Ok I am in process of figuring solar needs for garage for rv storage. I have had a watt meter on the shore pores line for 286hrs and got a kw reading of 20.56 kw. If i divide the 286by 20.56 and get I get 13.91 watts per hour. If I an going to have one 100amp lithium battery which is 1200watts. I then divide 1200 by 13.91 and get 86.26hrs divided by 24 = 3.5 days, of battery to use. DidI figuring correctly? I know you can't figure on the full 1200watts from battery.