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WARRANTY OBLIGATIONS - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($) country	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($) country
Product Warranty Liability [Line Items]
Change in estimates, increase (decrease)	$ 707	$ 4,584	$ 13,937	$ (8,052)
Product warranty, product warranty replacements, number of countries | country		9		9
Microinverter
Product Warranty Liability [Line Items]
Product warranty, term		20 years		20 years
Product Replacement Costs Related To Battery
Product Warranty Liability [Line Items]
Change in estimates, increase (decrease)	7,600		15,300	$ (15,500)
Enphase IQ Battery Storage System
Product Warranty Liability [Line Items]
Change in estimates, increase (decrease)	$ (6,900)		(6,900)	(4,400)
Defects In Materials
Product Warranty Liability [Line Items]
Change in estimates, increase (decrease)		$ 8,400		10,200
Change In Warranty Period
Product Warranty Liability [Line Items]
Change in estimates, increase (decrease)		500		500
Product Replacement Costs Related To IQ Battery
Product Warranty Liability [Line Items]
Change in estimates, increase (decrease)		$ (4,300)
Field Performance Data and Diagnostic Root-Cause Failure Analysis to Other Products
Product Warranty Liability [Line Items]
Change in estimates, increase (decrease)			$ 5,500	$ 1,100

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+ 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

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