IntroductionRS−P Solar Water Pump Controller can accept PV input, single phase 220V and three-phase 380V inputs. It uses clean solar energy that is environment friendly and unlimited. It can also be powered by emergent diesel engine or grid power, and have variable frequency and energy saving features.System componentsThe system mainly has 3 parts: power supply, controller and load. The power supply is PV (Photovoltaic) array, generator or grid. The controller is mainly the RS−P Solar Water Pump Controller. The load is 3-phase asynchronous motor or pump. The system does not need battery for storing energy, which not only cuts the cost, but also protects the environment.Operating principlesRS−P Solar Water Pump controller converts DC into adjustable 3-phase AC and can track the maximum powe...