| Cover Page Cover Page | Jul. 30, 2019 |
| Cover page. | |
| Entity Central Index Key | 0001463101 |
| Document Type | 8-K |
| Document Period End Date | Jul. 30, 2019 |
| Entity Registrant Name | ENPHASE ENERGY, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35480 |
| Entity Tax Identification Number | 20-4645388 |
| Entity Address, Address Line One | 47281 Bayside Parkway |
| Entity Address, City or Town | Fremont |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94538 |
| City Area Code | 707 |
| Local Phone Number | 774-7000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.00001 par value per share |
| Trading Symbol | ENPH |
| Security Exchange Name | NASDAQ |
| Security Exchange Name | false |
| Amendment Flag | false |
