Solar Panel Warranties Explained: What's Actually Covered?

Product Warranty vs Performance Warranty

Every solar panel comes with two separate warranties. The product warranty (typically 12-25 years) covers manufacturing defects — cracked glass, faulty junction boxes, delamination. The performance warranty (typically 25-30 years) guarantees minimum power output over time, usually 80-90% of rated capacity at year 25.

• Product warranty: covers defects in materials and workmanship
• Performance warranty: guarantees minimum energy output over time
• Premium panels (REC, Q CELLS) offer 25-year product + 25-year performance
• Budget panels may offer only 12-year product warranties

What Can Void Your Warranty

Solar panel warranties can be voided by improper installation, physical damage, unauthorized modifications, or failure to maintain the system. This is why choosing a reputable installer matters — if your installer goes out of business, warranty claims become significantly harder.

• Improper installation by uncertified contractors
• Physical damage from impacts (not covered under most warranties)
• Unauthorized modifications to panels or wiring
• Failure to maintain panels per manufacturer guidelines

Inverter Warranties

Inverters typically have shorter warranties than panels — 10-15 years for string inverters, 25 years for microinverters (Enphase) and power optimizers (SolarEdge). Since inverters are the most likely component to need replacement, the warranty length matters significantly for long-term costs.

Battery Storage Warranties

Tesla Powerwall comes with a 10-year warranty covering both the battery and its integrated inverter. The warranty guarantees 70% capacity retention at the end of the warranty period. Other batteries like Enphase IQ and Franklin WH offer similar 10-12 year coverage.

How Sunlink Protects You

Sunlink's marketplace model adds an extra layer of protection. Because we vet every installer in our network and maintain ongoing relationships, warranty claims are handled efficiently. Sunlink Care+ extends coverage beyond manufacturer warranties with annual inspections and priority service.