Solar Water Pump Choosing Tips for You from MASTRA

Solar-powered pumps run on electricity generated by photovoltaic panels or the radiated thermal energy 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 (ICE). Solar pumps are useful where grid electricity is unavailable and alternative sources (in particular wind) do not provide sufficient energy.

Solar powered water pumps can deliver drinking water as well as water for livestock or irrigation purposes. Solar water pumps may be especially useful in small scale or community based irrigation, as large scale irrigation requires large volumes of water that in turn require a large solar PV array. Energy storage in the form of water storage is better than energy storage in the form of batteries for solar water pumps because there is no intermediary transformation of one form of energy to another. The most common pump mechanics used are centrifugal pumps, multistage pumps, borehole pumps, and helical pumps. Important scientific concepts of fluid dynamics like pressure vs. head, pump heads, pump curves, system curves, and net suction head are really important for the successful deployment and design of solar powered pumps.

Solar pump water system is new arrival products of China Guangdong Ruirong Pump Industry Co., Ltd MASTRA, a professional manufacturer of submersible pump and sewage pump in rich experience for almost 30 years, the pump driven by a DC motor, draws water from wells or rivers, then pours water into the reservoir, storage tank or directly to irrigation systems and fountain systems. Alternating current (AC) motors are sometimes used, but they require more complex control systems. They also result in less total energy availability due to the electrical losses caused when an inverter is used to convert the DC to AC electricity. Because DC motors do not require an inverter, utilize a less complex control system, and result in more total energy availability, they are most commonly paired with solar-powered pumps. Based on the requirements and installation conditions, screw pump and multistage impeller pump can be used.

Actually, in solar pumping systems, pump selection is essential, which directly affects the economy and stability of the whole system. Submersible pumps which have widely application and speed-regulating range, are common in solar pumping systems, it can increase working time and water flow rate of the solar pumping system. If the users require low head and high water flow, can choose multistage impeller pump, while they require high head and low water flow can choose screw pumps.

Another important consideration when selecting the appropriate pump is the pump’s minimum voltage. Pump manufacturers may provide pumps with similar operating characteristics but different voltages. A higher operating voltage tends to be more efficient since there is less energy loss from the reduced current required to deliver the same power (wattage). This is important when considering the placement of the panels and controller relative to the location of the pump.

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