When I installed my inverter, I found the romex wires FROM the circuit breaker, that feeds many of the outlets.
I cut it and wired in a transfer switch designed for inverters.
Now when power is lost, the switch transfers to the waiting inverter.
No switching off the fridge, water heater, ACs, converters or microwave.
The TV, Sat. dish, sound bar, and phone chargers all stay on. The coffee maker, mixer and bath room appliances all work, when needed.
We had a power failure last night. We knew because the microwave timer shut off, while we were watching TV. The fridge went to gas and we didn't even need to get up.
It came back on 15 minutes latter. We heard the micro beep.
If I get a residental fridge, it will be wired in also.