Atlantica Sustainable Infrastructure (AY) 6-K 10 Nov 21 Current report (foreign) Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 30, 2021
Cover page.
Document Type	6-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Current Fiscal Year End Date	--12-31
Entity Registrant Name	Atlantica Sustainable Infrastructure plc
Entity Central Index Key	0001601072

Consolidated condensed statemen

Consolidated condensed statements of financial position - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Non-current assets
Contracted concessional assets	$ 8,173,917	$ 8,155,418
Investments carried under the equity method	296,762	116,614
Financial investments	88,866	89,754
Deferred tax assets	164,304	152,290
Total non-current assets	8,723,849	8,514,076
Current assets
Inventories	33,156	23,958
Trade and other receivables	324,267	331,735
Financial investments	207,801	200,084
Cash and cash equivalents	763,545	868,501
Total current assets	1,328,769	1,424,278
Total assets	10,052,618	9,938,354
Equity attributable to the Company
Share capital	11,148	10,667
Share premium	836,269	1,011,743
Capital reserves	1,069,344	881,745
Other reserves	147,915	96,641
Accumulated currency translation differences	(122,188)	(99,925)
Accumulated deficit	(388,820)	(373,489)
Non-controlling interests	207,922	213,499
Total equity	1,761,589	1,740,881
Non-current liabilities
Long-term corporate debt	1,009,128	970,077
Long-term project debt	4,568,387	4,925,268
Grants and other liabilities	1,271,460	1,229,767
Derivative liabilities	249,639	328,184
Deferred tax liabilities	302,612	260,923
Total non-current liabilities	7,401,226	7,714,219
Current liabilities
Short-term corporate debt	20,951	23,648
Short-term project debt	710,493	312,346
Trade payables and other current liabilities	118,600	92,557
Income and other tax payables	39,759	54,703
Total current liabilities	889,803	483,254
Total equity and liabilities	$ 10,052,618	$ 9,938,354

Consolidated condensed income s

Consolidated condensed income statements - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Consolidated income statements [Abstract]
Revenue	$ 940,418	$ 768,734
Other operating income	57,597	75,902
Employee benefit expenses	(59,105)	(37,430)
Depreciation, amortization, and impairment charges	(334,916)	(302,166)
Other operating expenses	(320,873)	(197,635)
Operating profit	283,121	307,405
Financial income	1,848	6,413
Financial expense	(277,000)	(289,439)
Net exchange differences	2,046	(1,482)
Other financial income, net	21,684	62,597
Financial expense, net	(251,422)	(221,911)
Share of profit/(loss) of associates carried under the equity method	4,245	(2,248)
Profit before income tax	35,944	83,246
Income tax	(42,390)	(25,079)
Profit/(loss) for the period	(6,446)	58,167
(Profit)/loss attributable to non-controlling interests	(11,720)	3,042
Profit/(loss) for the period attributable to the Company	$ (18,166)	$ 61,209
Weighted average number of ordinary shares outstanding - basic (in shares)	110,749	101,602
Weighted average number of ordinary shares outstanding - diluted (in shares)	114,156	102,499
Basic earnings per share (in dollars per share)	$ (0.16)	$ 0.60
Diluted earnings per share (in dollars per share)	$ (0.16)	$ 0.60

Consolidated condensed statem_2

Consolidated condensed statements of comprehensive income - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Consolidated statements of comprehensive income [Abstract]
Profit/(loss) for the period	$ (6,446)	$ 58,167
Items that may be subject to transfer to income statement
Change in fair value of cash flow hedges	15,262	(33,159)
Currency translation differences	(27,901)	(18,884)
Tax effect	(4,632)	7,858
Net income/(expense) recognized directly in equity	(17,271)	(44,185)
Cash flow hedges	44,643	43,792
Tax effect	(11,161)	(10,948)
Transfers to income statement	33,482	32,844
Other comprehensive income/(loss)	16,211	(11,341)
Total comprehensive income/(loss) for the period	9,765	46,826
Total comprehensive (income)/loss attributable to non-controlling interests	(8,981)	9,323
Total comprehensive income/(loss) attributable to the Company	$ 784	$ 56,149

Consolidated condensed statem_3

Consolidated condensed statements of changes in equity - USD ($) $ in Thousands	Total	Total Equity Attributable to Company [Member]	Share Capital [Member]	Share Premium [Member]	Capital Reserves [Member]	Other Reserves [Member]	Accumulated Currency Translation Differences [Member]	Accumulated Deficit [Member]	Non-controlling Interests [Member]
Balance, beginning of period at Dec. 31, 2019	$ 1,714,856	$ 1,508,476	$ 10,160	$ 1,011,743	$ 889,057	$ 73,797	$ (90,824)	$ (385,457)	$ 206,380
Profit/(loss) for the nine -month period after taxes	58,167	61,209	0	0	0	0	0	61,209	(3,042)
Change in fair value of cash flow hedges	10,633	10,850	0	0	0	10,850	0	0	(217)
Currency translation differences	(18,884)	(12,766)	0	0	0	0	(12,766)	0	(6,118)
Tax effect	(3,090)	(3,144)	0	0	0	(3,144)	0	0	54
Other comprehensive income/(loss)	(11,341)	(5,060)	0	0	0	7,706	(12,766)	0	(6,281)
Total comprehensive income/(loss) for the period	46,826	56,149	0	0	0	7,706	(12,766)	61,209	(9,323)
Business combinations (Note 5)	25,079	0	0	0	0	0	0	0	25,079
Distributions (Note 13)	(144,714)	(125,987)	0	0	(125,987)	0	0	0	(18,727)
Balance, end of period at Sep. 30, 2020	1,642,047	1,438,638	10,160	1,011,743	763,070	81,503	(103,590)	(324,248)	203,409
Balance, beginning of period at Dec. 31, 2020	1,740,881	1,527,382	10,667	1,011,743	881,745	96,641	(99,925)	(373,489)	213,499
Profit/(loss) for the nine -month period after taxes	(6,446)	(18,166)	0	0	0	0	0	(18,166)	11,720
Change in fair value of cash flow hedges	59,905	56,493	0	0	0	66,553	0	(10,060)	3,412
Currency translation differences	(27,901)	(22,264)	0	0	0	0	(22,264)	0	(5,637)
Tax effect	(15,793)	(15,279)	0	0	0	(15,279)	0	0	(514)
Other comprehensive income/(loss)	16,211	18,950	0	0	0	51,274	(22,264)	(10,060)	(2,739)
Total comprehensive income/(loss) for the period	9,765	784	0	0	0	51,274	(22,264)	(28,226)	8,981
Capital increase (Note 13)	154,574	154,574	481	24,526	129,567	0	0	0	0
Reduction of Share Premium (Note 13)	0	0	0	(200,000)	200,000	0	0	0	0
Business combinations (Note 5)	8,287	0	0	0	0	0	0	0	8,287
Share-based compensation (Note 13)	12,895	12,895	0	0	0	0	0	12,895	0
Distributions (Note 13)	(164,813)	(141,968)	0	0	(141,968)	0	0	0	(22,845)
Balance, end of period at Sep. 30, 2021	$ 1,761,589	$ 1,553,667	$ 11,148	$ 836,269	$ 1,069,344	$ 147,915	$ (122,189)	$ (388,820)	$ 207,922

Consolidated condensed cash flo

Consolidated condensed cash flows statements - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Consolidated cash flows statements [Abstract]
Profit/(loss) for the period	$ (6,446)	$ 58,167
Financial expense and non-monetary adjustments	609,429	536,579
Profit/(loss) for the period adjusted by non-monetary items	602,983	594,746
Changes in working capital	47,987	(128,926)
Net interest and income tax paid	(209,030)	(162,578)
Net cash provided by operating activities	441,940	303,242
Acquisitions of subsidiaries and entities under the equity method	(337,539)	8,943
Investment in contracted concessional assets	(10,348)	3,819
Distributions from entities under the equity method	24,615	20,140
Other non-current assets/liabilities	375	(14,387)
Net cash (used in)/provided by investing activities	(322,897)	18,515
Proceeds from Project debt	11,149	603,948
Proceeds from Corporate debt	409,023	673,648
Repayment of Project debt	(256,170)	(470,700)
Repayment of Corporate debt	(361,154)	(488,866)
Dividends paid to Company's shareholders	(141,968)	(125,986)
Dividends paid to non-controlling interests	(23,327)	(20,994)
Purchase of Liberty's equity interests in Solana	0	(266,849)
Capital increase	154,482	0
Net cash provided by/(used in) financing activities	(207,965)	(95,799)
Net increase/ (decrease) in cash and cash equivalents	(88,922)	225,958
Cash and cash equivalents at beginning of the period	868,501	562,795
Translation differences in cash or cash equivalent	(16,034)	142
Cash and cash equivalents at end of the period	$ 763,545	$ 788,895

Nature of the business

Nature of the business	9 Months Ended
	Sep. 30, 2021
Nature of the business [Abstract]
Nature of the business	Note 1. - Nature of the business Atlantica Sustainable Infrastructure plc (“Atlantica” or the “Company”) is a sustainable infrastructure company that owns, manages and invests in renewable energy, storage, efficient natural gas and heat, transmission lines and water assets focused on North America (the United States, Canada and Mexico), South America (Peru, Chile and Uruguay) and EMEA (Spain, Algeria and South Africa). Atlantica’s shares began trading on the NASDAQ Global Select Market under the symbol “ABY” on June 13, 2014. The symbol changed to “AY” on November 11, 2017. Algonquin Power & Utilities Corp. (“Algonquin”) is the largest shareholder of the Company and currently owns a 43.9% stake in Atlantica. Algonquin’s voting rights and rights to appoint directors are limited to 41.5% and the difference between Algonquin´s ownership and 41.5% will vote replicating non-Algonquin’s shareholders’ vote. During 2020, the Company completed the following acquisitions: - On April 3, 2020, the Company made an initial investment in the creation of a renewable energy platform in Chile, together with financial partners, where it owns approximately a 35% stake and has a strategic investor role. The first investment was the acquisition of a 55 MW solar PV plant (“Chile PV 1”). The Company’s initial contribution was approximately $4 million. In addition, on January 6, 2021, the Company closed its second investment through the platform with the acquisition of a 40 MW solar PV plant (“Chile PV 2”). This asset started commercial operation in 2017 and its revenue is partially contracted. The total equity investment for this new asset was approximately $5.0 million. The platform intends to make further investments in renewable energy in Chile and to sign PPAs with credit worthy off-takers. - In January 2019, the Company entered into an agreement with Abengoa (references to “Abengoa” refer to Abengoa, S.A., together with its subsidiaries, or Abenewco1, S.A. together with its subsidiaries, unless the context otherwise requires) for the acquisition of a 51% stake in Tenes, a water desalination plant in Algeria. Closing of the acquisition was subject to certain conditions precedent, which were not fulfilled. In accordance with the terms of the share purchase agreement, the advance payment made for the acquisition was converted into a secured loan to be reimbursed by Befesa Agua Tenes, the holding company of Tenes, together with 12% per annum interest, through a full cash-sweep of all the dividends to be received from the asset. On May 31, 2020, the Company entered into a new agreement, which provides the Company with certain additional decision rights, a majority at the board of directors of Befesa Agua Tenes and control over the asset. - On August 17, 2020, the Company closed the acquisition of Liberty’s equity interest in Solana. Liberty was the tax equity investor in the Solana project. The total equity investment is expected to be up to $285 million of which $272 million has already been paid. In December 2020, the Company reached an agreement with Algonquin to acquire La Sierpe, a 20 MW solar asset in Colombia for a total equity investment of approximately $20 million. Closing is subject to conditions precedent and regulatory approvals and is expected to occur in the fourth quarter of 2021. Additionally, the Company agreed to invest in additional solar plants in Colombia with a combined capacity of approximately 30 MW. In January 2021 the Company closed the acquisition of 42.5% of the equity of Rioglass Solar Holding S.A. (“Rioglass”) a supplier of spare parts and services to the solar industry, increasing its stake to 57.5%. In addition, on July 22, 2021 the Company exercised the option to acquire the remaining stake of 42.5%. The investment made in 2021 to acquire the additional 85% equity, resulting in a 100% ownership, was approximately $17.1 million (Note 5). The Company initially classified the investment as held for sale in the Consolidated Condensed Interim Financial Statements for the period ended March 31, 2021. Nevertheless, the accounting requirements of IFRS 5, Non.current Assets Held for Sale and Discontinued Operations, to classify the investment as held for sale are no longer fulfilled given that the sale is no longer considered highly probable. Accordingly, as prescribed in IFRS 5, the investment has been fully consolidated from the acquisition date in January 2021. On April 7, 2021, the Company closed the acquisition of Coso, a 135 MW renewable asset in California. Coso is the third largest geothermal plant in the United States and provides base load renewable energy to the California Independent System Operator (California ISO). It has PPAs signed with an 18-year average contract life. The total equity investment was approximately $130 million (Note 5). In addition, on July 15, 2021, the Company paid an additional amount of approximately $40 million to reduce project debt. On May 14, 2021, the Company closed the acquisition of Calgary District Heating, a district heating asset of approximately 55 MWt in Canada for a total equity investment of approximately $22.5 million (Note 5). Calgary District Heating has been in operation since 2010 and represents the first investment of the Company in this sector, which is recognized as a key measure for cities to reduce emissions in line with the UN Environment Program. The asset provides heating services to a diverse range of government, institutional and commercial customers in the city of Calgary. On June 16, 2021, the Company acquired a 49% interest in a 596 MW portfolio of wind assets in the United States (Vento II) for a total equity investment net of cash consolidated at the transaction date of approximately $180.7 million (Note 7). EDP Renewables owns the remaining 51%. The assets have PPAs with investment grade off-takers with five-year average remaining contract life. On August 6, 2021, the Company closed the acquisition of Agrisun and Re Sole, two The following table provides an overview of the main contracted concessional assets the Company owned or had an interest in as of September 30, 2021: Assets Type Ownership Location Currency (9) Capacity (Gross) Counterparty Credit Ratings (10) COD* Contract Years Remaining (16) Solana Renewable (Solar) 100% Arizona (USA) USD 280 MW A-/A2/BBB+ 2013 22 Mojave Renewable (Solar) 100% California (USA) USD 280 MW BB-/WR/BB 2014 18 Chile PV 1 Renewable (Solar) 35% (8) Chile USD 55 MW N/A 2016 N/A Chile PV 2 Renewable (Solar) 35% (8) Chile USD 40 MW N/A 2017 N/A Solaben 2 & 3 Renewable (Solar) 70% (1) Spain Euro 2x50 MW A/Baa1/A- 2012 16/16 Solacor 1 & 2 Renewable (Solar) 87% (2) Spain Euro 2x50 MW A/Baa1/A- 2012 16/16 PS10 & PS20 Renewable (Solar) 100% Spain Euro 31 MW A/Baa1/A- 2007&2009 11/13 Helioenergy 1 & 2 Renewable (Solar) 100% Spain Euro 2x50 MW A/Baa1/A- 2011 15/15 Helios 1 & 2 Renewable (Solar) 100% Spain Euro 2x50 MW A/Baa1/A- 2012 16/16 Solnova 1, 3 & 4 Renewable (Solar) 100% Spain Euro 3x50 MW A/Baa1/A- 2010 14/14/14 Solaben 1 & 6 Renewable (Solar) 100% Spain Euro 2x50 MW A/Baa1/A- 2013 17/17 Seville PV Renewable (Solar) 80% (6) Spain Euro 1 MW A/Baa1/A- 2006 15 Re Sole Renewable (Solar) 100% Italy Euro 2.1 MW BBB/Baa3/BBB- 2011 10 Agrisun Renewable (Solar) 100% Italy Euro 1.6 MW BBB/Baa3/BBB- 2010 9 Kaxu Renewable (Solar) 51% (3) South Africa Rand 100 MW BB-/Ba2/BB- (11) 2015 14 Elkhorn Valley Renewable (Wind) 49% Oregon (USA) USD 101 MW BBB/A3/-- 2007 7 Prairie Star Renewable (Wind) 49% Minnesota (USA) USD 101 MW --/A3/A- 2007 7 Twin Groves II Renewable (Wind) 49% Illinois (USA) USD 198 MW BBB-/Baa2/BBB 2008 5 Lone Star II Renewable (Wind) 49% Texas (USA) USD 196 MW Not rated 2008 2 Palmatir Renewable (Wind) 100% Uruguay USD 50 MW BBB/Baa2/BBB- (12) 2014 13 Cadonal Renewable (Wind) 100% Uruguay USD 50 MW BBB/Baa2/BBB- (12) 2014 13 Melowind Renewable (Wind) 100% Uruguay USD 50 MW BBB/Baa2/BBB- 2015 15 Coso Renewable (Geothermal) 100% California (USA) USD 135 MW Investment Grade (14) 1987-1989 19 Mini-Hydro Renewable (Hydraulic) 100% Peru USD 4 MW BBB+/A3/BBB+ 2012 12 ACT Efficient natural gas & heat 100% Mexico USD 300 MW BBB/ Ba3/BB- 2013 12 Monterrey Efficient natural gas &heat 30% Mexico USD 142 MW Not rated 2018 17 Calgary Efficient natural gas &heat 100% Canada CAD 55 MWt ~41% A+ or higher (15) 2010 20 ATN (13) Transmission line 100% Peru USD 379 miles BBB+/Baa1/BBB 2011 20 ATS Transmission line 100% Peru USD 569 miles BBB+/Baa1/BBB 2014 23 ATN 2 Transmission line 100% Peru USD 81 miles Not rated 2015 12 Quadra 1 & 2 Transmission line 100% Chile USD 49 miles/32 miles Not rated 2014 14/14 Palmucho Transmission line 100% Chile USD 6 miles BBB+/WR/A- 2007 16 Chile TL3 Transmission line 100% Chile USD 50 miles A/A1/A- 1993 Regulated Skikda Water 34.2% (4) Algeria USD 3.5 M ft3/day Not rated 2009 13 Honaine Water 25.5% (5) Algeria USD 7 M ft3/day Not rated 2012 16 Tenes Water 51% (7) Algeria USD 7 M ft3/day Not rated 2015 19 (1) Itochu Corporation, a Japanese trading company, holds 30% of the shares in each of Solaben 2 and Solaben 3. (2) JGC 13% of the shares in each of Solacor 1 and Solacor 2. (3) Kaxu is owned by the Company (51%), Industrial Development Corporation of South Africa ( 29% ) and Kaxu Community Trust ( ). (4) Algerian Energy Company, SPA owns 49% of Skikda and Sacyr Agua, S.L. owns the remaining . (5) Algerian Energy Company, SPA owns 49% of Honaine and Sacyr Agua, S.L. owns the remaining . (6) Instituto para la Diversificación y Ahorro de la Energía (“Idae”), a Spanish state-owned company, holds 20% of the shares in Seville PV. (7) Algerian Energy Company, SPA owns 49% of Tenes. (8) 65% of the shares in Chile PV 1 and Chile PV 2 are indirectly held by financial partners through the renewable energy platform of the Company in Chile . (9) Certain contracts denominated in U.S. dollars are payable in local currency. (10) Reflects the counterparty’s credit ratings issued by Standard & Poor’s Ratings Services, or S&P, Moody’s Investors Service Inc., or Moody’s, and Fitch Ratings Ltd, or Fitch. (11) Refers to the credit rating of the Republic of South Africa. The off-taker is Eskom, which is a state-owned utility company in South Africa. (12) Refers to the credit rating of Uruguay, as UTE (Administración Nacional de Usinas y Transmisoras Eléctricas) is unrated (13) Including ATN Expansion 1 & 2. (14) Refers to the credit rating of two Community Choice Aggregators: Silicon Valley Clean Energy and Monterrey Bar Community Power, both with A Rating from S&P and Southern California Public Power Authority. The third off-taker is not rated. (15) Refers to the credit rating of a diversified mix of 22 high credit quality clients (~41%A+ rating or higher, the rest is unrated). (16) As of September 30, 2021. (*) Commercial Operation Date The Kaxu project financing arrangement contains cross-default provisions related to Abengoa such that debt defaults by Abengoa, subject to certain threshold amounts and/or a restructuring process, could trigger a default under the Kaxu project financing arrangement. The insolvency filing by the individual company Abengoa S.A. in February 2021 represents a theoretical event of default under the Kaxu project finance agreement. In September 2021, the Company obtained a waiver for such theoretical event of default which was conditional upon the replacement of the operation and maintenance supplier of the plant, which is currently an Abengoa subsidiary, before October 31, 2021. On November 4, 2021, the Company obtained an extension of the term for such replacement until January 31, 2022. Although the Company does not expect the acceleration of debt to be declared by the credit entities, as of September 30, 2021 Kaxu did not have what International Accounting Standards define as an unconditional right to defer the settlement of the debt for at least twelve months, as the cross-default provisions make that right conditional. Therefore, Kaxu total debt (Note 15) has been presented as current in the Consolidated Condensed Interim Financial Statements of the Company as of September 30, 2021 for an amount

