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WARRANTY OBLIGATIONS - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Product Warranty Liability [Line Items]        
Additional warranty expense (benefit) $ (275) $ (10,363) $ (12,636) $ (6,635)
IQ Battery | Minimum        
Product Warranty Liability [Line Items]        
Product warranty, term   10 years   10 years
IQ Battery | Maximum        
Product Warranty Liability [Line Items]        
Product warranty, term   15 years   15 years
Product Replacement Costs Related To Enphase IQ Battery Systems        
Product Warranty Liability [Line Items]        
Additional warranty expense (benefit) (1,800) $ (14,400) (11,100) $ (20,500)
Field Performance Data And Diagnostic Root-Cause Failure Analysis Related to Enphase IQ Battery Storage Systems        
Product Warranty Liability [Line Items]        
Additional warranty expense (benefit) (1,400) 9,900 (4,400)  
Field Performance Data And Diagnostic Root-Cause Failure Analysis To Other Products        
Product Warranty Liability [Line Items]        
Additional warranty expense (benefit) $ 2,900   $ 2,900  
Product Replacement Costs Related To Other Products        
Product Warranty Liability [Line Items]        
Additional warranty expense (benefit)   (2,100)   (2,100)
Change In Warranty Period        
Product Warranty Liability [Line Items]        
Additional warranty expense (benefit)   $ 6,100   $ 6,100