Path-Q Solar
How can I determine whether panel degradation is covered by the product warranty?
Answer
Compare a documented, appropriately measured loss in module output with the exact product warranty's degradation threshold, time period, exclusions, claim procedure, and proof requirements. A lower bill or a single low-production day is not enough to establish degradation.
Key points
- Identify the exact module model, serial numbers, purchase date, and warranty version.
- Use monitoring history, weather-adjusted production data, and, where needed, electrical testing to separate degradation from shading, soiling, faults, clipping, or inverter limitations.
- Warranty coverage may depend on installation conditions, authorized procedures, transfer rules, and whether the claimed loss exceeds the stated threshold.
What it depends on
- Exact product warranty terms
- Age and operating history of the modules
- Reliability of production measurements
- Whether another system fault explains the apparent loss
Risks and trade-offs
- Testing can involve service charges or access costs that may not be reimbursed.
- A warranty claim can be weakened by incomplete records or an unsupported comparison baseline.
Information you may need
- Module make, model, serial numbers, and installation date
- Warranty document and proof of purchase or ownership
- Long-term production records and relevant weather or shading information
- Any inspection or test reports
Your next step
What to do next
Obtain the exact warranty document, establish a comparable production baseline, and ask the manufacturer or installer what measurements are required for a claim.
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