While batteries may seem like a good idea, they have a number of disadvantages in pumping systems. First, they reduce the efficiency of the overall system. Second, they are another source of problems and maintenance. Third, they add cost to the system. The occasions when batteries may be necessary is when the use of a cistern to store the water is not possible and water needs to be pumped during the night or during cloudy conditions. We would only suggest using batteries in a solar water pumping system as a last resort or if you already have a home power system installed that is close to the well head.
Should I use batteries in my solar pumping system?
