Solar Panel Warranty Guide (2026)
Published 2026-02-20 · Updated 2026-07-07 · MySunROI Research Team
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Solar warranties have two parts: product warranty (defects, ~12–25 years) and performance warranty (minimum output, ~25 years). Inverter and workmanship warranties are separate.
Warranty types
- Product: materials and manufacturing defects
- Performance: 80–90% output at year 25
- Workmanship: installer labor warranty 10–25 years
Making a claim
Contact your installer first. Document monitoring data showing underperformance. Manufacturer may test or replace panels.
Solar costs by state
Frequently Asked Questions
Does warranty transfer on home sale?
Usually yes for owned systems — verify with manufacturer and installer.