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System lay-out
The solar pump system consists of solar panels on a mounting structure, a pomp controller, an electric pump and a storage tank for water.
The big advantage of the solar pump is that there is no battery necessary to back-up the solar power. The pump is connected to solar panels, so water is pumped from low to high level in case the sun shines. The water is buffered in the tank that is mounted at a higher level than the taps. In this way there is pressure on the taps and there is water available if the sun is not shining. The function of the water tank is comparable to the function of the battery.
To obtain a good match between solar panels and the pump, the pump controller is connected in between. This controller makes the solar pump a unique product. Not any other pump can be used, on the contrary! The controller converts the direct curent from the solar panels into alternating current with a frequency that depends to the irradiation. At low irradiation, eg. in the morning at sunrise, the pump will be driven by a slowly rotating engine. The speed of rotation will increase when the sun rises in the course of the day.
A simple float switch will switch off the pump if the water level is high enough. If the water level will go down and the sun shines, the pump will be switched on again. If the float switch does not function well, the solar pump system can be used as a shower (below).
