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4.5 All Maximizers Not Communicating

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Written by Ollie Wells

Symptoms:

  • All Maximizers are not communicating.

Troubleshooting Steps:

  • Note: Maximizers need very little sunlight to communicate.

  • Check Grafana for faults:

    • PV_BUS_MISMATCH_STATUS fault flagged on the TRM alert matrix — indicates a potential reverse polarity miswire.

    • GIRM_SELF_TEST_FAULT fault flagged on the TRM FUSA alert matrix — indicates a ground fault. Go through ground fault troubleshooting. A pinched maximizer wire under a PV module is a common cause of this fault.

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