes (Textual)
Deferred tax assets valuation allowance	$ 1,498,721	$ 267,027
Corporate tax rate	21.00%
Percentage of adjusted taxable income	30.00%
Percentage of investments in depreciable property	100.00%
Percentage of post 2017 net operating losses on taxable income	80.00%
Net operating loss expire, Description	Through 2038

Commitments and Contingencies (

Commitments and Contingencies (Details Textual) - USD ($)	1 Months Ended
	Sep. 30, 2019	Dec. 31, 2019
Other Commitments [Line Items]
Investment in operating assets, description	GREC signed a purchase and sale agreement to acquire an interest in Greenbacker Wind – I, which is comprised of two projects Elk and Hawkeye. Elk is a 42.5 MW operating wind farm located in Delaware County, Iowa, and Hawkeye is a 37.5 MW operating wind farm located in Fayette County, Iowa. Elk and Hawkeye reached their COD in 2011 and 2012, respectively, and originally secured 20 and 25-year busbar PPAs with an investment-grade utility.
Renewable Energy Credit [Member]
Other Commitments [Line Items]
Investment outstanding balance		$ 883,275
7 Operating Entities [Member]
Other Commitments [Line Items]
Investment outstanding balance		183,400,000
9 Operating Entities [Member] | MIPA [Member]
Other Commitments [Line Items]
Investment outstanding balance		$ 245,080,000

Financial Highlights (Details)

