Path-Q Solar

What production evidence should a home buyer request when an existing system has been repaired but no post-repair test was completed?

Answer

Request evidence that isolates the repair's effect: the repair report, pre- and post-repair monitoring data if available, inverter or optimizer readings, inspection results, and a new measured production or commissioning test. If no post-repair evidence exists, treat system performance as unverified and seek a test or price protection before purchase.

Key points

  • Obtain the fault description, failed components, repair date, parts used, and technician findings.
  • Request production data with weather or irradiance context for a meaningful period before and after repair.
  • Check inverter, string, optimizer, battery, and monitoring alerts for recurring or unresolved faults.
  • Compare measured output with a current independent production estimate, allowing for shading and weather.
  • Do not treat a system merely being online as proof that it is producing as expected.

What it depends on

  • Repair scope and component history
  • Monitoring availability and data quality
  • Weather, shading, and system orientation
  • Independent inspection and testing options
  • Purchase contract and seller cooperation

Risks and trade-offs

  • A short test period may miss intermittent faults or seasonal underperformance.
  • Historical data can be incomplete, manipulated, or not comparable across weather conditions.
  • Further testing may require access, time, or temporary monitoring equipment.
  • Accepting unverified performance transfers uncertainty to the buyer.

Information you may need

  • Repair invoices and technician report
  • Pre- and post-repair production and fault logs
  • Current equipment and monitoring access
  • Independent test or inspection report
  • Seller warranty or credit proposal if testing is incomplete

Your next step

What to do next

Make the purchase decision contingent on an independent post-repair inspection and documented production test, or negotiate a risk-adjusted credit or holdback.

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SQ03104