Path-Q Solar
What records should a home buyer request to verify the performance of existing solar panels?
Answer
Request multi-year monitoring and utility records, system specifications, installation and inspection documents, maintenance and repair history, and warranty information. Compare reported production with expected production after accounting for weather, shading, outages, and changes in equipment.
Key points
- Obtain monitoring exports showing monthly or daily production, not only a current dashboard screenshot.
- Request utility bills or interval data to corroborate system output and identify grid imports and exports.
- Collect the system design, panel and inverter models, commissioning date, warranties, permits, and inspection approvals.
- Review fault alerts, inverter replacements, service visits, panel replacements, roof work, and unresolved issues.
What it depends on
- System age and monitoring-platform availability
- Whether the seller retained historical utility records
- Original production estimate and design assumptions
- Changes in shading, roof condition, or equipment
Risks and trade-offs
- Monitoring data may be incomplete or may measure production differently from the utility meter.
- High production in one recent period does not prove long-term performance.
- Bill savings cannot be inferred from production alone because rates, credits, and household use vary.
Information you may need
- At least several years of production history where available
- Utility bills or meter data
- Original proposal, design, and commissioning report
- Maintenance, fault, warranty, permit, and inspection records
Your next step
What to do next
Ask the seller to authorize a monitoring-data export and assemble the records for an independent solar and home inspection before the purchase deadline.
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