This energy may be used to power DC pumps directly, or stored in rechargeable batteries to serve the pumps as required. A range of options are available. Water may be pumped from a well or surface source into a temporary storage facility, such as a tank or an elevated surface impoundment, then gravity-fed to the stock tank. Pumps may be controlled by floats in the stock tank to provide water when levels drop below a pre-determined point. Water may be pumped from deep wells or across distances, so the major limiting factor is power.
More power is produced by using larger or additional solar panels and batteries.
Therefore, the cost of the system is directly related to the amount of hardware needed to produce the power required. Install solar systems in an area with a clear view of the sun all day, if possible. Shadows from fence posts, trees and other obstructions reduce solar power production drastically. Stationary solar panels recharge batteries that provide power to the pumps. Prices vary according to size of the system, amount of water required and distance it must be pumped.