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WARRANTY OBLIGATIONS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) | $ (1,983) | $ 927 | $ (8,618) | $ 22,902
Minimum |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Product warranty, term |  |  | 10 years |
Maximum |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Product warranty, term |  |  | 15 years |
Product Replacement Costs Related To Enphase IQ Battery Systems |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) | (9,200) |  | $ (29,700) |
Field Performance Data And Diagnostic Root-Cause Failure Analysis |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) | 6,000 |  | 16,600 | 14,000
Prior Generation Products |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) | 700 |  |  |
Product Replacement Costs Related To Other Products |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) | $ 500 |  | (1,600) |
Change In Warranty Period |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) |  |  | $ 6,100 |
Expedited Freight Costs And Replacement Costs |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) |  |  |  | 4,900
Labor Reimbursement Rate |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Change in estimates, increase (decrease) |  |  |  | $ 4,000

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- Definition Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-8 + Details
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