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Solar Energy & Diesel Engine Tubewell in Pakistan http://www.cityhomesolar.com/solar-pumps-in-pakistan/ pumping system includes three main components: the solar panel, either fixed or designed to track the sun,s movement controllers protect the pump. Electronic controllers protect the pump and produce more water in low-light situations. These electric controllers protect pumps operating on full voltage, low amperage in low light conditions by trading voltage for amperage. The electronic controller also shuts off the pump when a water float indicates the tank is full or water level has dropped to a pre-selected level to protect against pumping the pump dry solar pump is pakistan,