Solar: warranties compared
14 brands. We read every warranty so you don't have to. Checked through October 2026.
7 of 14 brands cover solar in full for one year or less. The longest full coverage is 25 years, from Sunrun, Tesla Energy and Enphase. 7 brands keep some parts covered after full coverage ends, and 1 keeps something covered for life.
Every brand, side by side
- 1SunPower90/100Full: 10 yearsPartial: to 25 yearsPartial covers: Solar panels and microinverters
- 2Sunrun65/100Full: 25 yearsNo partial coverage
- 3Tesla Energy65/100Full: 25 yearsNo partial coverageVaries by model line
- 4Enphase60/100Full: 25 yearsNo partial coverage
- 5GAF45/100Full: NonePartial: to lifetimePartial covers: Solar roofing system
- 6Qcells35/100Full: NonePartial: to 25 yearsPartial covers: Solar panel; Power outputCheck your model's manual
- 7BioLite32/100Full: 2 yearsNo partial coverage
- 8Bushnell32/100Full: 2 yearsNo partial coverage
- 9Jackery27/100Full: 2 yearsNo partial coverage
- 10Renogy18/100Full: NonePartial: to 3 yearsPartial covers: Inverter; Charge controllers and accessoriesVaries by model line
- 11Nature's Generator16/100Full: 1 yearNo partial coverage
- 12Goal Zero15/100Full: NonePartial: to 2 yearsPartial covers: Solar panel
- 13Bluetti13/100Full: NonePartial: to 1 yearPartial covers: Whole product
- 14Grape Solar13/100Full: NonePartial: to 1 yearPartial covers: Off-grid electronics and accessories
From each maker's published warranty. “Unverified” means we couldn't confirm the terms on the maker's own site. How we rate warranties
What these warranties often leave out
- Normal wear and tear5 of 14 brands
- Accidental breaks and misuse4 of 14 brands
- Water damage4 of 14 brands
- Scratches, dents and looks2 of 14 brands
- Batteries1 of 14 brands
- Leaks1 of 14 brands
How long stores give you to return it
Longest return window first, for solar.
- Lowe'sMost items90 days
- The Home DepotMost items90 days
From each store's published return policy, using its rule for solar where it has one. Member and holiday extensions aren't counted. Check yours before you buy.
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Questions shoppers ask
Which brand of solar has the best warranty?
On paper, SunPower scores highest, with 10 years of full coverage and longer coverage on some parts. Sunrun covers everything longest, at 25 years.
Is a long warranty on solar really that long?
Often not for the whole product. Many longer warranties cover only certain parts after the first year or two, and you usually pay for the labor. The bars above show full and partial coverage separately.
Do I need to register to get the warranty?
3 of 14 brands require registration for some of their coverage, often within a set number of days. Keep your receipt either way.
Forward the receipt and I-BUY.AI tracks the return window and warranty for you.