Financial Highlights (Details) - USD ($)		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Class A shares [Member]
Per share data attributed to common shares:
Net Asset Value at beginning of period		$ 8.54	[1]	$ 8.68		$ 8.69	[2]
Net investment income	[3]	0.17	[1]	0.28	[4]	0.25	[2]
Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder		0.80	[1]	0.12	[4]	0.35	[2]
Change in translation of assets and liabilities denominated in foreign currencies			[1]		[4],[5]	0.01	[2],[5]
Change in benefit from deferred taxes on unrealized depreciation on investments		(0.18)	[1]	0.08	[4]	0.05	[2]
Net increase in net assets attributed to common stockholders/members		0.79	[1]	0.48	[4]	0.66	[2]
Shareholder distributions:
Distributions from net investment income		(0.10)	[1]	(0.33)	[4]	(0.39)	[2]
Distributions from offering proceeds		(0.51)	[1]	(0.28)	[4]	(0.22)	[2]
Offering costs and deferred sales commissions		(0.02)	[1]	(0.03)	[4]	(0.04)	[2]
Other	[6]	(0.14)	[1]	0.02	[4]	(0.02)	[2]
Net decrease in members' equity attributed to common shares		(0.77)	[1]	(0.62)	[4]	(0.01)	[2]
Net asset value for common shares at end of period		$ 8.56	[1]	$ 8.54	[1]	$ 8.68
Common equityholders' equity at end of period		$ 147,304,141	[1]	$ 142,791,899	[4]	$ 120,344,517	[2]
Common shares outstanding at end of period		17,210,016	[1]	16,714,738	[4]	13,857,830	[2]
Ratio/Supplemental data for common shares (annualized):
Total return attributed to common shares based on net asset value		8.06%		5.45%		6.90%
Ratio of net investment income to average net assets		1.97%		3.24%		2.96%
Ratio of operating expenses to average net assets		3.94%		3.87%		3.64%
Portfolio turnover rate		14.04%		0.05%		19.15%
Class C shares [Member]
Per share data attributed to common shares:
Net Asset Value at beginning of period		$ 8.34	[1]	$ 8.42		$ 8.44	[2]
Net investment income	[3]	0.17	[1]	0.28	[4]	0.25	[2]
Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder		0.80	[1]	0.12	[4]	0.35	[2]
Change in translation of assets and liabilities denominated in foreign currencies			[1]		[4],[5]	0.01	[2],[5]
Change in benefit from deferred taxes on unrealized depreciation on investments		(0.18)	[1]	0.08	[4]	0.05	[2]
Net increase in net assets attributed to common stockholders/members		0.79	[1]	0.48	[4]	0.66	[2]
Shareholder distributions:
Distributions from net investment income		(0.10)	[1]	(0.33)	[4]	(0.39)	[2]
Distributions from offering proceeds		(0.50)	[1]	(0.26)	[4]	(0.22)	[2]
Offering costs and deferred sales commissions		(0.05)	[1]	(0.08)	[4]	(0.15)	[2]
Other	[6]	(0.10)	[1]	0.11	[4]	0.08	[2]
Net decrease in members' equity attributed to common shares		(0.75)	[1]	(0.56)	[4]	(0.02)	[2]
Net asset value for common shares at end of period		$ 8.38	[1]	$ 8.34	[1]	$ 8.42
Common equityholders' equity at end of period		$ 22,792,345	[1]	$ 18,546,310	[4]	$ 12,053,349	[2]
Common shares outstanding at end of period		2,718,475	[1]	2,222,478	[4]	1,431,999	[2]
Ratio/Supplemental data for common shares (annualized):
Total return attributed to common shares based on net asset value		7.79%		6.19%		6.77%
Ratio of net investment income to average net assets		1.98%		3.26%		3.04%
Ratio of operating expenses to average net assets		3.96%		3.95%		3.74%
Portfolio turnover rate		14.04%		0.05%		19.15%
Class I shares [Member]
Per share data attributed to common shares:
Net Asset Value at beginning of period		$ 8.54	[1]	$ 8.68		$ 8.69	[2]
Net investment income	[3]	0.17	[1]	0.28	[4]	0.25	[2]
Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder		0.80	[1]	0.12	[4]	0.35	[2]
Change in translation of assets and liabilities denominated in foreign currencies			[1]		[4],[5]	0.01	[2],[5]
Change in benefit from deferred taxes on unrealized depreciation on investments		(0.18)	[1]	0.08	[4]	0.05	[2]
Net increase in net assets attributed to common stockholders/members		0.79	[1]	0.48	[4]	0.66	[2]
Shareholder distributions:
Distributions from net investment income		(0.10)	[1]	(0.33)	[4]	(0.39)	[2]
Distributions from offering proceeds		(0.51)	[1]	(0.28)	[4]	(0.21)	[2]
Offering costs and deferred sales commissions		(0.02)	[1]	(0.04)	[4]	(0.08)	[2]
Other	[6]	(0.13)	[1]	0.03	[4]	0.01	[2]
Net decrease in members' equity attributed to common shares		(0.76)	[1]	(0.62)	[4]	(0.01)	[2],[6]
Net asset value for common shares at end of period		$ 8.56	[1]	$ 8.54	[1]	$ 8.68
Common equityholders' equity at end of period		$ 57,292,421	[1]	$ 53,046,260	[4]	$ 39,181,769	[2]
