Right on...
and, I see your idea, but I don't think the Inverter knows or cares 'where' you are plugging in, whether on the unit itself, or on one of the circuits that it provides power to...since whenever the Inverter senses 120v Shore Power, it simply goes into 'silent' mode, and sends the power on thru to the circuits, only 'waking up' when the Shore Power is lost(if the Inverter is turned 'ON', of course).
Now, if you want to get creative, and do a little 'electrical' modifications, you 'could' conceivably turn OFF the circuit breaker that provides pass-thru Shore Power to your Inverter, thereby removing the ability for it to 'sense' any 120v power, and therefore, as long as it is turned ON, while be INVERTING to the outlet or the circuits wired to it.
The negative, though, is that the Inverter AND Shore Power will then both be in play, making for some confusion if not thought out correctly.
In my situation, though, this would not allow MY Battery Charger to function, as it is using that same breaker, and 120v power from the Shore.
YOUR Inverter, even if a Magnum brand, may work differently than mine, since the FACTORY decides how they want to wire your RV. You may only have the Fridge with Inverter power, or an additional outlet, and yours may also NOT have an integrated Battery Charger, which changes the equation.
__________________
|