Just a piece of information about the automatic switching (at least in my vintage Liberty).

The way it has been set up, AC power defaults to the best source. In the absence of CG or generator power the switch allows the inverter power to pass into the AC circuit breaker panel.

If CG power is connected to the coach the relay closes so CG goes to the panel. If the generator is running, even if hooked up to CG power the transfer defaults to the generator in essence dropping the CG power off line and now generator power goes to the AC panel. This switching occurs because a relay "sees" power from a specific source and switches to provide that power source to the coach panel.

It is my understanding that if the inverter switches are "on" and in the case of Liberty coaches where the inverter battery charging circuit has its own dedicated AC circuit shore power flows to the refrigerator (for example) through a relay that closes essentially taking power away from the inverter. Because the battery charging portion of the inverter is separately powered it continues to function.