The inverter will usually have an inline RELAY, which senses 120v power from Shore or the Generator, then simply 'passes thru' this power to the breakers/circuits that are normally powered by the Inverter.
It initially sounds like this relay is not switching over, or not 'sensing' the 120v power from the Shore or Gen - which makes me believe that either the relay is not acting correctly, OR your 'INVERTER/Charger' breaker is tripped(giving no ability for 120v power to/thru the Charger and Inverter).
Do you have a Magnum ME2012 inverter and similar ME-RC remote panel?
Is your House Batteries holding a charge, or being CHARGED when you are on shore power or the generator? The levels should show about 13.5 or higher if under the Charger's output while on shore or generator.
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the Turners...
two Campers, two Electric cars
former diesel pusher traveler
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