Stoffel Posted April 5, 2022 Posted April 5, 2022 .I have 1 UP5000 Pylontech battery connected to a Growatt SPF 5000 inverter The inverter sometimes go to alarm mode 20(BMS communication error ) for 2 minutes and reset itself after two minutes and operate normal for days . This has now occurred twice. What could be the cause of this error? Quote
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