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401

Grid fault

SMA · Sunny Boy Solar Inverter

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The inverter has disconnected from the utility grid because it detected a stand-alone grid condition or a very large change in the power frequency. This protects the inverter and grid from unstable power conditions.

Vanlige årsaker

  • Detection of a stand-alone grid (island operation).
  • Significant short-term fluctuations in the power frequency of the utility grid.

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  1. 1

    Check the grid connection for significant short-term frequency fluctuations.

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Verifisert teknisk data. Sist oppdatert: March 2026

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