Ok,I have a system that pumps 4.5 gpm at 360 foot head at peak.Lets say I have 6 hours peak per day.But to fulfill my needs I need an addintional 3hours per day.It takes 910 watts to get the 4.5 gallons.How many add. watts and Batteries do I need to do this.Thanks Upper
Thanks Rick,So how big is my battery array?
For 9 hrs, ~8200 w-h.
8200-5500 = 2700 w-h.
To get this out of batts. you probably need to put in (8/5)2700 = 4300 w-h
Solar insolation is about 1kW/sq. meter and photovoltaic is probably 10% efficient.