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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) reporting_unit | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
AMPTC, income tax payable benefit | $ 157,500,000 | $ 53,500,000 |
AMPTC, cost of revenues reduction | 157,500,000 | 53,500,000 |
Accrued interest receivable | $ 10,100,000 | $ 7,600,000 |
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Prepaid Expense and Other Assets, Current | Prepaid Expense and Other Assets, Current |
Restricted cash | $ 95,000,000.0 |  |
Accounts receivable, allowance | 7,788,000 | $ 2,502,000 |
Property and equipment impairment charge | 2,300,000 | 5,700,000 | $ 0
Right of use asset impairment charges | $ 100,000 | 1,100,000 | 1,200,000
Number of reporting unit | reporting_unit | 1 |  |
Goodwill, impairment loss | $ 0 | 0 | 0
Impairment of intangible assets | 3,528,000 | 3,807,000 | 0
Advertising costs | 1,700,000 | $ 3,800,000 | $ 3,800,000
Prepaid Expenses and Other Current Assets |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
AMPTC, income tax payable benefit | 94,900,000 |  |
Income Tax Payable |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
AMPTC, income tax payable benefit | $ 62,700,000 |  |
Capitalized software costs |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Property, plant and equipment, useful life | 3 years |  |
One Customer |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Accounts receivable, allowance | $ 6,200,000 |  |
Minimum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Property, plant and equipment, useful life | 3 years |  |
Intangible assets, estimated useful life | 9 years |  |
Period failure rate measurement lags product sale | 3 months |  |
Minimum | Capitalized software costs |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Property, plant and equipment, useful life | 3 years |  |
Maximum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Property, plant and equipment, useful life | 10 years |  |
Intangible assets, estimated useful life | 5 years |  |
Period failure rate measurement lags product sale | 9 months |  |
Maximum | Capitalized software costs |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Property, plant and equipment, useful life | 5 years |  |
Monitoring Hardware And Service |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Service period | 7 years |  |
Monitoring Hardware And Service | Minimum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Capitalized contract cost, amortization period | 5 years |  |
Monitoring Hardware And Service | Maximum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Capitalized contract cost, amortization period | 7 years |  |
Subscription Contracts | Minimum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Service period | 3 months |  |
Subscription Contracts | Maximum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Service period | 12 months |  |
Microinverter, First and Second Generation |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 15 years |  |
Microinverter, Subsequent Generations | Maximum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 25 years |  |
Battery Products | Minimum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 10 years |  |
Battery Products | Maximum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 15 years |  |
IQ PowerPack 1500 |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 5 years |  |
IQ Gateway And IQ Energy Router |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 5 years |  |
EV Charger | Minimum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 1 year |  |
EV Charger | Maximum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 5 years |  |
Third and Fourth Generation | Minimum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 5 years |  |
Third and Fourth Generation | Maximum |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Product warranty, term | 25 years |  |

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