How much electricity do you use? I have a low range inverter (5KW) and it can give me 4.5kw sustained power from my battery and as much as I want from the grid because it acts as a pass through. At 220V that's 20Amps, or 40A I guess with your American 110V supply.

Add another battery and bigger inverter and you can double that. Unless you've got a kiln or perpetually running hot water heating, I'm left baffled.