I have a 3kw inverter/charger on my trailer. It charges (up to) 150 amps, and runs 3kw with a 6kw surge. I run the microwave, coffee pot, toaster etc off it. I CAN run one of the ac's (it is wires after the inverter) but the batteries get run down in a hurry. The big advantage is it is totally automatic. Start the genset and you are charging the batteries, shut it down, and you are on the inverter. I wired the power line from the transfer switch to a hut tub sub panel (4 position box) with 2 30's for the inverter/charger (it is rated for 30+30) and 2 20's - one for the main ac, one for the electric water heater. The main ac and electric water heater can never run off the inverter, the bedroom ac and EVERYTHING else can.