Common shares outstanding at end of period		6,693,658	[1]	6,209,416	[4]	4,511,832	[2]
Ratio/Supplemental data for common shares (annualized):
Total return attributed to common shares based on net asset value		8.05%		5.44%		6.90%
Ratio of net investment income to average net assets		1.95%		3.20%		2.96%
Ratio of operating expenses to average net assets		3.90%		3.86%		3.64%
Portfolio turnover rate		14.04%		0.05%		19.15%
Class P-A shares [Member]
Per share data attributed to common shares:
Net Asset Value at beginning of period		$ 8.55	[1]	$ 8.75	[4],[7]
Net investment income	[3]	0.17	[1]	0.07	[4]
Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder		0.80	[1]	(0.05)	[4],[7]
Change in translation of assets and liabilities denominated in foreign currencies			[1]		[4],[5]
Change in benefit from deferred taxes on unrealized depreciation on investments		(0.18)	[1]	0.12	[4],[7]
Net increase in net assets attributed to common stockholders/members		0.79	[1]	0.14	[4],[7]
Shareholder distributions:
Distributions from net investment income		(0.10)	[1]	(0.08)	[4],[7]
Distributions from offering proceeds		(0.51)	[1]	(0.14)	[4],[7]
Offering costs and deferred sales commissions			[1]	(0.14)	[4],[7]
Other	[6]	(0.13)	[1]	0.02	[4]
Net decrease in members' equity attributed to common shares		(0.74)	[1]	(0.34)	[4],[7]
Net asset value for common shares at end of period		$ 8.60	[1]	$ 8.55	[1]	$ 8.75	[4],[7]
Common equityholders' equity at end of period		$ 155,808	[1]	$ 132,272	[4],[7]
Common shares outstanding at end of period		18,109	[1]	15,478	[4],[7]
Ratio/Supplemental data for common shares (annualized):
Total return attributed to common shares based on net asset value		7.66%		1.06%
Ratio of net investment income to average net assets		1.96%		1.97%
Ratio of operating expenses to average net assets		3.92%		3.48%
Portfolio turnover rate		14.04%		0.05%
Class P-I shares [Member]
Per share data attributed to common shares:
Net Asset Value at beginning of period		$ 8.76	[1]	$ 8.81		8.67	[2]
Net investment income	[3]	0.17	[1]	0.28	[4]	0.25	[2]
Net realized and unrealized gain/(loss) on investments, net of incentive allocation to special unitholder		0.80	[1]	0.12	[4]	0.35	[2]
Change in translation of assets and liabilities denominated in foreign currencies			[1]		[4],[5]	0.01	[2],[5]
Change in benefit from deferred taxes on unrealized depreciation on investments		(0.18)	[1]	0.08	[4]	0.05	[2]
Net increase in net assets attributed to common stockholders/members		0.79	[1]	0.48	[4]	0.66	[2]
Shareholder distributions:
Distributions from net investment income		(0.10)	[1]	(0.30)	[4]	(0.39)	[2]
Distributions from offering proceeds		(0.48)	[1]	(0.28)	[4]	(0.19)	[2]
Offering costs and deferred sales commissions			[1]		[4]		[2]
Other	[6]	(0.07)	[1]	0.05	[4]	0.06	[2]
Net decrease in members' equity attributed to common shares		(0.65)	[1]	(0.53)	[4]	0.14	[2],[6]
Net asset value for common shares at end of period		$ 8.90	[1]	$ 8.76	[1]	$ 8.81
Common equityholders' equity at end of period		$ 189,009,074	[1]	$ 103,742,870	[4]	$ 29,858,889	[2]
Common shares outstanding at end of period		21,249,352	[1]	11,841,392	[4]	3,387,568	[2]
Ratio/Supplemental data for common shares (annualized):
Total return attributed to common shares based on net asset value		8.49%		6.16%		8.65%
Ratio of net investment income to average net assets		1.91%		2.86%		2.92%
Ratio of operating expenses to average net assets		3.81%		3.69%		3.59%
Portfolio turnover rate		14.04%		0.05%		19.15%
[1]	The per share data for Class A, C, I, P-A and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2019, which were 17,270,555, 2,645,713, 6,642,314, 17,841, and 17,211,763, respectively.
[2]	The per share data for Class A, C, I and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2017, which were 12,384,101, 1,194,718, 3,529,998 and 1,792,632, respectively.
[3]	Does not reflect any incentive fees that may be payable to the Special Unitholder.
[4]	The per share data for Class A, C, I, P-A and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2018, which were 15,338,291, 1,803,985, 5,386,556, 11,042, and 7,266,426, respectively.
[5]	Amount is less than $0.01 per share.
[6]	Represents the impact of different share amounts used in calculating certain per share data based on weighted average shares outstanding during the period and the impact of shares at a price other than the net asset value.
[7]	Class P-A shares were reinstated for sale as of April 16, 2018 and first sold on August 6, 2018.