Basis of preparation

Basis of preparation	9 Months Ended
	Sep. 30, 2021
Basis of preparation [Abstract]
Basis of preparation	Note 2. - Basis of preparation The accompanying Consolidated Condensed Interim Financial Statements represent the consolidated results of the Company and its subsidiaries. The Company’s annual consolidated financial statements as of December 31, 2020, were approved by the Board of Directors on February 26, 2021. These Consolidated Condensed Interim Financial Statements are presented in accordance with International Accounting Standards (“IAS”) 34, “Interim Financial Reporting”. In accordance with IAS 34, interim financial information is prepared solely in order to update the most recent annual consolidated financial statements prepared by the Company, placing emphasis on new activities, occurrences and circumstances that have taken place during the nine-month period ended September 30, 2021, and not duplicating the information previously published in the annual consolidated financial statements for the year ended December 31, 2020. Therefore, the Consolidated Condensed Interim Financial Statements do not include all the information that would be required in a complete set of consolidated financial statements prepared in accordance with the IFRS-IASB (“International Financial Reporting Standards-International Accounting Standards Board”). In view of the above, for an adequate understanding of the information, these Consolidated Condensed Interim Financial Statements must be read together with Atlantica’s consolidated financial statements for the year ended December 31, 2020 included in the 2020 20-F. In determining the information to be disclosed in the notes to the Consolidated Condensed Interim Financial Statements, Atlantica, in accordance with IAS 34, has taken into account its materiality in relation to the Consolidated Condensed Interim Financial Statements. The Consolidated Condensed Interim Financial Statements are presented in U.S. dollars, which is the Company’s functional and presentation currency. Amounts included in these Consolidated Condensed Interim Financial Statements are all expressed in thousands of U.S. dollars, unless otherwise indicated. These Consolidated Condensed Interim Financial Statements were approved by the Board of Directors of the Company on November 9, 2021. Application of new accounting standards a) Standards, interpretations and amendments effective from January 1, 2021 under IFRS-IASB, applied by the Company in the preparation of these condensed interim financial statements: - IFRS 4, IFRS 7, IFRS 16, IFRS 9 and IAS 39. Amendments regarding replacement issues in the context of the IBOR reform. This amendment is mandatory for annual periods beginning on or after January 1, 2021 under IFRS-IASB. - IFRS 16. Amendment to extend the exemption from assessing whether a COVID-19-related rent concession is a lease modification. This amendment is mandatory for annual periods beginning on or after April 1, 2021 under IFRS-IASB. The applications of these amendments have not had any material impact on these condensed interim financial statements. b) Standards, interpretations and amendments published by the IASB that will be effective for periods beginning on or after January 1, 2022: - IFRS 1. Amendments resulting from Annual Improvements to IFRS Standards 2018–2020 (subsidiary as a first-time adopter). This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. - IFRS 3. Amendments updating a reference to the Conceptual Framework. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. - IAS 37. Amendments regarding the costs to include when assessing whether a contract is onerous. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB - IFRS 4. Amendments regarding the expiry date of the deferral approach. The fixed expiry date for the temporary exemption in IFRS 4 from applying IFRS 9 is now 1 January 2023. - IFRS 9. Amendments resulting from Annual Improvements to IFRS Standards 2018–2020. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. - IFRS 17. Amendments to address concerns and implementation challenges that were identified after IFRS 17 was published. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 1 (Amendment). Classification of liabilities. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 1. Amendment to defer the effective date of the January 2020 amendment. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 1. (Amendment). Disclosure of accounting policies. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 8. Amendment regarding the definition of accounting estimates. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 12. Amendment regarding deferred tax on leases and decommissioning obligations. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 16. Amendments prohibiting a company from deducting from the cost of property, plant and equipment amounts received from selling items produced while the company is preparing the asset for its intended use. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. The Company does not anticipate any significant impact on the Consolidated Condensed Interim Financial Statements derived from the application of the new standards and amendments that will be effective for annual periods beginning on or after January 1, 2022, although it is currently still in the process of evaluating such application. Use of estimates Some of the accounting policies applied require the application of significant judgment by management to select the appropriate assumptions to determine these estimates. These assumptions and estimates are based on the Company´s historical experience, advice from experienced consultants, forecasts and other circumstances and expectations as of the close of the financial period. The assessment is considered in relation to the global economic situation of the industries and regions where the Company operates, taking into account future development of its businesses. By their nature, these judgments are subject to an inherent degree of uncertainty; therefore, actual results could materially differ from the estimates and assumptions used. In such cases, the carrying values of assets and liabilities are adjusted. The most critical accounting policies, which require significant management estimates and judgment are as follows: ● Assessment of contracted concessional agreements. ● Impairment of contracted concessional assets. ● Assessment of control. ● Derivative financial instruments and fair value estimates. ● Income taxes and recoverable amount of deferred tax assets. As of the date of preparation of these Consolidated Condensed Interim Financial Statements, no relevant changes in estimates made are anticipated and, therefore, no significant changes in the value of assets and liabilities recognized at September 30, 2021, are expected. Although these estimates and assumptions are being made using all available facts and circumstances, it is possible that future events may require management to amend such estimates and assumptions in future periods. Changes in accounting estimates are recognized prospectively, in accordance with IAS 8, in the consolidated income statement of the period in which the change occurs.

Financial risk management

Financial risk management	9 Months Ended
	Sep. 30, 2021
Financial risk management [Abstract]
Financial risk management	Note 3. - Financial risk management Atlantica’s activities are exposed to various financial risks: market risk (including currency risk and interest rate risk), credit risk and liquidity risk. Risk is managed by the Company’s Risk, Finance and Compliance Departments, which are responsible for identifying and evaluating financial risks, quantifying them by project, region and company, in accordance with mandatory internal management rules. Written internal policies exist for global risk management, as well as for specific areas of risk. In addition, there are official written management regulations regarding key controls and control procedures for each company and the implementation of these controls is monitored through internal audit procedures. These Consolidated Condensed Interim Financial Statements do not include all financial risk management information and disclosures required for annual financial statements and should be read together with the information included in Note 3 to Atlantica’s annual consolidated financial statements as of December 31, 2020 included in the 2020 20-F.

Financial information by segmen

Financial information by segment	9 Months Ended
	Sep. 30, 2021
Financial information by segment [Abstract]
Financial information by segment	Note 4. - Financial information by segment Atlantica’s segment structure reflects how management currently makes financial decisions and allocates resources. Its operating and reportable segments are based on the following geographies where the contracted concessional assets are located: North America, South America and EMEA. In addition, based on the type of business, as of September 30, 2021, the Company had the following business sectors: Renewable energy, Efficient natural gas and Heat, Transmission lines and Water. The business sector “Efficient natural gas” has been renamed “Efficient natural gas and Heat” in these Consolidated Condensed Interim Financial Statements as it includes the Calgary District Heating asset acquired in May 2021 (Note 5). Atlantica’s Chief Operating Decision Maker (CODM), which is the CEO, assesses the performance and assignment of resources according to the identified operating segments. The CODM considers the revenue as a measure of the business activity and the Adjusted EBITDA as a measure of the performance of each segment. Adjusted EBITDA is calculated as profit/(loss) for the period attributable to the parent company, after adding back loss/(profit) attributable to non-controlling interests, income tax, share of profit/(loss) of associates carried under the equity method, finance expense net, depreciation, amortization and impairment charges of entities included in these Consolidated Condensed Interim Financial Statements. In order to assess performance of the business, the CODM receives reports of each reportable segment using revenue and Adjusted EBITDA. Net interest expense evolution is assessed on a consolidated basis. Financial expense and amortization are not taken into consideration by the CODM for the allocation of resources. In the nine-month period ended September 30, 2021, Atlantica had two customers with revenues representing more than 10% of total revenue, both in the renewable energy business sector. In the nine-month period ended September 30, 2020, Atlantica had four customers with revenues representing more than 10% of the total revenue, three in the renewable energy and one in the efficient natural gas and heat business sectors. a) The following tables show Revenue and Adjusted EBITDA by operating segments and business sectors for the nine-month periods ended , and : Revenue Adjusted EBITDA For the nine-month period ended September 30, For the nine-month period ended September 30, ($ in thousands) Geography 2021 2020 2021 2020 North America 308,661 267,688 233,810 233,201 South America 117,129 112,019 90,626 89,749 EMEA 514,628 389,027 293,601 286,622 Total 940,418 768,734 618,037 609,572 Revenue Adjusted EBITDA For the nine-month period ended September 30, For the nine-month period ended September 30, ($ in thousands) Business sector 2021 2020 2021 2020 Renewable energy 725,756 579,230 458,170 456,420 Efficient natural gas & Heat 93,524 80,118 73,527 72,412 Transmission lines 80,428 79,229 64,243 64,039 Water 40,710 30,157 22,097 16,701 Total 940,418 768,734 618,037 609,572 The reconciliation of segment Adjusted EBITDA with the profit attributable to the Company is as follows: For the nine-month period ended September 30, ($ in thousands) 2021 2020 Profit/(loss) attributable to the Company (18,166 ) 61,209 Profit/(loss) attributable to non-controlling interests 11,720 (3,042 ) Income tax 42,390 25,079 Share of (profit)/loss of associates carried under the equity method (4,245 ) 2,248 Financial expense, net 251,422 221,911 Depreciation, amortization, and impairment charges 334,916 302,166 Total segment Adjusted EBITDA 618,037 609,572 b) The assets and liabilities by operating segments (and business sector) as of September 30, 2021 and December 31, 2020 are as follows: Assets and liabilities by geography as of September 30, 2021: North America South America EMEA Balance as of September 30, 2021 ($ in thousands) Assets allocated Contracted concessional assets 3,396,242 1,219,002 3,558,673 8,173,917 Investments carried under the equity method 256,250 13 40,699 296,762 Current financial investments 135,664 27,846 44,291 207,801 Cash and cash equivalents (project companies) 242,677 79,908 362,014 684,599 Subtotal allocated 4,030,633 1,326,769 4,005,677 9,363,079 Unallocated assets Other non-current assets 253,170 Other current assets (including cash and cash equivalents at holding company level) 436,369 Subtotal unallocated 689,539 Total assets 10,052,618 North America South America EMEA Balance as of September 30, 2021 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,843,700 902,983 2,532,197 5,278,880 Grants and other liabilities 1,066,410 14,399 190,651 1,271,460 Subtotal allocated 2,910,110 917,382 2,722,848 6,550,340 Unallocated liabilities Long-term and short-term corporate debt 1,030,079 Other non-current liabilities 552,251 Other current liabilities 158,359 Subtotal unallocated 1,740,689 Total liabilities 8,291,029 Equity unallocated 1,761,589 Total liabilities and equity unallocated 3,502,278 Total liabilities and equity 10,052,618 Assets and liabilities by geography as of December 31, 2020: North America South America EMEA Balance as of December 31, 2020 ($ in thousands) Assets allocated Contracted concessional assets 3,073,785 1,211,952 3,869,681 8,155,418 Investments carried under the equity method 74,660 - 41,954 116,614 Current financial investments 129,264 27,836 42,984 200,084 Cash and cash equivalents (project companies) 206,344 70,861 255,530 532,735 Subtotal allocated 3,484,053 1,310,649 4,210,149 9,004,851 Unallocated assets Other non-current assets 242,044 Other current assets (including cash and cash equivalents at holding company level) 691,459 Subtotal unallocated 933,503 Total assets 9,938,354 North America South America EMEA Balance as of December 31, 2020 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,623,284 902,500 2,711,830 5,237,614 Grants and other liabilities 1,078,974 11,355 139,438 1,229,767 Subtotal allocated 2,702,258 913,855 2,851,268 6,467,381 Unallocated liabilities Long-term and short-term corporate debt 993,725 Other non-current liabilities 589,107 Other current liabilities 147,260 Subtotal unallocated 1,730,092 Total liabilities 8,197,473 Equity unallocated 1,740,881 Total liabilities and equity unallocated 3,470,973 Total liabilities and equity 9,938,354 Assets and liabilities by business sector as of September 30, 2021: Renewable energy Efficient natural gas & Heat Transmission lines Water Balance as of September 30, 2021 ($ in thousands) Assets allocated Contracted concessional assets 6,662,219 526,877 814,825 169,996 8,173,917 Investments carried under the equity method 250,104 8,745 - 37,913 296,762 Current financial investments 4,531 135,375 27,705 40,190 207,801 Cash and cash equivalents (project companies) 563,034 51,804 52,975 16,787 684,599 Subtotal allocated 7,479,887 722,801 895,505 264,886 9,363,079 Unallocated assets Other non-current assets 253,170 Other current assets (including cash and cash equivalents at holding company level) 436,369 Subtotal unallocated 689,539 Total assets 10,052,618 Renewable energy Efficient natural gas & Heat Transmission lines Water Balance as of September 30, 2021 ($ in thousands) Liabilities allocated Long-term and short-term project debt 4,073,826 485,198 617,690 102,166 5,278,880 Grants and other liabilities 1,251,956 11,352 5,833 2,319 1,271,460 Subtotal allocated 5,325,782 496,550 623,523 104,485 6,550,340 Unallocated liabilities Long-term and short-term corporate debt 1,030,079 Other non-current liabilities 552,251 Other current liabilities 158,359 Subtotal unallocated 1,740,689 Total liabilities 8,291,029 Equity unallocated 1,761,589 Total liabilities and equity unallocated 3,502,278 Total liabilities and equity 10,052,618 Assets and liabilities by business sector as of December 31, 2020: Renewable energy Efficient natural & Heat Transmission lines Water Balance as of December 31, 2020 ($ in thousands) Assets allocated Contracted concessional assets 6,632,611 502,285 842,595 177,927 8,155,418 Investments carried under the equity method 61,866 15,514 30 39,204 116,614 Current financial investments 6,530 124,872 27,796 40,886 200,084 Cash and cash equivalents (project companies) 397,465 67,955 46,045 21,270 532,735 Subtotal allocated 7,098,472 710,626 916,466 279,287 9,004,851 Unallocated assets Other non-current assets 242,044 Other current assets (including cash and cash equivalents at holding company level) 691,459 Subtotal unallocated 933,503 Total assets 9,938,354 Renewable energy Efficient natural & Heat Transmission lines Water Balance as of December 31, 2020 ($ in thousands) Liabilities allocated Long-term and short-term project debt 3,992,512 504,293 625,203 115,606 5,237,614 Grants and other liabilities 1,221,176 108 6,040 2,443 1,229,767 Subtotal allocated 5,213,688 504,401 631,243 118,049 6,467,381 Unallocated liabilities Long-term and short-term corporate debt 993,725 Other non-current liabilities 589,107 Other current liabilities 147,260 Subtotal unallocated 1,730,092 Total liabilities 8,197,473 Equity unallocated 1,740,881 Total liabilities and equity unallocated 3,470,973 Total liabilities and equity 9,938,354 c) The amount of depreciation, amortization and impairment charges recognized for the nine-month periods ended September 30, 2021 and 2020 are as follows: For the nine-month period ended September 30, Depreciation, amortization and impairment by geography 2021 2020 ($ in thousands) North America (119,196 ) (162,803 ) South America (43,388 ) (26,624 ) EMEA (172,332 ) (112,739 ) Total (334,916 ) (302,166 ) For the nine-month period ended September 30, Depreciation, amortization and impairment by business sectors 2021 2020 ($ in thousands) Renewable energy (334,513 ) (253,617 ) Efficient natural gas & Heat 22,956 (23,616 ) Transmission lines (24,194 ) (24,236 ) Water 836 (697 ) Total (334,916 ) (302,166 )

Business combinations

Business combinations	9 Months Ended
	Sep. 30, 2021
Business combinations [Abstract]
Business combinations	Note 5. – Business combinations For the nine-month period ended September 30, 2021 On January 6, 2021, the Company completed its second investment through its Chilean renewable energy platform in a 40 MW solar PV plant, Chile PV 2, located in Chile, for approximately $5 million. Atlantica has control over Chile PV 2 under IFRS 10, Consolidated Financial Statements. The acquisition of Chile PV 2 has been accounted for in these Consolidated Condensed Interim Financial Statements in accordance with IFRS 3, Business Combinations, showing 65% of non-controlling interests. On January 8, 2021, the Company completed the purchase of an additional 42.5% stake in Rioglass, a supplier of spare parts and services to the solar industry On July the Company exercised the option for , becoming the sole shareholder of the entity. Rioglass is included within the Renewable energy sector and the EMEA geography. On April 7, 2021, the Company closed the acquisition of Coso, a 135 MW renewable asset in California. The purchase price paid was $130 million. Atlantica has control over Coso under IFRS 10, Consolidated Financial Statements and its acquisition has been accounted for in these Consolidated Condensed Interim Financial Statements in accordance with IFRS 3, Business Combinations. Coso is included within the Renewable energy sector and the North America geography. On May 14, 2021, the Company closed the acquisition of Calgary District Heating, a district heating asset of approximately 55 MWt in Canada. The purchase price paid was approximately $22.5 million. The acquisition has been accounted for in these Consolidated Condensed Interim Financial Statements in accordance with IFRS 3, Business Combinations. Calgary District Heating is included within the Efficient natural gas and Heat sector and th e North America geography. On August 6, 2021, the Company closed the acquisition of Agrisun and Re Sole, two solar PV plants in Italy with a combined capacity of 3.7 MW for a total equity investment of $9 million. The acquisition has been accounted for in these Consolidated Condensed Interim Financial Statements in accordance with IFRS 3, Business Combinations. These assets are included within the Renewable Energy sector and the EMEA geography. The fair value of assets and liabilities consolidated at the effective acquisition date is shown in the following table: Business combinations for the nine September 30 2021 ($ in thousands) Coso Other Total Contracted concessional assets 381,160 125,858 507,018 Deferred tax asset - 4,526 4,526 O ther non-current assets 11,024 2,062 13,086 Cash & cash equivalents 6,363 13,976 20,339 Other current assets 16,371 45,900 62,271 Non-current Project debt (248,544 ) (38,804 ) (287,348 ) Current Project debt (13,415 ) (24,167 ) (37,582 ) Deferred tax liabilities - (771 ) (771 ) Other current and non-current liabilities (22,959 ) (63,933 ) (86,892 ) Non-controlling interests - (8,287 ) (8,287 ) Total net assets acquired at fair value 130,000 56,360 186,360 Asset acquisition – purchase price paid (130,000 ) (53,312 ) (183,312 ) Fair value of previously held 15% stake in Rioglass - (3,048 ) (3,048 ) Net result of business combinations - - - The purchase price equals the fair value of the net assets acquired. The allocation of the purchase price is provisional as of September 30, 2021 and amounts indicated above may be adjusted during the measurement period to reflect new information obtained about facts and circumstances that existed at the acquisition date that, if known, would have affected the amounts recognized as of September 30, 2021. The measurement period will not exceed one year from the acquisition dates. In April and May 2021, the provisional period for the purchase price allocation of Chile PV 1 and Tenes, respectively, closed and did not result in significant adjustments to the initial amounts recognized. The amount of revenue contributed by the acquisitions performed during the nine-month period ended September 30, 2021 to the Consolidated Condensed Interim Financial Statements of the Company as of September 30, 2021 is $ 126 million, and the amount of loss after tax is $4.7 million. Had the acquisitions been consolidated from January 1, 2021, the consolidated statement of comprehensive income would have included additional revenue of $14.8 million and additional profit after tax of $1.8 million. For the year ended December 31, 2020 On April 3, 2020, the Company completed the first investment made through the renewable energy platform it created in Chile with financial partners, which comprised a 55 MW solar PV plant, Chile PV 1, located in Chile for approximately $4 million. Atlantica has control over Chile PV 1 under IFRS 10, Consolidated Financial Statements. The acquisition of Chile PV 1 was accounted for in these Consolidated Condensed Interim Financial Statements in accordance with IFRS 3, Business Combinations, showing 65% of non-controlling interest. On May 31, 2020, the Company obtained control over the Board of Directors of Befesa Agua Tenes which owns a 51% stake in Tenes, a water desalination plant in Algeria, and therefore controls the asset. The total investment, in the form of a secured loan agreement to be reimbursed through a full cash-sweep of all the dividends to be received from the asset, amounted to approximately $19 million as of May 31, 2020. The acquisition was accounted for in these Consolidated Condensed Interim Financial Statements of Atlantica, in accordance with IFRS 3, Business Combinations, showing 49% of non-controlling interests. The fair value of assets and liabilities consolidated at the effective acquisition date is shown in the following table: Business combinations for the year-ended December 31, 2020 ($ in thousands) Contracted concessional assets 172,321 Other non-current assets 355 Cash & cash equivalents 17,646 Other current assets 31,422 Non-current Project debt (149,585 ) Current Project debt (8,680 ) Other current and non-current liabilities (15,561 ) Non-controlling interests (25,308 ) Total net assets acquired at fair value 22,610 Asset acquisition - purchase price (22,610 ) Net result of business combinations - The purchase price equals the fair value of the net assets acquired. The allocation of the purchase prices is provisional until one year from the acquisition dates. No significant adjustments were made in 2021 to the fair value of assets and liabilities at the effective acquisition date The amount of revenue contributed by the acquisitions performed during 2020 to the consolidated financial statements of the Company for the year 2020 was $22.5 million, and the amount of profit after tax was $6.3 million. Had the acquisitions been consolidated from January 1, 2020, the consolidated statement of comprehensive income would have included additional revenue of $14.7 million and additional profit after tax of $3.7 million.

