Most coaches have some sort of battery disconnect that will remove the coach batteries from the circuit.
In storage, you typically disconnect the batteries so they are not drained by the various small circuits that are on all the time... stereo keep alive, antenna power, etc.
When in operation, the battery should auto-connect to the house (at least mine works this way) when you plug into shorepower so the charger in the converter/distribution panel can charge the house battery.
This is how it should work in general... your situation may be different depending on how it was built, features you have, and so on.
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