I use 4, 12 volt, floor scrubber batteries (acid). they are hooked up series and parallel to give me 24 volts, which feeds a 4500 amp inverter with 100 amp smart charger they have worked great the last 5 years. I paid $200 Cnd each
I'm very interested in this idea but for both my daughters house and the anti-KOA, Menards here in this area, it's like home depot, has now started carrying 400 amp wind turbins for 499 and also 80 watt solar