Originally Posted by gmc
Since you mention 'pass through' mode - it implies a transfer switch built in to the inverter... The capacity of that transfer switch is a limiting factor - as is the circuit breaker feeding the inverter...
These limits will be whether you are running on the inverter - or shore/genny power.
And remember - the AC power can always fail - dumping whatever load you were running onto the inverter...
If you don't intend to use it with the air conditioning, then I wouldn't wire it to the inverter output... Don't know which particular inverter you are looking at - but to power multiple existing circuits with an inverter, ideally feed it with its max capacity circuit on the AC side - of course your 12v power, and run output to a subpanel - moving any circuits you want controlled from the main panel to the subpanel...
The sub panel is a great idea I never considered.
The inverter I'm looking at is the AIMS Power PICOGLF40W12V240VS 4000W 120/240V AC Pure Sine Split Phase Inverter Charger
I'll have to look for the specs on the capacity of the switch.