I now have four separate battery channels. One is for 12 volt only, used for outside night lights. Seems to be working fine. Of course, I don't use all the energy being stored every day. AND, all my batteries are free to me. They are used golf cart batteries, but still run ok.
Will use a 400 watt inverter just for the swamp cooler. A 1500 watt for the model railroad, and a 1000 watt for the shop.
I have 18 six volt batteries in four sets.
My cells are rated for 600 watt output, at about 35 amps max, 12 volt systems.