Watt meter readings

[bartrak]

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.

 

[DThames]

Some of your unit terms are incorrect and confuse the issue. Try to look at everything in Kilowatt Hours. Ideally, Kwh per day would be best for your power used number.

So you had your meter on about 12 days. So about 1.7kwh per day 20.5kwh/(286hr/24hr per day). Your battery will be about 1.2kwh or round down to 1.0 if you want to baby your battery. Your battery will last less than one day with those numbers. 2 batteries in parallel should last a full day.