Multiplus II no lights, unable to turn on

DIY
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1

This is a camper trailer install with Multiplus II and lithium batteries + solar charging. I was troubleshooting GFCI tripping upon return from a trip (about 1 year of shore power from residence, then all of a sudden tripping) and trying some things recommended with Victron community, and for no apparent reason, Inverter will not turn on in any mode - no lights. Pushed 30 amp reset breaker to no avail. Is there an internal breaker of some sort?

2

This situation was resolved by disconnecting all loads and the batteries for 30 minutes and reconnecting. All operations restored to normal.