Solar Water Pump :- A solar water pumping system is capable of running all types of electrical water pumps with applications varying from irrigation to household demands. Irrigation pumps such as submersible, surface or deep well can also be coupled with drip irrigation systems to enhance the returns from this configuration.

A solar powered pumps runs on electricity generated by photo voltaic panels available from collected sunlight as opposed to grid electricity or diesel run water pumps. The operation of solar powered pumps is more economical mainly due to the lower operation and maintenance costs and has less environmental impact than pumps powered by an internal combustion engine(IEC). Solar pumps are useful where grid electricity is unavailable and alternative sources do not provide sufficient energy.

A Photovoltaic solar powered DC submersible pump system has 3 Parts:-

Submersible Pump.

Controller.

Solar Panels.

The size of the PV- System is directly dependent on the size of the pump, the amount of water that is required and solar irradiance available.
The purpose of controller is twofold. Firstly, it matches the output power that the pump receives with the input power available from the solar panels. Secondely, it provides a low voltage protection, whereby the system is switched if the voltage is too low or too high for the operating voltage range of the pump. This increase the lifetime of the pump thus reducing the need for maintenance. Direct current motors are used for small to medium applications up to about 7.5 kW rating. Solar powered pump is used with an inverter, that changes the direct current from the solar panels into alternating voltage & current for inverters.