Contracted concessional assets

Contracted concessional assets	9 Months Ended
	Sep. 30, 2021
Contracted concessional assets [Abstract]
Contracted concessional assets	Note 6. - Contracted concessional assets The detail of contracted concessional assets included in the heading ‘Contracted concessional assets’ as of September 30, 2021 and December 31, 2020 is as follows: Financial assets under IFRIC 12 Financial assets under IFRS 16 Intangible assets under IFRIC 12 Intangible assets under IFRS 16 (Lessee) Other intangible assets under IAS 38 Property, plant and equipment under IAS 16 Balance as of September 30, 2021 ($ in thousands) Contracted concessional assets cost 891,757 2,895 9,292,599 78,781 21,467 837,960 11,125,459 Amortization and impairment (64,076 ) - (2,706,477 ) (12,602 ) (7,269 ) (161,118 ) (2,951,542 ) Total 827,681 2,895 6,586,122 66,179 14,198 676,842 8,173,917 Financial assets under IFRIC 12 Financial assets under IFRS 16 Intangible assets under IFRIC 12 Intangible assets under IFRS 16 (Lessee) Other intangible assets under IAS 38 Property, plant and equipment under IAS 16 Balance as of December 31, 2020 ($ in thousands) Contracted concessional assets cost 936,837 2,941 9,467,309 66,230 13,800 336,920 10,824,037 Amortization and impairment (87,689 ) - (2,442,520 ) (10,060 ) (6,111 ) (122,240 ) (2,668,619 ) Total 849,149 2,941 7,024,789 56,170 7,689 214,680 8,155,418 Contracted concessional assets include fixed assets related to service concession arrangements recorded in accordance with IFRIC 12, except for Palmucho, which is recorded in accordance with IFRS 16, and PS10, PS20, Seville PV, Mini-Hydro, Chile TL3, ATN Expansion 2, Chile PV 1, Chile PV 2, Calgary, Coso, Agrisun and Re Sole, The increase in the contracted concessional assets cost is primarily due to business combinations for a total amount of $507 million (Note 5), partially offset by Considering the delays in the improvements and replacements that the Company is carrying out in the storage system in Solana and their impact on production in 2021, as well as an increase in the discount rate, the Company identified an impairment triggering event, in accordance with IAS 36, Impairment of assets. As a result, an impairment test has been performed which resulted in the recording of an impairment loss of $43,079 thousand as of September 30, 2021. The impairment has been recorded within the line “Depreciation, amortization and impairment charges” of the consolidated condensed interim income statement, decreasing the amount of “Contracted concessional assets” pertaining to the Renewable energy sector and the North America geography. The recoverable amount considered is the value in use and amounts to $943,255 thousand for Solana, as of September 30, 2021. A specific discount rate has been used in each year considering changes in the debt/equity leverage ratio over the useful life of this project, resulting in the use of a range of discount rates between 4.5% and 5.0%. An adverse change in the key assumptions which are individually used for the valuation could lead to future impairment recognition; specifically, a 5% decrease in generation over the entire remaining useful life (PPA) of the project would generate an additional impairment of approximately $69 million. An increase of 50 basis points in the discount rate would lead to an additional impairment of approximately $41 million. In addition, changes in the provision for expected credit lo

Investments carried under the e

Investments carried under the equity method	9 Months Ended
	Sep. 30, 2021
Investments carried under the equity method [Abstract]
Investments carried under the equity method	Note 7. - Investments carried under the equity method The table below shows the breakdown of the investments held in associates as of September 30, 2021 and December 31, 2020: Balance as of September 30, 2021 Balance as of December 31, 2020 ($ in thousands) 2 007 Vento II, LLC 199,280 - Evacuación Valdecaballeros, S.L. 996 976 Myah Bahr Honaine, S.P.A. 37,913 39,204 Pectonex, R.F. Proprietary Limited 1,517 1,587 Ca Ku A1, S.A.P.I. de CV (PTS) - 30 Windlectric Inc 48,025 59,116 Pemcorp SAPI de CV 8,745 15,514 Other renewable energy associates 286 186 Total 296,762 116,614 2007 Vento II, LLC, is the holding company of a 596 MW portfolio of wind assets in the U.S., 49% owned by Atlantica since June 16, 2021, and accounted for under the equity method in these Consolidated Condensed Interim Financial Statements (Note 1). Myah Bahr Honaine, S.P.A., the project entity, is 51% owned by Geida Tlemcen, S.L., which is accounted for using the equity method in these Consolidate Windlectric Inc., the project entity, is 100% owned by Amherst Island Partnership, which is accounted for under the equity method in these Consolidated Condensed Interim Financial Statements. Pemcorp SAPI de CV, Monterrey´s project entity, is 100% owned by Arroyo Netherlands II B.V., which is accounted for under the equity method in these Consolidated Condensed Interim Financial Statements. Arroyo Netherlands II B.V. is 30% owned by Atlantica. The increase in investments carried under the equity method as of September 30, 2021, is primarily due to the investment in Vento II, which has been partially offset by the distributions received by

Financial investments

Financial investments	9 Months Ended
	Sep. 30, 2021
Financial investments [Abstract]
Financial investments	Note 8. - Financial investments The detail of Non-current and Current financial investments as of September 30, 2021 and December 31, 2020 is as follows: Balance as of September 30, 2021 Balance as of December 31, 2020 ($ in thousands) Fair Value through OCI (Investment in Ten West link) 14,459 12,896 Fair Value through Profit and Loss (Investment in Rioglass) - 2,687 Derivative assets (Note 9) 5,038 1,099 Other receivable accounts at amortized cost 69,369 73,072 Total non-current financial investments 88,866 89,754 Contracted concessional financial assets 188,111 178,198 Derivative assets (Note 9) 1,780 460 Other receivable accounts at amortized cost 17,910 21,426 Total current financial investments 207,801 200,084 The investment in Ten West Link is a 12.5% interest in a 114-mile transmission line in the United States. The investment in Rioglass corresponded to a 15.12% equity interest as of December 31, 2020. The Company gained control over the business in January 2021, which is fully consolidated since then in these Consolidated Condensed Interim Financial Statements

Derivative financial instrument

Derivative financial instruments	9 Months Ended
	Sep. 30, 2021
Derivative financial instruments [Abstract]
Derivative financial instruments	Note 9. - Derivative financial instruments The breakdowns of the fair value amount of the derivative financial instruments as of September 30, 2021 and December 31, 2020 are as follows: Balance as of September 30, 2021 Balance as of December 31, 2020 ($ in thousands) Assets Liabilities Assets Liabilities Interest rate cash flow hedge 4,101 237,664 898 302,302 Foreign exchange derivatives instruments 2,717 - 661 - Notes conversion option (Note 14) - 11,975 - 25,882 Total 6,818 249,639 1,559 328,184 The derivatives are primarily interest rate cash flow hedges. All are classified as non-current assets or non-current liabilities, as they hedge long-term financing agreements. The net amount of the fair value of interest rate derivatives designated as cash flow hedges transferred to the consolidated condensed income statement is a loss of $44.6 million for the nine-month period ended September 30, 2021 (loss of $43.8 million for the nine-month period ended September 30, 2020). The after-tax results accumulated in equity in connection with derivatives designated as cash flow hedges as of September 30, 2021 and December 31, 2020 amount to a profit of $147.9 million and $96.6 million, respectively. Additionally, the Company owns the following derivatives instruments: - currency options with leading international financial institutions, which guarantee minimum Euro-U.S. dollar exchange rates. The strategy of the Company is to hedge the exchange rate for the distributions from its Spanish assets after deducting euro-denominated interest payments and euro-denominated general and administrative expenses. Through currency options, the Company hedges 100% of its euro-denominated net exposure for the next 12 months and 75% of its euro denominated net exposure for the following 12 months, on a rolling basis. Hedge accounting is not applied to these options. - the conversion option of the Green Exchangeable Notes issued in July 2020 (Note 14), with a negative fair value of $ million as of September 30, 2021 recorded as a derivative liability (derivative liability of $ million as of December 31, 2020).

Fair value of financial instrum

Fair value of financial instruments	9 Months Ended
	Sep. 30, 2021
Fair value of financial instruments [Abstract]
Fair value of financial instruments	Note 10. - Fair value of financial instruments Financial instruments measured at fair value are classified based on the nature of the inputs used for the calculation of fair value: ● Level 1: Inputs are quoted prices in active markets for identical assets or liabilities. ● Level 2: Fair value is measured based on inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices). ● Level 3: Fair value is measured based on unobservable inputs for the asset or liability. As of September 30, 2021, all the financial instruments measured at fair value correspond to derivatives and have been classified as Level 2, except for the investments held in Ten West Link, which has been classified as Level 3. As of December 31, 2020, these Consolidated Condensed Interim Financial Statements also included the investment in Rioglass (Note 8), which was classified as Level 3.

Related parties

Related parties	9 Months Ended
	Sep. 30, 2021
Related parties [Abstract]
Related parties	Note 11. - Related parties The related parties of the Company are primarily Algonquin and its subsidiaries, non-controlling interests (Note 13), entities accounted for under the equity method (Note 7), as well as the Directors and the Senior Management of the Company. Details of balances with related parties as of September 30, 2021 and December 31, 2020 are as follows: Balance as of September 30, Balance as of December 31, ($ in thousands) 2021 2020 Credit receivables (current) 20,101 23,067 Credit receivables (non-current) 15,182 10,082 Total receivables from related parties 35,283 33,149 Credit payables (current) 6,379 18,477 Credit payables (non-current) 5,700 6,810 Total payables to related parties 12,079 25,287 Current credit receivables as of September 30, 2021 mainly correspond to the short-term portion of the loan to Arroyo Netherland II B.V., the holding company of Pemcorp SAPI de CV., Monterrey´s project entity (Note 7) for $16.9 million ($15.5 million as of December 31, 2020). Non-current credit receivables as of September 30, 2021 and December 31, 2020 correspond to the long-term portion of the loan to Arroyo Netherland II B.V. Credit payables relate to debts with non-controlling partners in Kaxu, Solaben 2 & 3 and Solacor 1 & 2 for an amount of $9.6 million as of September 30, 2021 ($21.1 million as of December 31, 2020). The decrease is primarily due to debt repayment at Kaxu. Current credit payables also include the dividend to be paid by AYES Canada to Algonquin for $2.4 million as of September 30, 2021 ($4.2 million as of December 31, 2020). The transactions carried out by entities included in these Consolidated Condensed Interim Financial Statements with related parties, for the nine-month periods ended September 30, 2021 and 2020 have been as follows: For the nine-month period ended September 30, 2021 2020 ($ in thousands) Financial income 1,547 1,493 Financial expenses (89 ) (119 )

Trade and other receivables

Trade and other receivables	9 Months Ended
	Sep. 30, 2021
Trade and other receivables [Abstract]
Trade and other receivables	Note 12. - Trade and other receivables Trade and other receivables as of September 30, 2021 and December 31, 2020, consist of the following: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Trade receivables 236,406 258,088 Tax receivables 56,554 50,663 Prepayments 22,616 12,074 Other accounts receivable 8,691 10,910 Total 324,267 331,735 The decrease in trade receivables is primarily due to payments received from Pemex in ACT, partially offset by the increase due to business combinations for a total amount of $28 million (Note 5). The increase in prepayments is primarily due to the timing of insurance payments. As of September 30, 2021, and December 31, 2020, the fair value of trade and other receivables accounts does not differ significantly from its carrying value.

Equity

Equity	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Equity	Note 13. - Equity As of September 30, 2021, the share capital of the Company amounts to $11,147,726 represented by 111,477,263 ordinary shares fully subscribed and disbursed with a nominal value of $0.10 each, all in the same class and series. Each share grants one voting right. Algonquin owns 43.9% of the shares of the Company and is its largest shareholder as of September 30,2021. On December 11, 2020 the Company closed an underwritten public offering of 5,069,200 ordinary shares, including 661,200 ordinary shares sold pursuant to the full exercise of the underwriters’ over-allotment option, at a price of $33 per new share. Gross proceeds were approximately $167 million. Given that the offering was issued through a subsidiary in Jersey, which became wholly owned by the Company at closing, and subsequently liquidated, the premium on issuance was credited to a merger reserve account (Capital reserves), net of issuance costs, for $161 million. Additionally, Algonquin committed to purchase 4,020,860 ordinary shares in a private placement in order to maintain its previous equity ownership of 44.2% in the Company. The private placement closed on January 7, 2021. Gross proceeds were approximately $133 million. During the first quarter of 2021, the Company changed the accounting treatment applied to its existing long-term incentive plans granted to employees from cash-settled to equity-settled in accordance with IFRS 2, Share-based Payment, as a result of incentives being settled in shares. The liability recognized for the rights vested by the employees under such plans at the date of this change, was reclassified to equity within the line “Accumulated deficit” for approximately $9 million. The settlement in shares was approved by the Board of Directors on February 26, 2021, and the Company issued 141,482 new shares to its employees since then, to settle a portion of these plans. On August 3, 2021, the Company established an “at-the-market program” (the “ATM”) and entered into the distribution agreement with J.P. Morgan Securities LLC, as sales agent, (the “Distribution Agreement”) under which the Company may offer and sell from time to time up to $150 million of its ordinary shares. The Company also entered into an agreement with Algonquin pursuant to which the Company has offered Algonquin the right but not the obligation, on a quarterly basis, to purchase a number of ordinary shares to maintain its percentage interest in Atlantica at the average price of the shares sold under the Distribution Agreement in the previous quarter (the “ATM Plan Letter Agreement”). During the third quarter of 2021, the Company issued and sold 644,059 shares at an average market price of $38.18 pursuant to its Distribution Agreement, representing net proceeds of $24 million. Pursuant to the ATM Plan Letter Agreement, the Company will deliver a notice to Algonquin quarterly in order for them to exercise their rights thereunder. Atlantica´s reserves as of September 30, 2021 are made up of the share premium account and capital reserves. The share premium account reduction by $200,000 thousand during the nine-month period ended September 30, 2021, increasing capital reserves by the same amount, was made effective upon the confirmation received from the High Court in the UK, pursuant to the Companies Act 2006. Other reserves primarily include the change in fair value of cash flow hedges and its tax effect. Accumulated currency translation differences primarily include the result of translating the financial statements of subsidiaries prepared in a foreign currency into the presentation currency of the Company, the U.S. dollar. Accumulated deficit primarily includes results attributable to Atlantica. Non-controlling interests fully relate to interests held by JGC in Solacor 1 and Solacor 2, by Idae in Seville PV, by Itochu Corporation in Solaben 2 and Solaben 3, by Algerian Energy Company, SPA and Sacyr Agua S.L. in Skikda , by Algerian Energy Company, SPA in Tenes, by Industrial Development Corporation of South Africa (IDC) and Kaxu Community Trust in Kaxu, by Algonquin Power Co. in AYES Canada, and by partners of the Company in the Chilean renewable energy platform in Chile PV 1 and Chile PV 2. On February 26, 2021, the Board of Directors declared a dividend of $0.42 per share corresponding to the fourth quarter of 2020. The dividend was paid on March 22, 2021 for a total amount of $46.5 million. On May 4, 2021, the Board of Directors declared a dividend of $0.43 per share corresponding to the first quarter of 2021. The dividend was paid on June 15, 2021 for a total amount of $47.7 million. On July 30, 2021, the Board of Directors declared a dividend of $0.43 per share corresponding to the second quarter of 2021. The dividend was paid on September 15, 2021 for a total amount of $47.8 million. In addition, the Company declared dividends to non-controlling interests, primarily to Algonquin (interests in Amherst through AYES Canada, see Note 7) for $11.1 million in the nine-month period ended September 30, 2021 ($10.7 million in the nine-month period ended September 30, 2020) As of September 30, 2021, there was no treasury stock and there have been no transactions with treasury stock during the nine-month period then ended.

Corporate debt

Corporate debt	9 Months Ended
	Sep. 30, 2021
Corporate debt [Abstract]
Corporate debt	Note 14. - Corporate debt The breakdown of corporate debt as of September 30, 2021 and December 31, 2020 is as follows: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Non-current 1,009,128 970,077 Current 20,951 23,648 Total Corporate Debt 1,030,079 993,725 On July 20, 2017, the Company signed a credit facility (the “2017 Credit Facility”) for up to €10 million, approximately $11.6 million, which is available in euros or U.S. dollars. Amounts drawn down accrue interest at a rate per year equal to EURIBOR plus 2% or LIBOR plus 2%, depending on the currency, with a floor of 0% on the LIBOR and EURIBOR. As of September 30, 2021, and December 31, 2020, the 2017 Credit Facility was fully available. The credit facility maturity is July 1, 2023. On May 10, 2018, the Company entered into the Revolving Credit Facility for $215 million with a syndicate of banks. Amounts drawn down accrue interest at a rate per year equal to (A) for Eurodollar rate loans, LIBOR plus a percentage determined by reference to the leverage ratio of the Company, ranging between 1.60% and 2.25% and (B) for base rate loans, the highest of (i) the rate per annum equal to the weighted average of the rates on overnight U.S. Federal funds transactions with members of the U.S. Federal Reserve System arranged by U.S. Federal funds brokers on such day plus ½ On April 30, 2019, the Company entered into the Note Issuance Facility 2019, a senior unsecured note facility with a group of funds managed by Westbourne Capital as purchasers of the notes issued thereunder for a total amount of €268 million, approximately $310 million, with maturity date on April 30, 2025. Interest accrues at a rate per annum equal to the sum of 3-month EURIBOR plus 4.50%. The interest rate on the Note Issuance Facility 2019 is fully hedged by an interest rate swap resulting in the Company paying a net fixed interest rate of 4.24%. The Note Issuance Facility 2019 provided that the Company may capitalize interest on the notes issued thereunder for a period of up to two years from closing at the Company´s discretion, subject to certain conditions, and the Company elected to capitalize such interest until the end of 2020. The Note Issuance Facility 2019 has been fully repaid on June 4, 2021, and subsequently delisted from the Official List of The International Stock Exchange. On October 8, 2019, the Company filed a euro commercial paper program (the “Commercial Paper”) with the Alternative Fixed Income Market (MARF) in Spain. The program had an original maturity of twelve months and was extended for another twelve-month period on October 8, 2020. The program allowed Atlantica to issue short term notes over the next twelve months for up to €50 million (approximately $58 million), with such notes having a tenor of up to two years. As of September 30, 2021, the Company had €11.5 million (approximately $13.3 million) issued and outstanding under the program at an average cost of 0.53% (€17.4 million, approximately $20.1 million, as of December 31, 2020). On April 1, 2020, the Company closed the secured 2020 Green Private Placement for €290 million (approximately $336 million). The private placement accrues interest at an annual 1.96% interest rate, payable quarterly and has a June 2026 maturity. On July 8, 2020, the Company entered into the Note Issuance Facility 2020, a senior unsecured financing with a group of funds managed by Westbourne Capital as purchasers of the notes issued thereunder for a total amount of approximately $162 million, which is denominated in euros (€140 million). The Note Issuance Facility 2020 was issued on August 12, 2020, accrues annual interest of 5.25%, payable quarterly and has a maturity of seven years from the closing date. On July 17, 2020, the Company issued the Green Exchangeable Notes for $100 million in aggregate principal amount of 4.00% convertible bonds due in 2025. On July 29, 2020, the Company closed an additional $15 million aggregate principal amount in. The notes mature on July 15, 2025 and bear interest at a rate of 4.00% per annum. The initial exchange rate of the notes is 29.1070 ordinary shares per $1,000 principal amount of notes, which is equivalent to an initial exchange price of $34.36 per ordinary share. Noteholders may exchange their notes at their option, at any time prior to the close of business on the scheduled trading day immediately preceding April 15, 2025, only during certain periods and upon satisfaction of certain conditions. On or after April 15, 2025, noteholders may exchange their notes at any time. Upon exchange, the notes may be settled, at the election of the Company, into Atlantica ordinary shares, cash or a combination thereof. The exchange rate is subject to adjustment upon the occurrence of certain events. As per IAS 32, “Financial Instruments: Presentation”, the conversion option of the Green Exchangeable Notes is an embedded derivative classified within the line “Derivative liabilities” of these Consolidated Condensed Interim Financial Statements (Note 9). It was initially valued at the transaction date for $10 million, and prospective changes to its fair value are accounted for directly through the profit and loss statement. The principal element of the Green Exchangeable Notes, classified within the line “Corporate debt” of these Consolidated Condensed Interim Financial Statements, is initially valued as the difference between the consideration received from the holders of the instrument and the value of the embedded derivative, and thereafter, at amortized cost using the effective interest method as per IFRS 9, “Financial Instruments”. On December 4, 2020, the Company entered into a loan with a bank (Bank loan) for €5 million, approximately $5.8 million. The Bank loan accrues interest at a rate per year equal to 2.50%. The maturity date is December 4, 2025. On May 18, 2021, the Company issued the Green Senior Notes due in 2028 in an aggregate principal amount of $400 million. The notes mature on May 15, 2028 and bear interest at a rate of 4.125% per annum payable on June 15 and December 15 of each year, commencing December 15, 2021. The repayment schedule for the corporate debt as of September 30, 2021 is as follows: Remainder of 2021 Between January and September 2022 Between October and December 2022 2023 2024 2025 Subsequent years Total ($ in thousands) 2017 Credit Facility 20 - - - - - - 20 Revolving Credit Facility 12 - - 13,631 - - - 13,643 Commercial Paper 9,262 4,026 - - - - - 13,288 2020 Green Private Placement 329 - - - - - 333,022 333,351 Note Issuance Facility 2020 - - - - - - 158,551 158,551 Green Exchangeable Notes 967 - - - - 103,963 - 104,930 Bank loan 10 - - 1,930 1,930 1,894 - 5,764 Green Senior Notes 6,325 - - - - - 394,207 400,532 Total 16,925 4,026 - 15,561 1,930 105,857 885,780 1,030,079 The repayment schedule for the corporate debt as of December 31, 2020 was as follows 2021 2022 2023 2024 2025 Subsequent years Total ($ in thousands) 2017 Credit Facility 41 - - - - - 41 Notes Issuance Facility 2019 - - - - 343,999 - 343,999 Commercial Paper 21,224 - - - - - 21,224 2020 Green Private Placement 289 - - - - 351,026 351,315 Note Issuance Facility 2020 - - - - - 166,846 166,846 Green Exchangeable Notes 2,083 - - - 102,144 - 104,227 Bank loan 11 - 2,036 2,036 1,990 - 6,073 Total 23,648 - 2,036 2,036 448,133 517,872 993,725

