Typically, diesel-powered pumps are used in areas where connecting to the electricity grid is difficult. Solar photovoltaic (PV) systems can be an attractive complementary energy source deployed alongside diesel pumps in areas with plenty of sunshine and where the cost to run power lines is high.
Photovoltaic systems have the benefit of being scalable, with capacity ranging from a few watts for applications such as automated farm gates or timers, to hundreds of kilowatts for the homestead and farm sheds. Rather than having one large centralised system, a number of distributed PV systems can be deployed at pump sites.
The family of solar submersible pumping systems ranges from 150W to 25kW, more than meeting the requirements of many irrigation, livestock and fish farming, and water supply applications.