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