Path-Q Solar

How can I identify whether a production drop is caused by shade or equipment failure?

Answer

Look for timing and pattern: shade usually follows a repeatable daily or seasonal pattern and affects particular sections, while equipment failure may begin abruptly, persist during suitable sun, produce alerts, or affect output inconsistently with the shade pattern.

Key points

  • Compare production by time of day and season with historical data.
  • Check whether new trees, structures, dirt, or temporary obstructions changed the pattern.
  • Compare affected strings or panels when the monitoring system supports that view.

What it depends on

  • Time-resolved production data
  • Historical shade conditions
  • System monitoring resolution
  • Weather and soiling

Risks and trade-offs

  • Clouds and changing weather can mimic irregular equipment behavior.
  • A shade pattern does not rule out a simultaneous equipment fault.
  • Physical electrical testing should be performed by a qualified provider.

Information you may need

  • Hourly or interval production
  • Panel or string-level data
  • Recent site changes
  • Fault and alert history

Your next step

What to do next

Compare the output pattern on clear days with prior clear-day data and give the provider the timestamps, affected sections, and any fault messages.

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SQ01052