Solar Energy 101
Understanding Solar Panel Warranty
Understanding warranty coverage — including defect protection and performance guarantees across panels, inverters, and batteries — helps you protect your investment and ensure long-term system reliability.
What's typically covered
- Solar panels: a 10–25 year product warranty against manufacturing defects, plus a 20–25 year performance warranty guaranteeing panels maintain around 80% of their original output.
- Inverters: typically a 5–10 year warranty, with a 10–15 year typical lifespan before replacement.
- Batteries: typically a 5–10 year warranty, retaining around 60–70% of storage capacity by the end of that coverage.
SMSolar's warranty
25 years
Product warranty on solar panels