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Solar Panel limits in Summer

  • April 28, 2026
  • 26 replies
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26 replies

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  • Rank 5
  • June 5, 2026

Looks like my on/off-grid switching problem has been fixed. Had a chance to talk to the installer’s chief techie this morning and it seems that when the system was installed, the inverter/control box was set to the wrong country. It’s a Sigen box and apparently has settings to match grid connections for the countries in which it is sold - but for some reason it was not set to “UK” when it was installed. It would ramp up the output, hit whatever limit it had been set to, go off-grid for “protection”, and the cycle would repeat. Now seeing consistent output that even peaks at higher than the nominal max power rating of the panels for short periods.