Project debt

Project debt	9 Months Ended
	Sep. 30, 2021
Project debt [Abstract]
Project debt	Note 15. - Project debt This note shows the project debt linked to the contracted concessional assets included in Note 6 of these Consolidated Condensed Interim Financial Statements. Project debt is generally used to finance contracted assets, exclusively using as guarantee the assets and cash flows of the company or group of companies carrying out the activities financed. In addition, the cash of the Company´s projects includes funds held to satisfy the customary requirements of certain non-recourse debt agreements and other restricted cash for an amount of $287 million as of September 30, 2021 ($280 million as of December 31, 2020). The breakdown of project debt for both non-current and current liabilities as of September 30, 2021 and December 31, 2020 is as follows: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Non-current 4,568,387 4,925,268 Current 710,493 312,346 Total Project debt 5,278,880 5,237,614 The increase in total project debt as of September 30, 2021 is primarily due to business combinations for a total amount of $325 million (Note 5), partially offset by the lower value of debt denominated in Euros given the depreciation of the Euro against the U.S. dollar since December 31, 2020, and the repayment of project debt for the period in accordance with the financing arrangements. The Kaxu project financing arrangement contains cross-default provisions related to Abengoa such that debt defaults by Abengoa, subject to certain threshold amounts and/or a restructuring process, could trigger a default under the Kaxu project financing arrangement. The insolvency filing by the individual company Abengoa S.A. in February 2021 represents a theoretical event of default under the Kaxu project finance agreement. In September 2021, the Company obtained a waiver for such theoretical event of default which is conditional upon the replacement of the operation and maintenance supplier of the plant, which is currently an Abengoa subsidiary, before October 31, 2021. On November 4, 2021, the Company obtained an extension of the term for such replacement until January 31, 2022. Although the Company does not expect the acceleration of debt to be declared by the credit entities, as of September 30, 2021 Kaxu did not have what International Accounting Standards define as an unconditional right to defer the settlement of the debt for at least twelve months, as the cross-default provisions make that right conditional. Therefore, Kaxu total debt (Note 15) has been presented as current in the Consolidated Condensed Interim Financial Statements of the Company as of September 30, 2021 for an amount of $349 million, in accordance with International Accounting Standards 1 (“IAS 1”), “Presentation of Financial Statements”. The repayment schedule for project debt in accordance with the financing arrangements and assuming there will be no acceleration of the Kaxu debt, as of September 30, 2021, is as follows and is consistent with the projected cash flows of the related projects: Remainder of 2021 Interest payment Nominal repayment Between January and September 2022 Between October December 2022 2023 2024 2025 Subsequent years Total ($ in thousands) 59,366 163,975 166,131 163,122 359,313 373,083 504,196 3,489,692 5,278,880 The repayment schedule for project debt in accordance with the financing arrangements as of December 31, 2020, was as follows and was consistent with the projected cash flows of the related projects: 2021 2022 2023 2024 2025 Subsequent years Total ($ in thousands) Interest payment Nominal repayment 19,287 293,059 328,364 355,806 371,548 508,843 3,360,707 5,237,614

Grants and other liabilities

Grants and other liabilities	9 Months Ended
	Sep. 30, 2021
Grants and other liabilities [Abstract]
Grants and other liabilities	Note 16. - Grants and other liabilities Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Grants 986,914 1,028,765 Other Liabilities 284,546 201,002 Grants and other non-current liabilities 1,271,460 1,229,767 As of September 30, 2021, the amount recorded in Grants primarily corresponds to the ITC Grant awarded by the U.S. Department of the Treasury to Solana and Mojave for a total amount of $650 million ($674 million as of December 31, 2020). The amount recorded in Grants as a liability is progressively recorded as other income over the useful life of the asset. The remaining balance of the “Grants” account corresponds to loans with interest rates below market rates for Solana and Mojave for a total amount of $332 million ($352 million as of December 31, 2020). Loans with the Federal Financing Bank guaranteed by the Department of Energy for these projects bear interest at a rate below market rates for these types of projects and terms. The difference between proceeds received from these loans and its fair value, is initially recorded as “Grants” in the consolidated statement of financial position, and subsequently recorded progressively in “Other operating income”. Total amount of income for these two types of grants for Solana and Mojave is $44.1 million and $44.2 million for the nine-month periods ended September 30, 2021 and 2020, respectively (Note 20). Other liabilities primarily include $60 million of non-current finance lease liabilities and $125 million of dismantling provisions as of September 30, 2021 ($52 million and $88 million as of December 2020, respectively).

Trade payables and other curren

Trade payables and other current liabilities	9 Months Ended
	Sep. 30, 2021
Trade payables and other current liabilities [Abstract]
Trade payables and other current liabilities	Note 17. - Trade payables and other current liabilities Trade payables and other current liabilities as of September 30, 2021 and December 31, 2020 are as follows: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Trade accounts payable 75,547 54,219 Down payments from clients 5,460 416 Other accounts payable 37,593 37,922 Total 118,600 92,557 Trade accounts payable mainly relate to the operation and maintenance of the plants. Nominal values of trade payables and other current liabilities are considered to be approximately equal to fair values and the effect of discounting them is not significant.

Income Tax

Income Tax	9 Months Ended
	Sep. 30, 2021
Income Tax [Abstract]
Income Tax	Note 18. - Income Tax The effective tax rate for the periods presented has been established based on Management’s best estimates, taking into account the tax treatment of permanent differences and tax credits. For the nine-month period ended September 30, 2021, income tax amounted to a $42,390 thousand expense with respect to a profit before income tax of $35,944 thousand. In the nine-month period ended September 30, 2020, income tax amounted to a $25,079 thousand expense with respect to a profit before income tax of $83,246 thousand. The effective tax rate differs from the nominal tax rate mainly due to unrecognized tax loss carryforwards, provisions for potential tax contingencies and permanent tax differences in some jurisdictions.

Financial expense, net

Financial expense, net	9 Months Ended
	Sep. 30, 2021
Financial expense, net [Abstract]
Financial expense, net	Note 19. - Financial expense, net Financial income and expenses The following table sets forth financial income and expenses for the nine-month periods ended September 30, 2021 and 2020: For the nine-month period ended September 30, Financial income 2021 2020 ($ in thousands) Interest income from loans and credits 1,549 6,124 Interest rate gains on derivatives: cash flow hedges 299 288 Total 1,848 6,413 For the nine September 30 Financial expenses 2021 2020 Expenses due to interest: ($ in thousands) - Loans from credit entities (180,898 ) (186,769 ) - Other debts (51,167 ) (56,578 ) Interest rate losses on derivatives: cash flow hedges (44,935 ) (46,092 ) Total (277,000 ) (289,439 ) Interest from other debts is primarily interest on the notes issued by ATS, ATN, Solaben Luxembourg, Hypesol Solar Inversiones (the company financing the Helios projects), Atlantica Sustainable Infrastructure plc. and Atlantica Sustainable Infrastructure Jersey. The decrease in the nine-month period ended September 30, 2021 is primarily due to the acquisition of Liberty’s equity interest in Solana in August 2020, which was accounted for as a liability in these Consolidated Condensed Interim Financial Statements, in accordance with IAS 32. Losses from interest rate derivatives designated as cash flow hedges primarily correspond to transfers from equity to financial expense when the hedged item impacts the consolidated income statement. Net exchange differences Net exchange differences primarily correspond to realized and unrealized exchange gains and losses on transactions in foreign currencies as part of the normal course of business of the Company. Other financial income and expenses The following table sets out Other financial income and expenses for the nine-month periods ended September 30, 2021, and 2020: For the nine September 30 Other financial income / (expenses) 2021 2020 ($ in thousands) Other financial income 35,355 162,984 Other financial losses (13,671 ) (100,387 ) Total 21,684 62,597 Other financial income in the nine-month period ended September 30, 2021, includes $5.6 million of income for non-monetary change to the fair value of derivatives of Kaxu for which hedge accounting is not applied, and $13.9 million income further to the change in the fair value of the conversion option of the Green Exchangeable Notes since December 2020 (Note 14). The decrease of other financial income is primarily due to the gain of $145 million further to the purchase of Liberty’s equity interest in Solana accounted for in the third quarter of 2020. Residual items primarily relate to interest on deposits and loans, including non-monetary changes to the amortized cost of such loans. Other financial losses include guarantees and letters of credit, other bank fees, non-monetary changes to the fair value of derivatives for which hedge accounting is not applied and of financial instruments recorded at fair value through profit and loss, and other minor financial expenses. The decrease is primarily due to $72 million of financial expenses further to the refinancing of the Helios 1&2 debts accounted for in the third quarter of 2020.

Other operating income and expe

Other operating income and expenses	9 Months Ended
	Sep. 30, 2021
Other operating income and expenses [Abstract]
Other operating income and expenses	Note 20.- Other operating income and expenses The table below shows the detail of Other operating income and expenses for the nine-month periods ended September 30, 2021, and 2020: Other operating income For the nine-month period ended September 30, 2021 2020 ($ in thousands) Grants (Note 16) 44,449 44,256 Insurance proceeds and other 13,148 31,646 Total 57,597 75,902 Other operating expenses For the nine September 30 2021 2020 ($ in thousands) Raw materials and consumables used (64,756 ) (4,919 ) Leases and fees (6,451 ) (2,388 ) Operation and maintenance (117,750 ) (77,133 ) Independent professional services (27,297 ) (28,509 ) Supplies (25,270 ) (20,433 ) Insurance (33,943 ) (27,990 ) Levies and duties (25,948 ) (30,523 ) Other expenses (19,457 ) (5,740 ) Total (320,873 ) (197,635 ) The increase in Other operating expenses in 2021 is primarily due to the business combinations made effective during the nine-month period ended September 30, 2021 (Note 5).

Earnings per share

Earnings per share	9 Months Ended
	Sep. 30, 2021
Earnings per share [Abstract]
Earnings per share	Note 21. - Earnings per share Basic earnings per share have been calculated by dividing the profit/(loss) attributable to equity holders by the average number of outstanding shares. Diluted earnings per share for the nine-month period ended September 30, 2021 have been calculated considering the potential issuance of 3,347,305 shares on the settlement of the Green Exchangeable Notes (Note 14) and the potential issuance of 510,169 shares to Algonquin under the agreement signed on August 3, 2021, according to which Algonquin has the option, on a quarterly basis, to subscribe such number of shares to maintain its percentage in Atlantica in relation to the use of the ATM program (Note 13). Diluted earnings per share for the nine-month period ended September 30, 2020 was calculated considering the potential issuance of 3,347,305 shares on the settlement of the Green Exchangeable Notes. Item For the nine September 30 2021 2020 ($ in thousands) Profit/(loss) attributable to Atlantica (18,166 ) 61,209 Average number of ordinary shares outstanding (thousands) - basic 110,749 101,602 Average number of ordinary shares outstanding (thousands) - diluted 114,156 102,499 Earnings per share for the period (U.S. dollar per share) - basic (0.16 ) 0.60 Earnings per share for the period (U.S. dollar per share) - diluted (0.16 ) 0.60

Subsequent events

Subsequent events	9 Months Ended
	Sep. 30, 2021
Subsequent events [Abstract]
Subsequent events	Note 22. - Subsequent events On November 4, 2021, the company obtained an extension of the term for the replacement of the operation and maintenance supplier of the Kaxu plant until January 31, 2022 (Note 1). On November 9, 2021, the Board of Directors of the Company approved a dividend of $0.435 per share, which is expected to be paid on December 15, 2021.

Basis of preparation (Policies)

Basis of preparation (Policies)	9 Months Ended
	Sep. 30, 2021
Basis of preparation [Abstract]
Basis of preparation	The accompanying Consolidated Condensed Interim Financial Statements represent the consolidated results of the Company and its subsidiaries. The Company’s annual consolidated financial statements as of December 31, 2020, were approved by the Board of Directors on February 26, 2021. These Consolidated Condensed Interim Financial Statements are presented in accordance with International Accounting Standards (“IAS”) 34, “Interim Financial Reporting”. In accordance with IAS 34, interim financial information is prepared solely in order to update the most recent annual consolidated financial statements prepared by the Company, placing emphasis on new activities, occurrences and circumstances that have taken place during the nine-month period ended September 30, 2021, and not duplicating the information previously published in the annual consolidated financial statements for the year ended December 31, 2020. Therefore, the Consolidated Condensed Interim Financial Statements do not include all the information that would be required in a complete set of consolidated financial statements prepared in accordance with the IFRS-IASB (“International Financial Reporting Standards-International Accounting Standards Board”). In view of the above, for an adequate understanding of the information, these Consolidated Condensed Interim Financial Statements must be read together with Atlantica’s consolidated financial statements for the year ended December 31, 2020 included in the 2020 20-F. In determining the information to be disclosed in the notes to the Consolidated Condensed Interim Financial Statements, Atlantica, in accordance with IAS 34, has taken into account its materiality in relation to the Consolidated Condensed Interim Financial Statements. The Consolidated Condensed Interim Financial Statements are presented in U.S. dollars, which is the Company’s functional and presentation currency. Amounts included in these Consolidated Condensed Interim Financial Statements are all expressed in thousands of U.S. dollars, unless otherwise indicated. These Consolidated Condensed Interim Financial Statements were approved by the Board of Directors of the Company on November 9, 2021.
Application of new accounting standards	Application of new accounting standards a) Standards, interpretations and amendments effective from January 1, 2021 under IFRS-IASB, applied by the Company in the preparation of these condensed interim financial statements: - IFRS 4, IFRS 7, IFRS 16, IFRS 9 and IAS 39. Amendments regarding replacement issues in the context of the IBOR reform. This amendment is mandatory for annual periods beginning on or after January 1, 2021 under IFRS-IASB. - IFRS 16. Amendment to extend the exemption from assessing whether a COVID-19-related rent concession is a lease modification. This amendment is mandatory for annual periods beginning on or after April 1, 2021 under IFRS-IASB. The applications of these amendments have not had any material impact on these condensed interim financial statements. b) Standards, interpretations and amendments published by the IASB that will be effective for periods beginning on or after January 1, 2022: - IFRS 1. Amendments resulting from Annual Improvements to IFRS Standards 2018–2020 (subsidiary as a first-time adopter). This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. - IFRS 3. Amendments updating a reference to the Conceptual Framework. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. - IAS 37. Amendments regarding the costs to include when assessing whether a contract is onerous. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB - IFRS 4. Amendments regarding the expiry date of the deferral approach. The fixed expiry date for the temporary exemption in IFRS 4 from applying IFRS 9 is now 1 January 2023. - IFRS 9. Amendments resulting from Annual Improvements to IFRS Standards 2018–2020. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. - IFRS 17. Amendments to address concerns and implementation challenges that were identified after IFRS 17 was published. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 1 (Amendment). Classification of liabilities. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 1. Amendment to defer the effective date of the January 2020 amendment. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 1. (Amendment). Disclosure of accounting policies. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 8. Amendment regarding the definition of accounting estimates. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 12. Amendment regarding deferred tax on leases and decommissioning obligations. This amendment is mandatory for annual periods beginning on or after January 1, 2023 under IFRS-IASB. - IAS 16. Amendments prohibiting a company from deducting from the cost of property, plant and equipment amounts received from selling items produced while the company is preparing the asset for its intended use. This amendment is mandatory for annual periods beginning on or after January 1, 2022 under IFRS-IASB. The Company does not anticipate any significant impact on the Consolidated Condensed Interim Financial Statements derived from the application of the new standards and amendments that will be effective for annual periods beginning on or after January 1, 2022, although it is currently still in the process of evaluating such application.
Use of estimates	Use of estimates Some of the accounting policies applied require the application of significant judgment by management to select the appropriate assumptions to determine these estimates. These assumptions and estimates are based on the Company´s historical experience, advice from experienced consultants, forecasts and other circumstances and expectations as of the close of the financial period. The assessment is considered in relation to the global economic situation of the industries and regions where the Company operates, taking into account future development of its businesses. By their nature, these judgments are subject to an inherent degree of uncertainty; therefore, actual results could materially differ from the estimates and assumptions used. In such cases, the carrying values of assets and liabilities are adjusted. The most critical accounting policies, which require significant management estimates and judgment are as follows: ● Assessment of contracted concessional agreements. ● Impairment of contracted concessional assets. ● Assessment of control. ● Derivative financial instruments and fair value estimates. ● Income taxes and recoverable amount of deferred tax assets. As of the date of preparation of these Consolidated Condensed Interim Financial Statements, no relevant changes in estimates made are anticipated and, therefore, no significant changes in the value of assets and liabilities recognized at September 30, 2021, are expected. Although these estimates and assumptions are being made using all available facts and circumstances, it is possible that future events may require management to amend such estimates and assumptions in future periods. Changes in accounting estimates are recognized prospectively, in accordance with IAS 8, in the consolidated income statement of the period in which the change occurs.

Fair value of financial instr_2

Fair value of financial instruments (Policies)	9 Months Ended
	Sep. 30, 2021
Fair value of financial instruments [Abstract]
Fair value of financial instruments	Financial instruments measured at fair value are classified based on the nature of the inputs used for the calculation of fair value: ● Level 1: Inputs are quoted prices in active markets for identical assets or liabilities. ● Level 2: Fair value is measured based on inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices). ● Level 3: Fair value is measured based on unobservable inputs for the asset or liability. As of September 30, 2021, all the financial instruments measured at fair value correspond to derivatives and have been classified as Level 2, except for the investments held in Ten West Link, which has been classified as Level 3. As of December 31, 2020, these Consolidated Condensed Interim Financial Statements also included the investment in Rioglass (Note 8), which was classified as Level 3.