Financial Highlights (Details T

Financial Highlights (Details Textual) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financial Highlights (Textual)
Weighted average common shares outstanding	43,788,187	29,799,735	18,922,343
Class A shares [Member]
Financial Highlights (Textual)
Weighted average common shares outstanding	15,338,291	15,338,291	12,384,101
Class C shares [Member]
Financial Highlights (Textual)
Weighted average common shares outstanding	1,803,985	1,803,985	1,194,718
Class I shares [Member]
Financial Highlights (Textual)
Weighted average common shares outstanding	5,386,556	5,386,556	3,529,998
Class P-A shares [Member]
Financial Highlights (Textual)
Weighted average common shares outstanding	11,042	11,042
Class P-I shares [Member]
Financial Highlights (Textual)
Weighted average common shares outstanding	7,266,426	7,266,426	1,792,632

Selected Quarterly Data (Unau_3

Selected Quarterly Data (Unaudited) (Details) - USD ($)		3 Months Ended																				12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Total investment income		$ 4,640,954	$ 6,679,823	$ 4,876,003	$ 2,565,925	$ 4,540,427	$ 5,103,336	$ 4,984,874	$ 4,918,793	$ 4,416,117	$ 3,663,635	$ 2,936,470	$ 2,366,899	$ 2,848,655	$ 3,085,513	$ 1,645,291	$ 656,566	$ 421,488	$ 740,773	$ 633,646	$ 58,215	$ 18,762,705	$ 19,392,582		$ 13,339,269		$ 8,236,025
Net investment income (loss)		4,587,394	2,067,331	1,417,709	(795,343)	(434,963)	1,988,378	3,259,425	3,271,370	229,297	1,149,977	1,986,899	1,450,378	1,497,148	1,730,438	1,519,649	23,132	253,576	270,523	333,917	(118,483)	4,472,303	8,084,210		4,816,551		4,679,670
Net gain (loss) on investments and foreign currency translation		5,248,381	16,589,939	6,098,299	7,281,283	(1,693,642)	(296,054)	2,341,771	2,452,402	3,738,403	1,579,619	1,576,272	(108,245)	(1,706,876)	1,143,849	(231,426)	(634,047)	666,498	376,473	(46,396)	385,490
Change in (benefit) expense from deferred taxes on unrealized appreciation on investments		(3,383,241)	(2,463,723)	(1,482,457)	(597,461)	1,877,386	2,275,076	73,354	(1,239,228)	1,198,186	680,969	(653,366)	(262,069)	671,401	(8,372)	1,838,292	1,885,335	127,015				(7,926,882)	2,986,588		963,720		4,386,656
Net increase (decrease) in net assets resulting from operations		$ 6,452,534	$ 16,193,547	$ 6,033,551	$ 5,888,479	$ (251,219)	$ 3,967,400	$ 5,674,550	$ 4,484,544	$ 5,165,886	$ 3,410,565	$ 2,909,805	$ 1,080,064	$ 461,673	$ 2,865,915	$ 3,126,515	$ 1,274,420	$ 1,047,089	$ 646,996	$ 287,521	$ 267,007	$ 29,132,932	$ 13,875,275		$ 12,566,320		$ 7,728,523
Net investment income (loss) per share - basic and diluted (in dollars per share)		$ 0.1	$ 0.05		$ (0.02)	$ (0.01)	$ 0.06	$ 0.12	$ 0.13	$ (0.01)	$ 0.06	$ 0.11	$ 0.09	$ 0.11	$ 0.14	$ 0.15	$ 0	$ 0.09	$ 0.07	$ 0.14	$ (0.08)	$ 0.17	$ 0.27		$ 0.25		$ 0.43
Net increase (decrease) in net assets resulting from operations per share - basic and diluted (in dollars per share)		0.15	0.36	0.1	0.15	(0.01)	0.12	0.21	0.19	0.22	0.16	0.15	0.07	0.03	0.24	0.30	0.16	0.20	0.17	0.12	0.18
Net asset value per share at period end (in dollars per share)																		$ 8.54	$ 8.52	$ 8.50	$ 8.50
Common Class A [Member]
Net investment income (loss) per share - basic and diluted (in dollars per share)																							0.28	[1],[2]	0.25	[3],[4]	0.43	[3]
Net asset value per share at period end (in dollars per share)		8.6	8.62	8.48	8.5	8.54	8.69	8.72	8.70	8.68	8.64	8.63	8.64	8.69	8.74	8.69	8.56					8.6	8.54		8.68		8.69
Common Class C [Member]
Net investment income (loss) per share - basic and diluted (in dollars per share)																							0.28	[1],[2]	0.25	[3],[4]	0.43	[3]
Net asset value per share at period end (in dollars per share)		8.38	8.44	8.31	8.32	8.34	8.48	8.50	8.45	8.42	8.42	8.41	8.40	8.44	8.49	8.43	8.56					8.38	8.34		8.42		8.44
Common Class I [Member]
Net investment income (loss) per share - basic and diluted (in dollars per share)	[3]																						0.28	[2]	0.25	[4]	0.43
Net asset value per share at period end (in dollars per share)		8.6	8.62	8.48	8.5	8.54	8.69	8.72	8.70	8.68	8.64	8.63	8.64	8.69	8.74	8.69	8.56					8.6	8.54		8.68		8.69
Class P-A shares [Member]
Net investment income (loss) per share - basic and diluted (in dollars per share)	[3]																						0.07	[2],[5]			0.19
Net asset value per share at period end (in dollars per share)		8.6	8.65	8.51	8.53	8.55	8.71							8.67	8.74							8.6	8.55				8.67
Class P-I shares [Member]
Net investment income (loss) per share - basic and diluted (in dollars per share)	[3]																						0.28	[2]	0.25	[4]	0.19
Net asset value per share at period end (in dollars per share)		$ 8.9	$ 8.93	$ 8.77	$ 8.76	$ 8.76	$ 8.89	$ 8.9	$ 8.84	$ 8.81	$ 8.75	$ 8.73	$ 8.69	$ 8.67	$ 8.74							$ 8.9	$ 8.76		$ 8.81		$ 8.67
[1]	Amount is less than $0.01 per share.
[2]	The per share data for Class A, C, I, P-A and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2018, which were 15,338,291, 1,803,985, 5,386,556, 11,042, and 7,266,426, respectively.
[3]	Does not reflect any incentive fees that may be payable to the Special Unitholder.
[4]	The per share data for Class A, C, I and P-I Shares were derived by using the weighted average shares outstanding during the year ended December 31, 2017, which were 12,384,101, 1,194,718, 3,529,998 and 1,792,632, respectively.
[5]	Class P-A shares were reinstated for sale as of April 16, 2018 and first sold on August 6, 2018.

Subsequent Events (Details Text

Subsequent Events (Details Textual)	Mar. 05, 2020USD ($)
Subsequent Event [Member]
Subsequent Events (Textual)
Investment sales price	$ 45,000,000