Path-Q Solar

What information should I gather before contacting my installer about lower-than-expected solar production?

Answer

Gather the affected dates, monitoring graphs, expected-versus-actual production, weather and shading information, inverter messages, recent utility or electrical work, and photos of visible conditions. This helps the installer separate a real production problem from a monitoring or seasonal variation.

Key points

  • Compare similar periods and account for cloud, snow, soiling, shading, and seasonal sun changes.
  • Record whether the issue affects the whole array, one string, or individual panels if that information is available.
  • Preserve alert messages and avoid resetting or modifying equipment before the provider reviews it.

What it depends on

  • The monitoring system's available history
  • The original production estimate and assumptions
  • Weather, shading, soiling, and obstruction changes
  • Any recent equipment, roof, utility, or electrical work

Risks and trade-offs

  • A short-term comparison can misidentify normal weather variation as equipment failure.
  • A monitoring outage can look like low production even when the system is operating.

Information you may need

  • System address and installation date
  • Monitoring screenshots or downloaded data
  • Inverter status and fault messages
  • Recent bills or meter data if available
  • Photos of panels, nearby shade, and visible damage

Your next step

What to do next

Create a dated summary with monitoring evidence and the original estimate, then send it to the installer with a request for diagnostic review.

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SQ01815