
Solar water pumps are used throughout the world for a number of innovative applications. If you are in a remote area and the cost of running traditional water piping is cost prohibitive, a
Solar panels to power the solar water pumps are sold separately from the pumps. Both the solar pump and the amount of solar panels you need depend upon how much water you are trying to pump in a day (in GPD or GPM) and the vertical head the pump needs to overcome.
Surface solar pumps can use suction to draw water vertically about 10-20 feet. However, once they have lifted that relatively small amount, surface solar pumps can then push water great distances - like 200 feet or more!
If the water level is below about 20 feet, and the solar pump will need to lift more than that, a submersible solar pump will work great and can lift vertical distances of up to 700 feet. Once you have selected the appropriate type and size of a solar pump, use the graph that accompanies the solar pump in order to calculate the correct number of watts of solar panels. Each solar pump manufacturer provides a graph or table showing how many watts of solar panels are needed for the specified voltages in order to produce the desired water flow.
Solar water pumps can be used with ponds, streams or wells (generally 4-6 inch well casings). They range in cost from $600-$3000. Most solar water pumps run directly off solar panels (PV direct) and do not require batteries. Using batteries may complicate an otherwise straight forward application. Instead of storing electricity in batteries to run the solar pump at non-sunny times, most people prefer to store the water in a holding tank. This results in the same effect - water when you need it- with less cost and less complexity.
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