Nature of the business (Tables)

Nature of the business (Tables)	9 Months Ended
	Sep. 30, 2021
Nature of the business [Abstract]
Overview of main assets	The following table provides an overview of the main contracted concessional assets the Company owned or had an interest in as of September 30, 2021: Assets Type Ownership Location Currency (9) Capacity (Gross) Counterparty Credit Ratings (10) COD* Contract Years Remaining (16) Solana Renewable (Solar) 100% Arizona (USA) USD 280 MW A-/A2/BBB+ 2013 22 Mojave Renewable (Solar) 100% California (USA) USD 280 MW BB-/WR/BB 2014 18 Chile PV 1 Renewable (Solar) 35% (8) Chile USD 55 MW N/A 2016 N/A Chile PV 2 Renewable (Solar) 35% (8) Chile USD 40 MW N/A 2017 N/A Solaben 2 & 3 Renewable (Solar) 70% (1) Spain Euro 2x50 MW A/Baa1/A- 2012 16/16 Solacor 1 & 2 Renewable (Solar) 87% (2) Spain Euro 2x50 MW A/Baa1/A- 2012 16/16 PS10 & PS20 Renewable (Solar) 100% Spain Euro 31 MW A/Baa1/A- 2007&2009 11/13 Helioenergy 1 & 2 Renewable (Solar) 100% Spain Euro 2x50 MW A/Baa1/A- 2011 15/15 Helios 1 & 2 Renewable (Solar) 100% Spain Euro 2x50 MW A/Baa1/A- 2012 16/16 Solnova 1, 3 & 4 Renewable (Solar) 100% Spain Euro 3x50 MW A/Baa1/A- 2010 14/14/14 Solaben 1 & 6 Renewable (Solar) 100% Spain Euro 2x50 MW A/Baa1/A- 2013 17/17 Seville PV Renewable (Solar) 80% (6) Spain Euro 1 MW A/Baa1/A- 2006 15 Re Sole Renewable (Solar) 100% Italy Euro 2.1 MW BBB/Baa3/BBB- 2011 10 Agrisun Renewable (Solar) 100% Italy Euro 1.6 MW BBB/Baa3/BBB- 2010 9 Kaxu Renewable (Solar) 51% (3) South Africa Rand 100 MW BB-/Ba2/BB- (11) 2015 14 Elkhorn Valley Renewable (Wind) 49% Oregon (USA) USD 101 MW BBB/A3/-- 2007 7 Prairie Star Renewable (Wind) 49% Minnesota (USA) USD 101 MW --/A3/A- 2007 7 Twin Groves II Renewable (Wind) 49% Illinois (USA) USD 198 MW BBB-/Baa2/BBB 2008 5 Lone Star II Renewable (Wind) 49% Texas (USA) USD 196 MW Not rated 2008 2 Palmatir Renewable (Wind) 100% Uruguay USD 50 MW BBB/Baa2/BBB- (12) 2014 13 Cadonal Renewable (Wind) 100% Uruguay USD 50 MW BBB/Baa2/BBB- (12) 2014 13 Melowind Renewable (Wind) 100% Uruguay USD 50 MW BBB/Baa2/BBB- 2015 15 Coso Renewable (Geothermal) 100% California (USA) USD 135 MW Investment Grade (14) 1987-1989 19 Mini-Hydro Renewable (Hydraulic) 100% Peru USD 4 MW BBB+/A3/BBB+ 2012 12 ACT Efficient natural gas & heat 100% Mexico USD 300 MW BBB/ Ba3/BB- 2013 12 Monterrey Efficient natural gas &heat 30% Mexico USD 142 MW Not rated 2018 17 Calgary Efficient natural gas &heat 100% Canada CAD 55 MWt ~41% A+ or higher (15) 2010 20 ATN (13) Transmission line 100% Peru USD 379 miles BBB+/Baa1/BBB 2011 20 ATS Transmission line 100% Peru USD 569 miles BBB+/Baa1/BBB 2014 23 ATN 2 Transmission line 100% Peru USD 81 miles Not rated 2015 12 Quadra 1 & 2 Transmission line 100% Chile USD 49 miles/32 miles Not rated 2014 14/14 Palmucho Transmission line 100% Chile USD 6 miles BBB+/WR/A- 2007 16 Chile TL3 Transmission line 100% Chile USD 50 miles A/A1/A- 1993 Regulated Skikda Water 34.2% (4) Algeria USD 3.5 M ft3/day Not rated 2009 13 Honaine Water 25.5% (5) Algeria USD 7 M ft3/day Not rated 2012 16 Tenes Water 51% (7) Algeria USD 7 M ft3/day Not rated 2015 19 (1) Itochu Corporation, a Japanese trading company, holds 30% of the shares in each of Solaben 2 and Solaben 3. (2) JGC 13% of the shares in each of Solacor 1 and Solacor 2. (3) Kaxu is owned by the Company (51%), Industrial Development Corporation of South Africa ( 29% ) and Kaxu Community Trust ( ). (4) Algerian Energy Company, SPA owns 49% of Skikda and Sacyr Agua, S.L. owns the remaining . (5) Algerian Energy Company, SPA owns 49% of Honaine and Sacyr Agua, S.L. owns the remaining . (6) Instituto para la Diversificación y Ahorro de la Energía (“Idae”), a Spanish state-owned company, holds 20% of the shares in Seville PV. (7) Algerian Energy Company, SPA owns 49% of Tenes. (8) 65% of the shares in Chile PV 1 and Chile PV 2 are indirectly held by financial partners through the renewable energy platform of the Company in Chile . (9) Certain contracts denominated in U.S. dollars are payable in local currency. (10) Reflects the counterparty’s credit ratings issued by Standard & Poor’s Ratings Services, or S&P, Moody’s Investors Service Inc., or Moody’s, and Fitch Ratings Ltd, or Fitch. (11) Refers to the credit rating of the Republic of South Africa. The off-taker is Eskom, which is a state-owned utility company in South Africa. (12) Refers to the credit rating of Uruguay, as UTE (Administración Nacional de Usinas y Transmisoras Eléctricas) is unrated (13) Including ATN Expansion 1 & 2. (14) Refers to the credit rating of two Community Choice Aggregators: Silicon Valley Clean Energy and Monterrey Bar Community Power, both with A Rating from S&P and Southern California Public Power Authority. The third off-taker is not rated. (15) Refers to the credit rating of a diversified mix of 22 high credit quality clients (~41%A+ rating or higher, the rest is unrated). (16) As of September 30, 2021. (*) Commercial Operation Date

Financial information by segm_2

Financial information by segment (Tables)	9 Months Ended
	Sep. 30, 2021
Financial information by segment [Abstract]
Revenues and Adjusted EBITDA, assets and liabilities by operating segments and business sectors	a) The following tables show Revenue and Adjusted EBITDA by operating segments and business sectors for the nine-month periods ended , and : Revenue Adjusted EBITDA For the nine-month period ended September 30, For the nine-month period ended September 30, ($ in thousands) Geography 2021 2020 2021 2020 North America 308,661 267,688 233,810 233,201 South America 117,129 112,019 90,626 89,749 EMEA 514,628 389,027 293,601 286,622 Total 940,418 768,734 618,037 609,572 Revenue Adjusted EBITDA For the nine-month period ended September 30, For the nine-month period ended September 30, ($ in thousands) Business sector 2021 2020 2021 2020 Renewable energy 725,756 579,230 458,170 456,420 Efficient natural gas & Heat 93,524 80,118 73,527 72,412 Transmission lines 80,428 79,229 64,243 64,039 Water 40,710 30,157 22,097 16,701 Total 940,418 768,734 618,037 609,572 The reconciliation of segment Adjusted EBITDA with the profit attributable to the Company is as follows: For the nine-month period ended September 30, ($ in thousands) 2021 2020 Profit/(loss) attributable to the Company (18,166 ) 61,209 Profit/(loss) attributable to non-controlling interests 11,720 (3,042 ) Income tax 42,390 25,079 Share of (profit)/loss of associates carried under the equity method (4,245 ) 2,248 Financial expense, net 251,422 221,911 Depreciation, amortization, and impairment charges 334,916 302,166 Total segment Adjusted EBITDA 618,037 609,572
Assets and liabilities by geography	b) The assets and liabilities by operating segments (and business sector) as of September 30, 2021 and December 31, 2020 are as follows: Assets and liabilities by geography as of September 30, 2021: North America South America EMEA Balance as of September 30, 2021 ($ in thousands) Assets allocated Contracted concessional assets 3,396,242 1,219,002 3,558,673 8,173,917 Investments carried under the equity method 256,250 13 40,699 296,762 Current financial investments 135,664 27,846 44,291 207,801 Cash and cash equivalents (project companies) 242,677 79,908 362,014 684,599 Subtotal allocated 4,030,633 1,326,769 4,005,677 9,363,079 Unallocated assets Other non-current assets 253,170 Other current assets (including cash and cash equivalents at holding company level) 436,369 Subtotal unallocated 689,539 Total assets 10,052,618 North America South America EMEA Balance as of September 30, 2021 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,843,700 902,983 2,532,197 5,278,880 Grants and other liabilities 1,066,410 14,399 190,651 1,271,460 Subtotal allocated 2,910,110 917,382 2,722,848 6,550,340 Unallocated liabilities Long-term and short-term corporate debt 1,030,079 Other non-current liabilities 552,251 Other current liabilities 158,359 Subtotal unallocated 1,740,689 Total liabilities 8,291,029 Equity unallocated 1,761,589 Total liabilities and equity unallocated 3,502,278 Total liabilities and equity 10,052,618 Assets and liabilities by geography as of December 31, 2020: North America South America EMEA Balance as of December 31, 2020 ($ in thousands) Assets allocated Contracted concessional assets 3,073,785 1,211,952 3,869,681 8,155,418 Investments carried under the equity method 74,660 - 41,954 116,614 Current financial investments 129,264 27,836 42,984 200,084 Cash and cash equivalents (project companies) 206,344 70,861 255,530 532,735 Subtotal allocated 3,484,053 1,310,649 4,210,149 9,004,851 Unallocated assets Other non-current assets 242,044 Other current assets (including cash and cash equivalents at holding company level) 691,459 Subtotal unallocated 933,503 Total assets 9,938,354 North America South America EMEA Balance as of December 31, 2020 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,623,284 902,500 2,711,830 5,237,614 Grants and other liabilities 1,078,974 11,355 139,438 1,229,767 Subtotal allocated 2,702,258 913,855 2,851,268 6,467,381 Unallocated liabilities Long-term and short-term corporate debt 993,725 Other non-current liabilities 589,107 Other current liabilities 147,260 Subtotal unallocated 1,730,092 Total liabilities 8,197,473 Equity unallocated 1,740,881 Total liabilities and equity unallocated 3,470,973 Total liabilities and equity 9,938,354
Assets and liabilities by business sector	Assets and liabilities by business sector as of September 30, 2021: Renewable energy Efficient natural gas & Heat Transmission lines Water Balance as of September 30, 2021 ($ in thousands) Assets allocated Contracted concessional assets 6,662,219 526,877 814,825 169,996 8,173,917 Investments carried under the equity method 250,104 8,745 - 37,913 296,762 Current financial investments 4,531 135,375 27,705 40,190 207,801 Cash and cash equivalents (project companies) 563,034 51,804 52,975 16,787 684,599 Subtotal allocated 7,479,887 722,801 895,505 264,886 9,363,079 Unallocated assets Other non-current assets 253,170 Other current assets (including cash and cash equivalents at holding company level) 436,369 Subtotal unallocated 689,539 Total assets 10,052,618 Renewable energy Efficient natural gas & Heat Transmission lines Water Balance as of September 30, 2021 ($ in thousands) Liabilities allocated Long-term and short-term project debt 4,073,826 485,198 617,690 102,166 5,278,880 Grants and other liabilities 1,251,956 11,352 5,833 2,319 1,271,460 Subtotal allocated 5,325,782 496,550 623,523 104,485 6,550,340 Unallocated liabilities Long-term and short-term corporate debt 1,030,079 Other non-current liabilities 552,251 Other current liabilities 158,359 Subtotal unallocated 1,740,689 Total liabilities 8,291,029 Equity unallocated 1,761,589 Total liabilities and equity unallocated 3,502,278 Total liabilities and equity 10,052,618 Assets and liabilities by business sector as of December 31, 2020: Renewable energy Efficient natural & Heat Transmission lines Water Balance as of December 31, 2020 ($ in thousands) Assets allocated Contracted concessional assets 6,632,611 502,285 842,595 177,927 8,155,418 Investments carried under the equity method 61,866 15,514 30 39,204 116,614 Current financial investments 6,530 124,872 27,796 40,886 200,084 Cash and cash equivalents (project companies) 397,465 67,955 46,045 21,270 532,735 Subtotal allocated 7,098,472 710,626 916,466 279,287 9,004,851 Unallocated assets Other non-current assets 242,044 Other current assets (including cash and cash equivalents at holding company level) 691,459 Subtotal unallocated 933,503 Total assets 9,938,354 Renewable energy Efficient natural & Heat Transmission lines Water Balance as of December 31, 2020 ($ in thousands) Liabilities allocated Long-term and short-term project debt 3,992,512 504,293 625,203 115,606 5,237,614 Grants and other liabilities 1,221,176 108 6,040 2,443 1,229,767 Subtotal allocated 5,213,688 504,401 631,243 118,049 6,467,381 Unallocated liabilities Long-term and short-term corporate debt 993,725 Other non-current liabilities 589,107 Other current liabilities 147,260 Subtotal unallocated 1,730,092 Total liabilities 8,197,473 Equity unallocated 1,740,881 Total liabilities and equity unallocated 3,470,973 Total liabilities and equity 9,938,354
Depreciation, amortization and impairment charges recognized	c) The amount of depreciation, amortization and impairment charges recognized for the nine-month periods ended September 30, 2021 and 2020 are as follows: For the nine-month period ended September 30, Depreciation, amortization and impairment by geography 2021 2020 ($ in thousands) North America (119,196 ) (162,803 ) South America (43,388 ) (26,624 ) EMEA (172,332 ) (112,739 ) Total (334,916 ) (302,166 ) For the nine-month period ended September 30, Depreciation, amortization and impairment by business sectors 2021 2020 ($ in thousands) Renewable energy (334,513 ) (253,617 ) Efficient natural gas & Heat 22,956 (23,616 ) Transmission lines (24,194 ) (24,236 ) Water 836 (697 ) Total (334,916 ) (302,166 )

Business combinations (Tables)

Business combinations (Tables)	9 Months Ended
	Sep. 30, 2021
Business combinations [Abstract]
Fair value of assets and liabilities consolidated at the effective acquisition date	The fair value of assets and liabilities consolidated at the effective acquisition date is shown in the following table: Business combinations for the nine September 30 2021 ($ in thousands) Coso Other Total Contracted concessional assets 381,160 125,858 507,018 Deferred tax asset - 4,526 4,526 O ther non-current assets 11,024 2,062 13,086 Cash & cash equivalents 6,363 13,976 20,339 Other current assets 16,371 45,900 62,271 Non-current Project debt (248,544 ) (38,804 ) (287,348 ) Current Project debt (13,415 ) (24,167 ) (37,582 ) Deferred tax liabilities - (771 ) (771 ) Other current and non-current liabilities (22,959 ) (63,933 ) (86,892 ) Non-controlling interests - (8,287 ) (8,287 ) Total net assets acquired at fair value 130,000 56,360 186,360 Asset acquisition – purchase price paid (130,000 ) (53,312 ) (183,312 ) Fair value of previously held 15% stake in Rioglass - (3,048 ) (3,048 ) Net result of business combinations - - - The fair value of assets and liabilities consolidated at the effective acquisition date is shown in the following table: Business combinations for the year-ended December 31, 2020 ($ in thousands) Contracted concessional assets 172,321 Other non-current assets 355 Cash & cash equivalents 17,646 Other current assets 31,422 Non-current Project debt (149,585 ) Current Project debt (8,680 ) Other current and non-current liabilities (15,561 ) Non-controlling interests (25,308 ) Total net assets acquired at fair value 22,610 Asset acquisition - purchase price (22,610 ) Net result of business combinations -

Contracted concessional assets

Contracted concessional assets (Tables)	9 Months Ended
	Sep. 30, 2021
Contracted concessional assets [Abstract]
Movements of contracted concessional assets	The detail of contracted concessional assets included in the heading ‘Contracted concessional assets’ as of September 30, 2021 and December 31, 2020 is as follows: Financial assets under IFRIC 12 Financial assets under IFRS 16 Intangible assets under IFRIC 12 Intangible assets under IFRS 16 (Lessee) Other intangible assets under IAS 38 Property, plant and equipment under IAS 16 Balance as of September 30, 2021 ($ in thousands) Contracted concessional assets cost 891,757 2,895 9,292,599 78,781 21,467 837,960 11,125,459 Amortization and impairment (64,076 ) - (2,706,477 ) (12,602 ) (7,269 ) (161,118 ) (2,951,542 ) Total 827,681 2,895 6,586,122 66,179 14,198 676,842 8,173,917 Financial assets under IFRIC 12 Financial assets under IFRS 16 Intangible assets under IFRIC 12 Intangible assets under IFRS 16 (Lessee) Other intangible assets under IAS 38 Property, plant and equipment under IAS 16 Balance as of December 31, 2020 ($ in thousands) Contracted concessional assets cost 936,837 2,941 9,467,309 66,230 13,800 336,920 10,824,037 Amortization and impairment (87,689 ) - (2,442,520 ) (10,060 ) (6,111 ) (122,240 ) (2,668,619 ) Total 849,149 2,941 7,024,789 56,170 7,689 214,680 8,155,418

Investments carried under the_2

Investments carried under the equity method (Tables)	9 Months Ended
	Sep. 30, 2021
Investments carried under the equity method [Abstract]
Breakdown of investments held in associates	The table below shows the breakdown of the investments held in associates as of September 30, 2021 and December 31, 2020: Balance as of September 30, 2021 Balance as of December 31, 2020 ($ in thousands) 2 007 Vento II, LLC 199,280 - Evacuación Valdecaballeros, S.L. 996 976 Myah Bahr Honaine, S.P.A. 37,913 39,204 Pectonex, R.F. Proprietary Limited 1,517 1,587 Ca Ku A1, S.A.P.I. de CV (PTS) - 30 Windlectric Inc 48,025 59,116 Pemcorp SAPI de CV 8,745 15,514 Other renewable energy associates 286 186 Total 296,762 116,614

Financial investments (Tables)

Financial investments (Tables)	9 Months Ended
	Sep. 30, 2021
Financial investments [Abstract]
Non-current and Current financial investments	The detail of Non-current and Current financial investments as of September 30, 2021 and December 31, 2020 is as follows: Balance as of September 30, 2021 Balance as of December 31, 2020 ($ in thousands) Fair Value through OCI (Investment in Ten West link) 14,459 12,896 Fair Value through Profit and Loss (Investment in Rioglass) - 2,687 Derivative assets (Note 9) 5,038 1,099 Other receivable accounts at amortized cost 69,369 73,072 Total non-current financial investments 88,866 89,754 Contracted concessional financial assets 188,111 178,198 Derivative assets (Note 9) 1,780 460 Other receivable accounts at amortized cost 17,910 21,426 Total current financial investments 207,801 200,084

Derivative financial instrume_2

Derivative financial instruments (Tables)	9 Months Ended
	Sep. 30, 2021
Derivative financial instruments [Abstract]
Fair value amount of derivative financial instruments	The breakdowns of the fair value amount of the derivative financial instruments as of September 30, 2021 and December 31, 2020 are as follows: Balance as of September 30, 2021 Balance as of December 31, 2020 ($ in thousands) Assets Liabilities Assets Liabilities Interest rate cash flow hedge 4,101 237,664 898 302,302 Foreign exchange derivatives instruments 2,717 - 661 - Notes conversion option (Note 14) - 11,975 - 25,882 Total 6,818 249,639 1,559 328,184

Related parties (Tables)

Related parties (Tables)	9 Months Ended
	Sep. 30, 2021
Related parties [Abstract]
Related party receivables and payables	Details of balances with related parties as of September 30, 2021 and December 31, 2020 are as follows: Balance as of September 30, Balance as of December 31, ($ in thousands) 2021 2020 Credit receivables (current) 20,101 23,067 Credit receivables (non-current) 15,182 10,082 Total receivables from related parties 35,283 33,149 Credit payables (current) 6,379 18,477 Credit payables (non-current) 5,700 6,810 Total payables to related parties 12,079 25,287
Related party transactions	The transactions carried out by entities included in these Consolidated Condensed Interim Financial Statements with related parties, for the nine-month periods ended September 30, 2021 and 2020 have been as follows: For the nine-month period ended September 30, 2021 2020 ($ in thousands) Financial income 1,547 1,493 Financial expenses (89 ) (119 )

Trade and other receivables (Ta

Trade and other receivables (Tables)	9 Months Ended
	Sep. 30, 2021
Trade and other receivables [Abstract]
Trade and other receivables	Trade and other receivables as of September 30, 2021 and December 31, 2020, consist of the following: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Trade receivables 236,406 258,088 Tax receivables 56,554 50,663 Prepayments 22,616 12,074 Other accounts receivable 8,691 10,910 Total 324,267 331,735

Corporate debt (Tables)

