Solar water pumps are like conventional water pumps except that they are run on Solar energy. It can be a completely independent system without any other source or can be backed by another source like a grid.
Solar Water Pumps are systems that pump water from a water source depending on the intensity of sunlight falling on the solar panels. In this system, the light falling on the solar panels gets converted to electricity and in turn, this electricity runs a motor to pump water from a water body. With the increase in the intensity of the sunlight during daytime, the amount of electricity produced also increases. This in-turn increases the output of the water pump.
The major differentiating factor about the solar water pumps from the other solar PV systems is that this does not necessarily require another source of power(grid connection or battery back-up) for its operation.