Corporate debt (Tables)	9 Months Ended
	Sep. 30, 2021
Corporate debt [Abstract]
Corporate debt	The breakdown of corporate debt as of September 30, 2021 and December 31, 2020 is as follows: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Non-current 1,009,128 970,077 Current 20,951 23,648 Total Corporate Debt 1,030,079 993,725
Repayment schedule for corporate debt	The repayment schedule for the corporate debt as of September 30, 2021 is as follows: Remainder of 2021 Between January and September 2022 Between October and December 2022 2023 2024 2025 Subsequent years Total ($ in thousands) 2017 Credit Facility 20 - - - - - - 20 Revolving Credit Facility 12 - - 13,631 - - - 13,643 Commercial Paper 9,262 4,026 - - - - - 13,288 2020 Green Private Placement 329 - - - - - 333,022 333,351 Note Issuance Facility 2020 - - - - - - 158,551 158,551 Green Exchangeable Notes 967 - - - - 103,963 - 104,930 Bank loan 10 - - 1,930 1,930 1,894 - 5,764 Green Senior Notes 6,325 - - - - - 394,207 400,532 Total 16,925 4,026 - 15,561 1,930 105,857 885,780 1,030,079 The repayment schedule for the corporate debt as of December 31, 2020 was as follows 2021 2022 2023 2024 2025 Subsequent years Total ($ in thousands) 2017 Credit Facility 41 - - - - - 41 Notes Issuance Facility 2019 - - - - 343,999 - 343,999 Commercial Paper 21,224 - - - - - 21,224 2020 Green Private Placement 289 - - - - 351,026 351,315 Note Issuance Facility 2020 - - - - - 166,846 166,846 Green Exchangeable Notes 2,083 - - - 102,144 - 104,227 Bank loan 11 - 2,036 2,036 1,990 - 6,073 Total 23,648 - 2,036 2,036 448,133 517,872 993,725

Project debt (Tables)

Project debt (Tables)	9 Months Ended
	Sep. 30, 2021
Project debt [Abstract]
Project debt	The breakdown of project debt for both non-current and current liabilities as of September 30, 2021 and December 31, 2020 is as follows: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Non-current 4,568,387 4,925,268 Current 710,493 312,346 Total Project debt 5,278,880 5,237,614
Repayment schedule for project debt	The repayment schedule for project debt in accordance with the financing arrangements and assuming there will be no acceleration of the Kaxu debt, as of September 30, 2021, is as follows and is consistent with the projected cash flows of the related projects: Remainder of 2021 Interest payment Nominal repayment Between January and September 2022 Between October December 2022 2023 2024 2025 Subsequent years Total ($ in thousands) 59,366 163,975 166,131 163,122 359,313 373,083 504,196 3,489,692 5,278,880 The repayment schedule for project debt in accordance with the financing arrangements as of December 31, 2020, was as follows and was consistent with the projected cash flows of the related projects: 2021 2022 2023 2024 2025 Subsequent years Total ($ in thousands) Interest payment Nominal repayment 19,287 293,059 328,364 355,806 371,548 508,843 3,360,707 5,237,614

Grants and other liabilities (T

Grants and other liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Grants and other liabilities [Abstract]
Grants and other non-current liabilities	Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Grants 986,914 1,028,765 Other Liabilities 284,546 201,002 Grants and other non-current liabilities 1,271,460 1,229,767

Trade payables and other curr_2

Trade payables and other current liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Trade payables and other current liabilities [Abstract]
Trade payables and other current liabilities	Trade payables and other current liabilities as of September 30, 2021 and December 31, 2020 are as follows: Balance as of September 30, Balance as of December 31, 2021 2020 ($ in thousands) Trade accounts payable 75,547 54,219 Down payments from clients 5,460 416 Other accounts payable 37,593 37,922 Total 118,600 92,557

Financial expense, net (Tables)

Financial expense, net (Tables)	9 Months Ended
	Sep. 30, 2021
Financial expense, net [Abstract]
Financial income	The following table sets forth financial income and expenses for the nine-month periods ended September 30, 2021 and 2020: For the nine-month period ended September 30, Financial income 2021 2020 ($ in thousands) Interest income from loans and credits 1,549 6,124 Interest rate gains on derivatives: cash flow hedges 299 288 Total 1,848 6,413
Financial expenses	For the nine September 30 Financial expenses 2021 2020 Expenses due to interest: ($ in thousands) - Loans from credit entities (180,898 ) (186,769 ) - Other debts (51,167 ) (56,578 ) Interest rate losses on derivatives: cash flow hedges (44,935 ) (46,092 ) Total (277,000 ) (289,439 )
Other financial income and expenses	The following table sets out Other financial income and expenses for the nine-month periods ended September 30, 2021, and 2020: For the nine September 30 Other financial income / (expenses) 2021 2020 ($ in thousands) Other financial income 35,355 162,984 Other financial losses (13,671 ) (100,387 ) Total 21,684 62,597

Other operating income and ex_2

Other operating income and expenses (Tables)	9 Months Ended
	Sep. 30, 2021
Other operating income and expenses [Abstract]
Other operating income	The table below shows the detail of Other operating income and expenses for the nine-month periods ended September 30, 2021, and 2020: Other operating income For the nine-month period ended September 30, 2021 2020 ($ in thousands) Grants (Note 16) 44,449 44,256 Insurance proceeds and other 13,148 31,646 Total 57,597 75,902
Other operating expenses	Other operating expenses For the nine September 30 2021 2020 ($ in thousands) Raw materials and consumables used (64,756 ) (4,919 ) Leases and fees (6,451 ) (2,388 ) Operation and maintenance (117,750 ) (77,133 ) Independent professional services (27,297 ) (28,509 ) Supplies (25,270 ) (20,433 ) Insurance (33,943 ) (27,990 ) Levies and duties (25,948 ) (30,523 ) Other expenses (19,457 ) (5,740 ) Total (320,873 ) (197,635 )

Earnings per share (Tables)

Earnings per share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings per share [Abstract]
Earnings per share	Diluted earnings per share for the nine-month period ended September 30, 2021 have been calculated considering the potential issuance of 3,347,305 shares on the settlement of the Green Exchangeable Notes (Note 14) and the potential issuance of 510,169 shares to Algonquin under the agreement signed on August 3, 2021, according to which Algonquin has the option, on a quarterly basis, to subscribe such number of shares to maintain its percentage in Atlantica in relation to the use of the ATM program (Note 13). Diluted earnings per share for the nine-month period ended September 30, 2020 was calculated considering the potential issuance of 3,347,305 shares on the settlement of the Green Exchangeable Notes. Item For the nine September 30 2021 2020 ($ in thousands) Profit/(loss) attributable to Atlantica (18,166 ) 61,209 Average number of ordinary shares outstanding (thousands) - basic 110,749 101,602 Average number of ordinary shares outstanding (thousands) - diluted 114,156 102,499 Earnings per share for the period (U.S. dollar per share) - basic (0.16 ) 0.60 Earnings per share for the period (U.S. dollar per share) - diluted (0.16 ) 0.60

Nature of the business, Descrip

Nature of the business, Description (Details) - Algonquin [Member]	9 Months Ended
	Sep. 30, 2021
Nature of the business [Abstract]
Ownership interest	43.90%
Proportion of voting rights held by non-controlling interests	41.50%

Nature of the business, Assets

Nature of the business, Assets acquired (Details) $ in Thousands

Aug. 06, 2021USD ($)PlantMW

Jul. 22, 2021

Jun. 16, 2021MW

May 14, 2021USD ($)MW

Apr. 07, 2021USD ($)MW

Jan. 08, 2021

Jan. 07, 2021

Jan. 06, 2021USD ($)MW

Apr. 03, 2020USD ($)MW

Jan. 29, 2019

Sep. 30, 2021USD ($)

Dec. 31, 2020USD ($)MW

Jul. 15, 2021USD ($)

Jun. 15, 2021USD ($)

Aug. 17, 2020USD ($)

Aug. 16, 2020USD ($)

May 31, 2020

Nature of the business [Abstract]

Investment under the equity method

$ 296,762

$ 116,614

Solana [Member]

Nature of the business [Abstract]

Ownership interest

100.00%

Chile PV 1 [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 4,000

Percentage of interest acquired

35.00%

Gross capacity | MW

55

Chile PV 2 [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 5,000

Gross capacity | MW

40

Befesa Agua Tenes, S.L.U. [Member]

Nature of the business [Abstract]

Percentage of interest acquired

51.00%

Ownership interest

51.00%

Interest rate

12.00%

Liberty Interactive Corporation [Member] | Solana [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 285,000

Acquisition purchase price

$ 272,000

Calgary District Heating Center [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 22,500

Gross capacity | MW

55

La Sierpe [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 20,000

Gross capacity | MW

20

Rioglass [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 17,100

Percentage of interest acquired

42.50%

42.50%

42.50%

Ownership interest

100.00%

57.50%

15.00%

Rioglass [Member] | Investment Made in 2021 [Member]

Nature of the business [Abstract]

Percentage of interest acquired

85.00%

Coso [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 130,000

Gross capacity | MW

135

Period of PPA

18 years

Coso [Member] | Project Debt [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 40,000

Vento II [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 180,700

Percentage of interest acquired

49.00%

Gross capacity | MW

596

Ownership interest

51.00%

Period of PPA

5 years

Agrisun and Re Sole [Member]

Nature of the business [Abstract]

Investment under the equity method

$ 9,000

Gross capacity | MW

3.7

Number of solar plants acquired | Plant

2

Algonquin [Member] | La Sierpe [Member]

Nature of the business [Abstract]

Gross capacity | MW

30

Nature of the business, Main as

Nature of the business, Main assets owned (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Dec. 31, 2020
Nature of the business [Abstract]
Short-term project debt		$ 710,493	$ 312,346
ACT [Member]
Nature of the business [Abstract]
Type		Efficient natural gas & heat
Ownership		100.00%
Location		Mexico
Currency	[1]	USD
Capacity (gross)		300 MW
Counterparty credit ratings	[2]	BBB/ Ba3/BB-
COD	[3]	2013
Contract years left	[4]	12 years
Monterrey [Member]
Nature of the business [Abstract]
Type		Efficient natural gas &heat
Ownership		30.00%
Location		Mexico
Currency	[1]	USD
Capacity (gross)		142 MW
Counterparty credit ratings	[2]	Not rated
COD	[3]	2018
Contract years left	[4]	17 years
Calgary [Member]
Nature of the business [Abstract]
Type		Efficient natural gas &heat
Ownership		100.00%
Location		Canada
Currency	[1]	CAD
Capacity (gross)		55 MWt
Counterparty credit ratings	[2],[5]	~41% A+ or higher
COD	[3]	2010
Contract years left	[4]	20 years
ATN [Member]
Nature of the business [Abstract]
Type	[6]	Transmission line
Ownership	[6]	100.00%
Location	[6]	Peru
Currency	[1],[6]	USD
Capacity (gross)	[6]	379 miles
Counterparty credit ratings	[2],[6]	BBB+/Baa1/BBB
COD	[3],[6]	2011
Contract years left	[4],[6]	20 years
ATS [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Peru
Currency	[1]	USD
Capacity (gross)		569 miles
Counterparty credit ratings	[2]	BBB+/Baa1/BBB
COD	[3]	2014
Contract years left	[4]	23 years
ATN 2 [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Peru
Currency	[1]	USD
Capacity (gross)		81 miles
Counterparty credit ratings	[2]	Not rated
COD	[3]	2015
Contract years left	[4]	12 years
Quadra 1 & 2 [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		49 miles/32 miles
Counterparty credit ratings	[2]	Not rated
COD	[3]	2014
Quadra 1 [Member]
Nature of the business [Abstract]
Contract years left	[4]	14 years
Quadra 2 [Member]
Nature of the business [Abstract]
Contract years left	[4]	14 years
Palmucho [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		6 miles
Counterparty credit ratings	[2]	BBB+/WR/A-
COD	[3]	2007
Contract years left	[4]	16 years
Chile TL3 [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		50 miles
Counterparty credit ratings	[2]	A/A1/A-
COD	[3]	1993
Skikda [Member]
Nature of the business [Abstract]
Type		Water
Ownership	[7]	34.20%
Location		Algeria
Currency	[1]	USD
Capacity (gross)		3.5 M ft3/day
Counterparty credit ratings	[2]	Not rated
COD	[3]	2009
Contract years left	[4]	13 years
Skikda [Member] | Algerian Energy Company, SPA [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		49.00%
Skikda [Member] | Sacyr Agua S.L. [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		16.83%
Honaine [Member]
Nature of the business [Abstract]
Type		Water
Ownership	[8]	25.50%
Location		Algeria
Currency	[1]	USD
Capacity (gross)		7 M ft3/day
Counterparty credit ratings	[2]	Not rated
COD	[3]	2012
Contract years left	[4]	16 years
Honaine [Member] | Algerian Energy Company, SPA [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		49.00%
Honaine [Member] | Sacyr Agua S.L. [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		25.50%
Tenes [Member]
Nature of the business [Abstract]
Type		Water
Ownership	[9]	51.00%
Location		Algeria
Currency	[1]	USD
Capacity (gross)		7 M ft3/day
Counterparty credit ratings	[2]	Not rated
COD	[3]	2015
Contract years left	[4]	19 years
Tenes [Member] | Algerian Energy Company, SPA [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		49.00%
PS10 & PS20 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		31 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2007&2009
PS10 [Member]
Nature of the business [Abstract]
Contract years left	[4]	11 years
PS20 [Member]
Nature of the business [Abstract]
Contract years left	[4]	13 years
Solana [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Arizona (USA)
Currency	[1]	USD
Capacity (gross)		280 MW
Counterparty credit ratings	[2]	A-/A2/BBB+
COD	[3]	2013
Contract years left	[4]	22 years
Mojave [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		California (USA)
Currency	[1]	USD
Capacity (gross)		280 MW
Counterparty credit ratings	[2]	BB-/WR/BB
COD	[3]	2014
Contract years left	[4]	18 years
Chile PV I [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[10]	35.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		55 MW
Counterparty credit ratings	[2]	N/A
COD	[3]	2016
Percentage of non-controlling interests		65.00%
Chile PV 2 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[10]	35.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		40 MW
Counterparty credit ratings	[2]	N/A
COD	[3]	2017
Percentage of non-controlling interests		65.00%
Solaben 2 & 3 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[11]	70.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2012
Solaben 2 & 3 [Member] | Itochu Corporation [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		30.00%
Solaben 2 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Solaben 3 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Solacor 1 & 2 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[12]	87.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2012
Solacor 1 & 2 [Member] | JGC [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		13.00%
Solacor 1 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Solacor 2 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Helioenergy 1 & 2 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2011
Helioenergy 1 [Member]
Nature of the business [Abstract]
Contract years left	[4]	15 years
Helioenergy 2 [Member]
Nature of the business [Abstract]
Contract years left	[4]	15 years
Helios 1 & 2 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2012
Helios 1 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Helios 2 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Solnova 1, 3 & 4 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		3x50 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2010
Solnova 1 [Member]
Nature of the business [Abstract]
Contract years left	[4]	14 years
Solnova 3 [Member]
Nature of the business [Abstract]
Contract years left	[4]	14 years
Solnova 4 [Member]
Nature of the business [Abstract]
Contract years left	[4]	14 years
Solaben 1 & 6 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2013
Solaben 1 [Member]
Nature of the business [Abstract]
Contract years left	[4]	17 years
Solaben 6 [Member]
Nature of the business [Abstract]
Contract years left	[4]	17 years
Seville PV [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[13]	80.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		1 MW
Counterparty credit ratings	[2]	A/Baa1/A-
COD	[3]	2006
Contract years left	[4]	15 years
Seville PV [Member] | Idae [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		20.00%
Re Sole [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Italy
Currency	[1]	Euro
Capacity (gross)		2.1 MW
Counterparty credit ratings	[2]	BBB/Baa3/BBB-
COD	[3]	2011
Contract years left	[4]	10 years
Agrisun [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Italy
Currency	[1]	Euro
Capacity (gross)		1.6 MW
Counterparty credit ratings	[2]	BBB/Baa3/BBB-
COD	[3]	2010
Contract years left	[4]	9 years
Kaxu [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[14]	51.00%
Location		South Africa
Currency	[1]	Rand
Capacity (gross)		100 MW
Counterparty credit ratings	[2],[15]	BB-/Ba2/BB-
COD	[3]	2015
Contract years left	[4]	14 years
Short-term project debt		$ 349,000
Kaxu [Member] | IDC [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		29.00%
Kaxu [Member] | Kaxu Community Trust [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		20.00%
Elkhorn Valley [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		49.00%
Location		Oregon (USA)
Currency	[1]	USD
Capacity (gross)		101 MW
Counterparty credit ratings	[2]	BBB/A3/--
COD	[3]	2007
Contract years left	[4]	7 years
Prairie Star [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		49.00%
Location		Minnesota (USA)
Currency	[1]	USD
Capacity (gross)		101 MW
Counterparty credit ratings	[2]	--/A3/A-
COD	[3]	2007
Contract years left	[4]	7 years
Twin Groves II [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership	[13]	49.00%
Location		Illinois (USA)
Currency	[1]	USD
Capacity (gross)		198 MW
Counterparty credit ratings	[2]	BBB-/Baa2/BBB
COD	[3]	2008
Contract years left	[4]	5 years
Lone Star II [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership	[14]	49.00%
Location		Texas (USA)
Currency	[1]	USD
Capacity (gross)		196 MW
Counterparty credit ratings	[2],[15]	Not rated
COD	[3]	2008
Contract years left	[4]	2 years
Palmatir [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		100.00%
Location		Uruguay
Currency	[1]	USD
Capacity (gross)		50 MW
Counterparty credit ratings	[2],[16]	BBB/Baa2/BBB-
COD	[3]	2014
Contract years left	[4]	13 years
Cadonal [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		100.00%
Location		Uruguay
Currency	[1]	USD
Capacity (gross)		50 MW
Counterparty credit ratings	[2],[16]	BBB/Baa2/BBB-
COD	[3]	2014
Contract years left	[4]	13 years
Melowind [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		100.00%
Location		Uruguay
Currency	[1]	USD
Capacity (gross)		50 MW
Counterparty credit ratings	[2]	BBB/Baa2/BBB-
COD	[3]	2015
Contract years left	[4]	15 years
Coso [Member]
Nature of the business [Abstract]
Type		Renewable (Geothermal)
Ownership		100.00%
Location		California (USA)
Currency	[1]	USD
Capacity (gross)		135 MW
Counterparty credit ratings	[2],[17]	Investment Grade
COD	[3]	1987-1989
Contract years left	[4]	19 years
Mini-Hydro [Member]
Nature of the business [Abstract]
Type		Renewable (Hydraulic)
Ownership		100.00%
Location		Peru
Currency	[1]	USD
Capacity (gross)		4 MW
Counterparty credit ratings	[2]	BBB+/A3/BBB+
COD	[3]	2012
Contract years left	[4]	12 years
[1]	Certain contracts denominated in U.S. dollars are payable in local currency.
[2]	Reflects the counterparty’s credit ratings issued by Standard & Poor’s Ratings Services, or S&P, Moody’s Investors Service Inc., or Moody’s, and Fitch Ratings Ltd, or Fitch.
[3]	Commercial Operation Date
[4]	As of September 30, 2021.
[5]	Refers to the credit rating of a diversified mix of 22 high credit quality clients (~41%A+ rating or higher, the rest is unrated).
[6]	Including ATN Expansion 1 & 2.
[7]	Algerian Energy Company, SPA owns 49% of Skikda and Sacyr Agua, S.L. owns the remaining .
[8]	Algerian Energy Company, SPA owns 49% of Honaine and Sacyr Agua, S.L. owns the remaining .
[9]	Algerian Energy Company, SPA owns 49% of Tenes.
[10]	65% of the shares in Chile PV 1 and Chile PV 2 are indirectly held by financial partners through the renewable energy platform of the Company in Chile.
[11]	Itochu Corporation, a Japanese trading company, holds 30% of the shares in each of Solaben 2 and Solaben 3.
[12]	JGC 13% of the shares in each of Solacor 1 and Solacor 2.
[13]	Instituto para la Diversificación y Ahorro de la Energía (“Idae”), a Spanish state-owned company, holds 20% of the shares in Seville PV.
[14]	Kaxu is owned by the Company (51%), Industrial Development Corporation of South Africa ( 29% ) and Kaxu Community Trust ( ).
[15]	Refers to the credit rating of the Republic of South Africa. The off-taker is Eskom, which is a state-owned utility company in South Africa.
[16]	Refers to the credit rating of Uruguay, as UTE (Administración Nacional de Usinas y Transmisoras Eléctricas) is unrated
[17]	Refers to the credit rating of  two Community Choice Aggregators: Silicon Valley Clean Energy and Monterrey Bar Community Power, both with A Rating from S&P and Southern California Public Power Authority. The third off-taker is not rated.

Financial information by segm_3

Financial information by segment, Revenues and Adjusted EBITDA (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)Customer	Sep. 30, 2020USD ($)Customer
Financial information by segment [Abstract]
Number of customers representing more than 10% of total revenues | Customer	2	4
Revenue	$ 940,418	$ 768,734
Adjusted EBITDA	618,037	$ 609,572
Renewable Energy [Member]
Financial information by segment [Abstract]
Number of customers representing more than 10% of total revenues | Customer		3
Revenue	725,756	$ 579,230
Adjusted EBITDA	458,170	$ 456,420
Efficient Natural Gas & Heat [Member]
Financial information by segment [Abstract]
Number of customers representing more than 10% of total revenues | Customer		1
Revenue	93,524	$ 80,118
Adjusted EBITDA	73,527	72,412
Transmission Lines [Member]
Financial information by segment [Abstract]
Revenue	80,428	79,229
Adjusted EBITDA	64,243	64,039
Water [Member]
Financial information by segment [Abstract]
Revenue	40,710	30,157
Adjusted EBITDA	22,097	16,701
North America [Member]
Financial information by segment [Abstract]
Revenue	308,661	267,688
Adjusted EBITDA	233,810	233,201
South America [Member]
Financial information by segment [Abstract]
Revenue	117,129	112,019
Adjusted EBITDA	90,626	89,749
EMEA [Member]
Financial information by segment [Abstract]
Revenue	514,628	389,027
Adjusted EBITDA	$ 293,601	$ 286,622

Financial information by segm_4

Financial information by segment, Reconciliation of segment Adjusted EBITDA (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Financial information by segment [Abstract]
Profit/(loss) attributable to the Company	$ 18,166	$ (61,209)
Profit/(loss) attributable to non-controlling interests	11,720	(3,042)
Income tax	42,390	25,079
Share of (profit)/loss of associates carried under the equity method	(4,245)	2,248
Financial expense, net	251,422	221,911
Depreciation, amortization, and impairment charges	334,916	302,166
Total segment Adjusted EBITDA	(618,037)	(609,572)
Reconciling Item [Member]
Financial information by segment [Abstract]
Profit/(loss) attributable to the Company	(18,166)	61,209
Profit/(loss) attributable to non-controlling interests	11,720	(3,042)
Income tax	42,390	25,079
Share of (profit)/loss of associates carried under the equity method	(4,245)	2,248
Financial expense, net	251,422	221,911
Depreciation, amortization, and impairment charges	334,916	302,166
Total segment Adjusted EBITDA	$ 618,037	$ 609,572

Financial information by segm_5

Financial information by segment, Assets and liabilities by geography (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Assets allocated [Abstract]
Contracted concessional assets	$ 8,173,917	$ 8,155,418
Investments carried under the equity method	296,762	116,614
Current financial investments	207,801	200,084
Cash and cash equivalents (project companies)	763,545	868,501	$ 788,895	$ 562,795
Total assets	10,052,618	9,938,354
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,278,880	5,237,614
Grants and other liabilities	1,271,460	1,229,767
Long-term and short-term corporate debt	1,030,079	993,725
Total liabilities	8,291,029	8,197,473
Equity	1,761,589	1,740,881	$ 1,642,047	$ 1,714,856
Total liabilities and equity	10,052,618	9,938,354
North America [Member]
Assets allocated [Abstract]
Contracted concessional assets	3,396,242	3,073,785
Investments carried under the equity method	256,250	74,660
Current financial investments	135,664	129,264
Cash and cash equivalents (project companies)	242,677	206,344
Total assets	4,030,633	3,484,053
Liabilities allocated [Abstract]
Long-term and short-term project debt	1,843,700	1,623,284
Grants and other liabilities	1,066,410	1,078,974
Total liabilities	2,910,110	2,702,258
South America [Member]
Assets allocated [Abstract]
Contracted concessional assets	1,219,002	1,211,952
Investments carried under the equity method	13	0
Current financial investments	27,846	27,836
Cash and cash equivalents (project companies)	79,908	70,861
Total assets	1,326,769	1,310,649
Liabilities allocated [Abstract]
Long-term and short-term project debt	902,983	902,500
Grants and other liabilities	14,399	11,355
Total liabilities	917,382	913,855
EMEA [Member]
Assets allocated [Abstract]
Contracted concessional assets	3,558,673	3,869,681
Investments carried under the equity method	40,699	41,954
Current financial investments	44,291	42,984
Cash and cash equivalents (project companies)	362,014	255,530
Total assets	4,005,677	4,210,149
Liabilities allocated [Abstract]
Long-term and short-term project debt	2,532,197	2,711,830
Grants and other liabilities	190,651	139,438
Total liabilities	2,722,848	2,851,268
Allocated [Member]
Assets allocated [Abstract]
Contracted concessional assets	8,173,917	8,155,418
Investments carried under the equity method	296,762	116,614
Current financial investments	207,801	200,084
Cash and cash equivalents (project companies)	684,599	532,735
Total assets	9,363,079	9,004,851
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,278,880	5,237,614
Grants and other liabilities	1,271,460	1,229,767
Total liabilities	6,550,340	6,467,381
Unallocated [Member]
Assets allocated [Abstract]
Other non-current assets	253,170	242,044
Other current assets (including cash and cash equivalents at holding company level)	436,369	691,459
Total assets	689,539	933,503
Liabilities allocated [Abstract]
Long-term and short-term corporate debt	1,030,079	993,725
Other non-current liabilities	552,251	589,107
Other current liabilities	158,359	147,260
Total liabilities	1,740,689	1,730,092
Equity	1,761,589	1,740,881
Total liabilities and equity	$ 3,502,278	$ 3,470,973

Financial information by segm_6

Financial information by segment, Assets and liabilities by business sector (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Assets allocated [Abstract]
Contracted concessional assets	$ 8,173,917	$ 8,155,418
Investments carried under the equity method	296,762	116,614
Current financial investments	207,801	200,084
Cash and cash equivalents (project companies)	763,545	868,501	$ 788,895	$ 562,795
Total assets	10,052,618	9,938,354
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,278,880	5,237,614
Grants and other liabilities	1,271,460	1,229,767
Long-term and short-term corporate debt	1,030,079	993,725
Total liabilities	8,291,029	8,197,473
Equity	1,761,589	1,740,881	$ 1,642,047	$ 1,714,856
Total liabilities and equity	10,052,618	9,938,354
Renewable Energy [Member]
Assets allocated [Abstract]
Contracted concessional assets	6,662,219	6,632,611
Investments carried under the equity method	250,104	61,866
Current financial investments	4,531	6,530
Cash and cash equivalents (project companies)	563,034	397,465
Total assets	7,479,887	7,098,472
Liabilities allocated [Abstract]
Long-term and short-term project debt	4,073,826	3,992,512
Grants and other liabilities	1,251,956	1,221,176
Total liabilities	5,325,782	5,213,688
Efficient Natural Gas & Heat [Member]
Assets allocated [Abstract]
Contracted concessional assets	526,877	502,285
Investments carried under the equity method	8,745	15,514
Current financial investments	135,375	124,872
Cash and cash equivalents (project companies)	51,804	67,955
Total assets	722,801	710,626
Liabilities allocated [Abstract]
Long-term and short-term project debt	485,198	504,293
Grants and other liabilities	11,352	108
Total liabilities	496,550	504,401
Transmission Lines [Member]
Assets allocated [Abstract]
Contracted concessional assets	814,825	842,595
Investments carried under the equity method	0	30
Current financial investments	27,705	27,796
Cash and cash equivalents (project companies)	52,975	46,045
Total assets	895,505	916,466
Liabilities allocated [Abstract]
Long-term and short-term project debt	617,690	625,203
Grants and other liabilities	5,833	6,040
Total liabilities	623,523	631,243
Water [Member]
Assets allocated [Abstract]
Contracted concessional assets	169,996	177,927
Investments carried under the equity method	37,913	39,204
Current financial investments	40,190	40,886
Cash and cash equivalents (project companies)	16,787	21,270
Total assets	264,886	279,287
Liabilities allocated [Abstract]
Long-term and short-term project debt	102,166	115,606
Grants and other liabilities	2,319	2,443
Total liabilities	104,485	118,049
Allocated [Member]
Assets allocated [Abstract]
Contracted concessional assets	8,173,917	8,155,418
Investments carried under the equity method	296,762	116,614
Current financial investments	207,801	200,084
Cash and cash equivalents (project companies)	684,599	532,735
Total assets	9,363,079	9,004,851
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,278,880	5,237,614
Grants and other liabilities	1,271,460	1,229,767
Total liabilities	6,550,340	6,467,381
Unallocated [Member]
Assets allocated [Abstract]
Other non-current assets	253,170	242,044
Other current assets (including cash and cash equivalents at holding company level)	436,369	691,459
Total assets	689,539	933,503
Liabilities allocated [Abstract]
Long-term and short-term corporate debt	1,030,079	993,725
Other non-current liabilities	552,251	589,107
Other current liabilities	158,359	147,260
Total liabilities	1,740,689	1,730,092
Equity	1,761,589	1,740,881
Total liabilities and equity	$ 3,502,278	$ 3,470,973

Financial information by segm_7

Financial information by segment, Depreciation, amortization and impairment charges recognized (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	$ (334,916)	$ (302,166)
North America [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(119,196)	(162,803)
South America [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(43,388)	(26,624)
EMEA [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(172,332)	(112,739)
Renewable Energy [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(334,513)	(253,617)
Efficient Natural Gas & Heat [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	22,956	(23,616)
Transmission Lines [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(24,194)	(24,236)
Water [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	$ 836	$ (697)

Business combinations, 2021 (De

Business combinations, 2021 (Details) $ in Thousands	Aug. 06, 2021USD ($)PlantMW	Jul. 22, 2021USD ($)	May 14, 2021USD ($)MW	Apr. 07, 2021USD ($)MW	Jan. 08, 2021USD ($)	Jan. 07, 2021	Jan. 06, 2021USD ($)MW	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value, Assets and Liabilities Acquisition [Abstract]
Contracted concessional assets								$ 507,018
Deferred tax assets								4,526
Other non-current assets								13,086
Cash & cash equivalents								20,339
Other current assets								62,271
Non-current project debt								(287,348)
Current project debt								(37,582)
Deferred tax liabilities								(771)
Other current and non-current liabilities								(86,892)
Non-controlling interests								(8,287)
Total net assets acquired at fair value								186,360
Asset acquisition - purchase price paid								(183,312)
Fair value of previously held 15% stake in Rioglass								(3,048)
Net result of business combinations								0
Revenue contributed by the acquisitions								126,000
Amount of loss after tax								$ (4,700)
Additional revenue amount									$ 14,800
Additional amount of profit after tax									1,800
Chile PV2 [Member] | Renewable Energy [Member]
Business combinations [Abstract]
Gross capacity | MW							40
Payment to acquire equity investment							$ 5,000
Percentage of non-controlling interests							65.00%
Asset Acquisition [Member]
Fair Value, Assets and Liabilities Acquisition [Abstract]
Contracted concessional assets									172,321
Other non-current assets									355
Cash & cash equivalents									17,646
Other current assets									31,422
Non-current project debt									(149,585)
Current project debt									(8,680)
Other current and non-current liabilities									(15,561)
Non-controlling interests									(25,308)
Total net assets acquired at fair value									22,610
Asset acquisition - purchase price paid									(22,610)
Net result of business combinations									0
Revenue contributed by the acquisitions									22,500
Amount of loss after tax									6,300
Additional revenue amount									14,700
Additional amount of profit after tax									$ 3,700
Rioglass [Member]
Business combinations [Abstract]
Percentage of interest acquired		42.50%			42.50%			42.50%
Ownership interest		100.00%			57.50%	15.00%
Acquisition, purchase price paid		$ 4,800			$ 8,400
Additional consideration paid					$ 3,600
Coso [Member]
Business combinations [Abstract]
Gross capacity | MW				135
Payment to acquire equity investment				$ 130,000
Fair Value, Assets and Liabilities Acquisition [Abstract]
Contracted concessional assets								$ 381,160
Deferred tax assets								0
Other non-current assets								11,024
Cash & cash equivalents								6,363
Other current assets								16,371
Non-current project debt								(248,544)
Current project debt								(13,415)
Deferred tax liabilities								0
Other current and non-current liabilities								(22,959)
Non-controlling interests								0
Total net assets acquired at fair value								130,000
Asset acquisition - purchase price paid								(130,000)
Fair value of previously held 15% stake in Rioglass								0
Net result of business combinations								0
Calgary District Heating Center [Member]
Business combinations [Abstract]
Gross capacity | MW			55
Payment to acquire equity investment			$ 22,500
Agrisun and Re Sole [Member]
Business combinations [Abstract]
Number of solar plants acquired | Plant	2
Gross capacity | MW	3.7
Payment to acquire equity investment	$ 9,000
Other [Member]
Fair Value, Assets and Liabilities Acquisition [Abstract]
Contracted concessional assets								125,858
Deferred tax assets								4,526
Other non-current assets								2,062
Cash & cash equivalents								13,976
Other current assets								45,900
Non-current project debt								(38,804)
Current project debt								(24,167)
Deferred tax liabilities								(771)
Other current and non-current liabilities								(63,933)
Non-controlling interests								(8,287)
Total net assets acquired at fair value								56,360
Asset acquisition - purchase price paid								(53,312)
Fair value of previously held 15% stake in Rioglass								(3,048)
Net result of business combinations								$ 0

Business combinations, 2020 (De

Business combinations, 2020 (Details) $ in Thousands	May 31, 2020USD ($)	Apr. 03, 2020USD ($)MW	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value, Assets and Liabilities Acquisition [Abstract]
Contracted concessional assets			$ 507,018
Other non-current assets			13,086
Cash & cash equivalents			20,339
Other current assets			62,271
Non-current project debt			(287,348)
Current project debt			(37,582)
Other current and non-current liabilities			(86,892)
Non-controlling interests			(8,287)
Total net assets acquired at fair value			186,360
Asset acquisition - purchase price paid			(183,312)
Net result of business combinations			0
Revenue contributed by the acquisitions			126,000
Amount of profit after tax			$ (4,700)
Additional revenue amount				$ 14,800
Additional amount of profit after tax				1,800
Chile PV 1 [Member] | Renewable Energy [Member]
Business combinations [Abstract]
Gross capacity | MW		55
Payment to acquire equity investment		$ 4,000
Percentage of non-controlling interests		65.00%
Asset Acquisition [Member]
Fair Value, Assets and Liabilities Acquisition [Abstract]
Contracted concessional assets				172,321
Other non-current assets				355
Cash & cash equivalents				17,646
Other current assets				31,422
Non-current project debt				(149,585)
Current project debt				(8,680)
Other current and non-current liabilities				(15,561)
Non-controlling interests				(25,308)
Total net assets acquired at fair value				22,610
Asset acquisition - purchase price paid				(22,610)
Net result of business combinations				0
Revenue contributed by the acquisitions				22,500
Amount of profit after tax				6,300
Additional revenue amount				14,700
Additional amount of profit after tax				$ 3,700
Befesa Agua Tenes, S.L.U. [Member]
Business combinations [Abstract]
Percentage of non-controlling interests	49.00%
Percentage of interest acquired	51.00%
Total investment	$ 19,000

Contracted concessional asset_2

Contracted concessional assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Contracted Concessional Assets [Abstract]
Contracted concessional assets	$ 8,173,917		$ 8,155,418
Amount of increase in the contracted concessional assets cost	507,018
Impairment loss on contracted concessional financial assets	43,079
Impairment provision based on expected credit losses on contracted concessional financial assets	(24,000)	$ 29,000
Solana [Member]
Contracted Concessional Assets [Abstract]
Recoverable amount of contracted concessional financial assets value in use	943,255
Additional impairment loss with increase in discount rate	$ 69,000
Assumed percentage decrease in generation	5.00%
Additional impairment loss with increase in discount rate	$ 41,000
Assumed basis point increase in discount rate	0.50%
Solana [Member] | Bottom of range [member]
Contracted Concessional Assets [Abstract]
Discount rate	4.50%
Solana [Member] | Top of range [member]
Contracted Concessional Assets [Abstract]
Discount rate	5.00%
Financial assets under IFRIC 12 [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	$ 827,681		849,149
Financial assets under IFRS 16 lessor [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	2,895		2,941
Intangible assets under IFRIC 12 [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	6,586,122		7,024,789
Intangible assets under IFRS 16 lessee [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	66,179		56,170
Other intangible assets [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	14,198		7,689
Property, plant and equipment [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	676,842		214,680
Cost [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	11,125,459		10,824,037
Cost [Member] | Financial assets under IFRIC 12 [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	891,757		936,837
Cost [Member] | Financial assets under IFRS 16 lessor [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	2,895		2,941
Cost [Member] | Intangible assets under IFRIC 12 [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	9,292,599		9,467,309
Cost [Member] | Intangible assets under IFRS 16 lessee [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	78,781		66,230
Cost [Member] | Other intangible assets [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	21,467		13,800
Cost [Member] | Property, plant and equipment [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	837,960		336,920
Amortization and Impairment [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	(2,951,542)		(2,668,619)
Amortization and Impairment [Member] | Financial assets under IFRIC 12 [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	(64,076)		(87,689)
Amortization and Impairment [Member] | Financial assets under IFRS 16 lessor [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	0		0
Amortization and Impairment [Member] | Intangible assets under IFRIC 12 [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	(2,706,477)		(2,442,520)
Amortization and Impairment [Member] | Intangible assets under IFRS 16 lessee [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	(12,602)		(10,060)
Amortization and Impairment [Member] | Other intangible assets [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	(7,269)		(6,111)
Amortization and Impairment [Member] | Property, plant and equipment [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	$ (161,118)		$ (122,240)

Investments carried under the_3

Investments carried under the equity method (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Jun. 30, 2021MW	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Investments in associates [Abstract]
Investment under the equity method		$ 296,762	$ 116,614
Geida Tlemcen, S.L. [Member]
Investments in associates [Abstract]
Ownership interest		50.00%
Windlectric Inc. [Member]
Investments in associates [Abstract]
Ownership interest		100.00%
Arroyo Netherlands II B.V [Member]
Investments in associates [Abstract]
Ownership interest		30.00%
Ownership interest		100.00%
AYES Canada [Member] | Amherst Island [Member]
Investments in associates [Abstract]
Dividend distribution		$ 11,300
2007 Vento II, LLC [Member]
Investments in associates [Abstract]
Investment under the equity method		199,280	0
Ownership interest	49.00%
Gross capacity | MW	596
Evacuacion Valdecaballeros, S.L. [Member]
Investments in associates [Abstract]
Investment under the equity method		996	976
Myah Bahr Honaine, S.P.A. [Member]
Investments in associates [Abstract]
Investment under the equity method		$ 37,913	39,204
Myah Bahr Honaine, S.P.A. [Member] | Geida Tlemcen, S.L. [Member]
Investments in associates [Abstract]
Ownership interest		51.00%
Pectonex, R.F. Proprietary Limited [Member]
Investments in associates [Abstract]
Investment under the equity method		$ 1,517	1,587
Ca Ku A1, S.A.P.I. de CV (PTS) [Member]
Investments in associates [Abstract]
Investment under the equity method		0	30
Windlectric Inc. [Member]
Investments in associates [Abstract]
Investment under the equity method		48,025	59,116
Pemcorp SAPI de CV [Member]
Investments in associates [Abstract]
Investment under the equity method		8,745	15,514
Other renewable energy associates [Member]
Investments in associates [Abstract]
Investment under the equity method		$ 286	$ 186

Financial investments, Non-curr

Financial investments, Non-current and current financial investments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial investments [Abstract]
Fair Value through OCI (Investment in Ten West link)	$ 14,459	$ 12,896
Fair Value through Profit and Loss (Investment in Rioglass)	0	2,687
Derivative assets (Note 9)	5,038	1,099
Other receivable accounts at amortized cost	69,369	73,072
Total non-current financial investments	88,866	89,754
Contracted concessional financial assets	188,111	178,198
Derivative assets (Note 9)	1,780	460
Other receivable accounts at amortized cost	17,910	21,426
Total current financial investments	$ 207,801	$ 200,084

Financial investments, Restruct

Financial investments, Restructuring agreement of Abengoa (Details) - mi	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Ten West Link [Member]
Restructuring Agreement [Abstract]
Percentage of interest acquired	12.50%
Length of transmission lines	114
Rioglass [Member]
Restructuring Agreement [Abstract]
Percentage of interest acquired		15.12%

Derivative financial instrume_3

Derivative financial instruments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Breakdown of fair value amount of derivative financial instruments [Abstract]
Loss on cash flow hedges	$ 44,643	$ 43,792
Cash Flow Hedge [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Assets	6,818		$ 1,559
Liabilities	$ 249,639		328,184
Interest Rate Derivatives [Member] | Euros [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Percent of notional amount of debt hedged in next 12 months	100.00%
Percentage of notional amount of debt hedged in year two	75.00%
Interest Rate Derivatives [Member] | Cash Flow Hedge [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Assets	$ 4,101		898
Liabilities	237,664		302,302
Loss on cash flow hedges	(44,600)	$ (43,800)
After-tax result accumulated in equity	147,900		96,600
Foreign Exchange Derivative Instruments [Member] | Cash Flow Hedge [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Assets	2,717		661
Liabilities	0		0
Notes Conversion Option [Member] | Cash Flow Hedge [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Assets	0		0
Liabilities	$ 11,975		$ 25,882

Related parties (Details)

Related parties (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Details of Balances [Abstract]
Credit receivables (current)	$ 20,101		$ 23,067
Credit receivables (non-current)	15,182		10,082
Total receivables from related parties	35,283		33,149
Credit payables (current)	6,379		18,477
Credit payables (non-current)	5,700		6,810
Total payables to related parties	12,079		25,287
Transactions with Related Party [Abstract]
Financial income	1,848	$ 6,413
Financial expenses	(277,000)	(289,439)
Kaxu, Solaben 2&3 and Solacor 1&2 [Member]
Details of Balances [Abstract]
Credit payables (non-current)	9,600		21,100
Arroyo Netherlands II B.V [Member]
Details of Balances [Abstract]
Credit receivables (current)	16,900		15,500
Algonquin [Member]
Details of Balances [Abstract]
Credit payables (current)	2,400		$ 4,200
Subsidiaries [Member]
Transactions with Related Party [Abstract]
Financial income	1,547	1,493
Financial expenses	$ (89)	$ (119)

Trade and other receivables (De

Trade and other receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Trade and other receivables [Abstract]
Trade receivables	$ 236,406	$ 258,088
Tax receivables	56,554	50,663
Prepayments	22,616	12,074
Other accounts receivable	8,691	10,910
Trade and other receivables	324,267	$ 331,735
Increase in trade receivables	$ 28,000

Equity (Details)

Equity (Details) $ / shares in Units, $ in Thousands	Sep. 15, 2021USD ($)$ / shares	Jul. 15, 2021USD ($)$ / shares	Mar. 22, 2021USD ($)$ / shares	Jan. 07, 2021USD ($)shares	Dec. 11, 2020USD ($)$ / sharesshares	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2021USD ($)Vote$ / sharesshares	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Equity [Abstract]
Share capital						$ 11,148	$ 11,148		$ 10,667
Ordinary shares subscribed and disbursed (in shares) | shares						111,477,263	111,477,263
Nominal value per share (in dollars per share) | $ / shares						$ 0.10	$ 0.10
Voting right per share | Vote							1
Liability reclassified to equity							$ 9,000
Reduction of share premium							$ 0
Treasury shares held (in shares) | shares						0	0
Number of treasury share transactions in the period (in shares) | shares							0
Fourth Quarter [Member]
Equity [Abstract]
Dividend declaration date							Feb. 26, 2021
Dividend paid date							Mar. 22, 2021
Dividends paid (in dollars per share) | $ / shares			$ 0.42
Dividends paid			$ 46,500
First Quarter [Member]
Equity [Abstract]
Dividend declaration date							May 4, 2021
Dividend paid date							Jun. 15, 2021
Dividends paid (in dollars per share) | $ / shares		$ 0.43
Dividends paid		$ 47,700
Second Quarter [Member]
Equity [Abstract]
Dividend declaration date							Jul. 30, 2021
Dividend paid date							Sep. 15, 2021
Dividends paid (in dollars per share) | $ / shares	$ 0.43
Dividends paid	$ 47,800
Long-term Incentive Plans [Member]
Equity [Abstract]
Shares issued (in shares) | shares						141,482	141,482
Algonquin [Member]
Equity [Abstract]
Ownership interest							43.90%
Dividends paid to non-controlling interests							$ 11,100	$ 10,700
Public Offering [Member]
Equity [Abstract]
Nominal value per share (in dollars per share) | $ / shares					$ 33
Shares issued (in shares) | shares					5,069,200
Gross proceeds					$ 167,000
Net proceeds					$ 161,000
Over-Allotment Option [Member]
Equity [Abstract]
Shares issued (in shares) | shares					661,200
Private Placement [Member] | Algonquin [Member]
Equity [Abstract]
Ownership interest				44.20%
Shares issued (in shares) | shares				4,020,860
Gross proceeds				$ 133,000
At the Market Program [Member]
Equity [Abstract]
Nominal value per share (in dollars per share) | $ / shares						$ 38.18	$ 38.18
Shares issued (in shares) | shares						644,059	644,059
Net proceeds						$ 24,000
At the Market Program [Member] | Top of range [member]
Equity [Abstract]
Amount of offering						$ 150,000	$ 150,000
Share Premium [Member]
Equity [Abstract]
Reduction of share premium							$ (200,000)

Corporate debt, Breakdown of co

Corporate debt, Breakdown of corporate debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Corporate debt [Abstract]
Non-current	$ 1,009,128	$ 970,077
Current	20,951	23,648
Total Corporate Debt	$ 1,030,079	$ 993,725

Corporate debt, Details of corp

Corporate debt, Details of corporate debt (Details) $ / shares in Units, $ in Thousands, € in Millions

1 Months Ended

9 Months Ended

Apr. 30, 2019USD ($)

Sep. 30, 2021USD ($)

Sep. 30, 2020USD ($)

Sep. 30, 2021EUR (€)

May 18, 2021USD ($)

Dec. 31, 2020USD ($)

Dec. 31, 2020EUR (€)

Dec. 04, 2020USD ($)

Dec. 04, 2020EUR (€)

Jul. 29, 2020USD ($)

Jul. 17, 2020USD ($)$ / sharesshares

Jul. 08, 2020USD ($)

Jul. 08, 2020EUR (€)

Mar. 31, 2020USD ($)

Mar. 31, 2020EUR (€)

Dec. 31, 2019USD ($)

Oct. 08, 2019USD ($)

Oct. 08, 2019EUR (€)

Apr. 30, 2019EUR (€)

May 10, 2018USD ($)

Jul. 20, 2017USD ($)

Jul. 20, 2017EUR (€)

Corporate debt [Abstract]

Corporate debt

$ 1,030,079

$ 993,725

Amount drawn

409,023

$ 673,648

2017 Credit Facility [Member]

Corporate debt [Abstract]

Corporate debt

$ 20

41

Maturity date

July 1, 2023

2017 Credit Facility [Member] | Top of Range [Member]

Corporate debt [Abstract]

Credit facility amount

$ 11,600

€ 10

2017 Credit Facility [Member] | EURIBOR [Member]

Corporate debt [Abstract]

Adjustment to interest rate

2.00%

2.00%

2017 Credit Facility [Member] | EURIBOR [Member] | Bottom of Range [Member]

Corporate debt [Abstract]

Adjustment to interest rate

0.00%

0.00%

2017 Credit Facility [Member] | LIBOR [Member]

Corporate debt [Abstract]

Adjustment to interest rate

2.00%

2.00%

2017 Credit Facility [Member] | LIBOR [Member] | Bottom of Range [Member]

Corporate debt [Abstract]

Adjustment to interest rate

0.00%

0.00%

Revolving Credit Facility [Member]

Corporate debt [Abstract]

Credit facility amount

$ 450,000

$ 425,000

$ 215,000

Corporate debt

13,643

Amount drawn

15,000

Credit facility amount available

$ 425,000

415,000

Revolving Credit Facility [Member] | Maturity December 31, 2022 [Member]

Corporate debt [Abstract]

Maturity date

December 31, 2022

Revolving Credit Facility [Member] | Maturity December 31, 2023 [Member]

Corporate debt [Abstract]

Maturity date

December 31, 2023

Eurodollar Rate Loans [Member] | Bottom of Range [Member]

Corporate debt [Abstract]

Adjustment to interest rate

1.60%

Eurodollar Rate Loans [Member] | Top of Range [Member]

Corporate debt [Abstract]

Adjustment to interest rate

2.25%

Base Rate Loans [Member] | Bottom of Range [Member]

Corporate debt [Abstract]

Adjustment to interest rate

0.60%

Base Rate Loans [Member] | Top of Range [Member]

Corporate debt [Abstract]

Adjustment to interest rate

1.00%

Base Rate Loans [Member] | Federal Funds Rate [Member]

Corporate debt [Abstract]

Adjustment to interest rate

0.50%

Base Rate Loans [Member] | LIBOR [Member]

Corporate debt [Abstract]

Adjustment to interest rate

1.00%

Letters of Credit [Member]

Corporate debt [Abstract]

Credit facility amount

$ 100,000

Amount drawn

$ 10,000

Note Issuance Facility 2019 [Member]

Corporate debt [Abstract]

Fixed interest rate

4.24%

4.24%

Credit facility amount

$ 310,000

€ 268

Corporate debt

343,999

Maturity date

April 30, 2025

Interest capitalization period

2 years

Note Issuance Facility 2019 [Member] | EURIBOR [Member]

Corporate debt [Abstract]

Variable interest period

3 months

Adjustment to interest rate

4.50%

4.50%

Commercial Paper [Member]

Corporate debt [Abstract]

Corporate debt

$ 13,288

21,224

Short term notes issued amount

$ 13,300

€ 11.5

20,100

€ 17.4

$ 58,000

€ 50

Term of short term notes

2 years

Percentage average cost of issued short term notes

0.53%

2020 Green Private Placement [Member]

Corporate debt [Abstract]

Principal amount

$ 336,000

€ 290

Corporate debt

$ 333,351

351,315

Adjustment to interest rate

1.96%

1.96%

Maturity date

June 2026

Note Issuance Facility 2020 [Member]

Corporate debt [Abstract]

Fixed interest rate

5.25%

5.25%

Credit facility amount

$ 162,000

€ 140

Corporate debt

$ 158,551

166,846

Maturity period

7 years

Green Exchangeable Notes Due 2025 [Member]

Corporate debt [Abstract]

Fixed interest rate

4.00%

Corporate debt

$ 104,930

104,227

Maturity date

July 15, 2025

Principal amount of notes issued

$ 15,000

$ 100,000

Exchange rate of notes (in shares) | shares

29.1070

Principal amount of notes for exchange rate

$ 1,000

Initial exchange price of notes (in dollars per share) | $ / shares

$ 34.36

Amount of transaction date of fair value fair value are accounted for through the profit and loss statement

$ 10,000

Bank Loan [Member]

Corporate debt [Abstract]

Fixed interest rate

2.50%

2.50%

Corporate debt

$ 5,764

$ 6,073

$ 5,800

€ 5

Maturity date

December 4, 2025

Green Senior Notes Due 2028 [Member]

Corporate debt [Abstract]

Principal amount

$ 400,000

Fixed interest rate

4.125%

Corporate debt

$ 400,532

Maturity date

May 15, 2028

Corporate debt, Repayment sched

Corporate debt, Repayment schedule (Details) $ in Thousands, € in Millions	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 04, 2020USD ($)	Dec. 04, 2020EUR (€)
Repayment schedule [Abstract]
Corporate debt	$ 1,030,079	$ 993,725
Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	16,925
Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	4,026
Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2021 [Member]
Repayment schedule [Abstract]
Corporate debt		23,648
2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
2023 [Member]
Repayment schedule [Abstract]
Corporate debt	15,561	2,036
2024 [Member]
Repayment schedule [Abstract]
Corporate debt	1,930	2,036
2025 [member]
Repayment schedule [Abstract]
Corporate debt	105,857	448,133
Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	885,780	517,872
2017 Credit Facility [Member]
Repayment schedule [Abstract]
Corporate debt	20	41
2017 Credit Facility [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	20
2017 Credit Facility [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2017 Credit Facility [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2017 Credit Facility [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt		41
2017 Credit Facility [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
2017 Credit Facility [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
2017 Credit Facility [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
2017 Credit Facility [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	0	0
2017 Credit Facility [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Revolving Credit Facility [Member]
Repayment schedule [Abstract]
Corporate debt	13,643
Revolving Credit Facility [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	12
Revolving Credit Facility [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Revolving Credit Facility [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Revolving Credit Facility [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	13,631
Revolving Credit Facility [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Revolving Credit Facility [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	0
Revolving Credit Facility [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	0
Commercial Paper [Member]
Repayment schedule [Abstract]
Corporate debt	13,288	21,224
Commercial Paper [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	9,262
Commercial Paper [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	4,026
Commercial Paper [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Commercial Paper [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt		21,224
Commercial Paper [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Commercial Paper [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Commercial Paper [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Commercial Paper [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	0	0
Commercial Paper [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
2020 Green Private Placement [Member]
Repayment schedule [Abstract]
Corporate debt	333,351	351,315
2020 Green Private Placement [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	329
2020 Green Private Placement [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2020 Green Private Placement [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2020 Green Private Placement [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt		289
2020 Green Private Placement [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
2020 Green Private Placement [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
2020 Green Private Placement [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
2020 Green Private Placement [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	0	0
2020 Green Private Placement [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	333,022	351,026
Note Issuance Facility 2020 [Member]
Repayment schedule [Abstract]
Corporate debt	158,551	166,846
Note Issuance Facility 2020 [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Note Issuance Facility 2020 [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Note Issuance Facility 2020 [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Note Issuance Facility 2020 [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Note Issuance Facility 2020 [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Note Issuance Facility 2020 [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Note Issuance Facility 2020 [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Note Issuance Facility 2020 [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	0	0
Note Issuance Facility 2020 [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	158,551	166,846
Green Exchangeable Notes [Member]
Repayment schedule [Abstract]
Corporate debt	104,930	104,227
Green Exchangeable Notes [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	967
Green Exchangeable Notes [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Green Exchangeable Notes [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Green Exchangeable Notes [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt		2,083
Green Exchangeable Notes [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Green Exchangeable Notes [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Green Exchangeable Notes [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Green Exchangeable Notes [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	103,963	102,144
Green Exchangeable Notes [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Bank Loan [Member]
Repayment schedule [Abstract]
Corporate debt	5,764	6,073	$ 5,800	€ 5
Bank Loan [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	10
Bank Loan [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Bank Loan [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Bank Loan [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt		11
Bank Loan [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Bank Loan [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	1,930	2,036
Bank Loan [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	1,930	2,036
Bank Loan [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	1,894	1,990
Bank Loan [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	0	0
Green Senior Notes [Member]
Repayment schedule [Abstract]
Corporate debt	400,532
Green Senior Notes [Member] | Remainder of 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	6,325
Green Senior Notes [Member] | Between January and September 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Green Senior Notes [Member] | Between October and December 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Green Senior Notes [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Green Senior Notes [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Green Senior Notes [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt	0
Green Senior Notes [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	$ 394,207
Note Issuance Facility 2019 [Member]
Repayment schedule [Abstract]
Corporate debt		343,999
Note Issuance Facility 2019 [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Note Issuance Facility 2019 [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Note Issuance Facility 2019 [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Note Issuance Facility 2019 [Member] | 2024 [Member]
Repayment schedule [Abstract]
Corporate debt		0
Note Issuance Facility 2019 [Member] | 2025 [member]
Repayment schedule [Abstract]
Corporate debt		343,999
Note Issuance Facility 2019 [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt		$ 0

Project debt, Details of projec

Project debt, Details of project debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Project debt [Abstract]
Cash held to satisfy non-recourse debt agreements	$ 287,000	$ 280,000
Non-current	4,568,387	4,925,268
Current	710,493	312,346
Total Project debt	5,278,880	$ 5,237,614
Increase in project debt during period	325,000
Kaxu [Member]
Project debt [Abstract]
Current	$ 349,000

Project debt, Repayment schedul

Project debt, Repayment schedule (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Repayment schedule [Abstract]
Project debt	$ 5,278,880	$ 5,237,614
Remainder of 2021 [Member]
Repayment schedule [Abstract]
Interest payment	59,366
Nominal repayment	163,975
Between January and September 2022 [Member]
Repayment schedule [Abstract]
Project debt	166,131
Between October and December 2022 [Member]
Repayment schedule [Abstract]
Project debt	163,122
2021 [Member]
Repayment schedule [Abstract]
Interest payment		19,287
Nominal repayment		293,059
2022 [Member]
Repayment schedule [Abstract]
Project debt		328,364
2023 [Member]
Repayment schedule [Abstract]
Project debt	359,313	355,806
2024 [Member]
Repayment schedule [Abstract]
Project debt	373,083	371,548
2025 [Member]
Repayment schedule [Abstract]
Project debt	504,196	508,843
Subsequent Years [Member]
Repayment schedule [Abstract]
Project debt	$ 3,489,692	$ 3,360,707

Grants and other liabilities (D

Grants and other liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)Type	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Grants and other liabilities [Abstract]
Grants	$ 986,914		$ 1,028,765
Other Liabilities	284,546		201,002
Grants and other non-current liabilities	$ 1,271,460		1,229,767
Number of grant types | Type	2
Income from grants	$ 44,449	$ 44,256
Finance lease liabilities	60,000		52,000
Dismantling provisions	125,000		88,000
Solana and Mojave [Member]
Grants and other liabilities [Abstract]
Income from grants	44,100	$ 44,200
U.S. Department of Treasury [Member]
Grants and other liabilities [Abstract]
Grants	650,000		674,000
Federal Financing Bank [Member]
Grants and other liabilities [Abstract]
Grants	$ 332,000		$ 352,000

Trade payables and other curr_3

Trade payables and other current liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Trade payables and other current liabilities [Abstract]
Trade accounts payable	$ 75,547	$ 54,219
Down payments from clients	5,460	416
Other accounts payable	37,593	37,922
Total	$ 118,600	$ 92,557

Income Tax (Details)

Income Tax (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Income Tax [Abstract]
Income tax expense (income)	$ 42,390	$ 25,079
Profit before income tax	$ 35,944	$ 83,246

Financial expense, net (Details

Financial expense, net (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financial income [Abstract]
Interest income from loans and credits		$ 1,549	$ 6,124
Interest rate gains on derivatives: cash flow hedges		299	288
Total		1,848	6,413
Financial expenses [Abstract]
Expenses due to interest - Loans from credit entities		(180,898)	(186,769)
Expenses due to interest - Other debts		(51,167)	(56,578)
Interest rate losses on derivatives: cash flow hedges		(44,935)	(46,092)
Total		(277,000)	(289,439)
Other financial income / (expenses) [Abstract]
Other financial income		35,355	162,984
Other financial losses		(13,671)	(100,387)
Total		21,684	$ 62,597
Kaxu [Member]
Other financial income / (expenses) [Abstract]
Income for non-monetary change to fair value of derivatives		5,600
Kaxu [Member] | Notes Conversion Option [Member]
Other financial income / (expenses) [Abstract]
Income for non-monetary change to fair value of derivatives		$ 13,900
Solana [Member]
Other financial income / (expenses) [Abstract]
Other financial income	$ 145,000
Helios 1 & 2 [Member]
Other financial income / (expenses) [Abstract]
Other financial losses	$ (72,000)

Other operating income and ex_3

Other operating income and expenses (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Other operating income [Abstract]
Grants (Note 16)	$ 44,449	$ 44,256
Insurance proceeds and other	13,148	31,646
Total	57,597	75,902
Other operating expenses [Abstract]
Raw materials and consumables used	(64,756)	(4,919)
Leases and fees	(6,451)	(2,388)
Operation and maintenance	(117,750)	(77,133)
Independent professional services	(27,297)	(28,509)
Supplies	(25,270)	(20,433)
Insurance	(33,943)	(27,990)
Levies and duties	(25,948)	(30,523)
Other expenses	(19,457)	(5,740)
Total	$ (320,873)	$ (197,635)

Earnings per share (Details)

Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Earnings per share [Abstract]
Potential issuance of shares on settlement of Green Exchangeable Notes (in shares)	3,347,305	3,347,305
Potential issuance of subsribed shares (in shares)		510,169
Profit/(loss) attributable to Atlantica	$ (18,166)	$ 61,209
Average number of ordinary shares outstanding - basic (in shares)	110,749,000	101,602,000
Average number of ordinary shares outstanding - diluted (in shares)	114,156,000	102,499,000
Earnings per share for the period - basic (in dollars per share)	$ (0.16)	$ 0.60
Earnings per share for the period - diluted (in dollars per share)	$ (0.16)	$ 0.60

Subsequent events (Details)

Subsequent events (Details) - Subsequent Events [Member]	Nov. 09, 2021$ / shares
Dividends Approved [Abstract]
Dividend declaration date	Nov. 9, 2021
Dividend approved (in dollars per share)	$ 0.435
Dividend approved expected date to be paid	Dec. 15, 2021