Photovoltaic solar energy photovoltaic effect is a physical process through what the photovoltaic cell turns the solar light into electricity. The solar light is compound of photons.When the photons hit the photovoltaic cell and are absorbed by this one, they generate electricity. This it happens because the energy of the photon is transferred to the atomic electron of the photovoltaic cell (material semi conductor).The photovoltaic cells can be made with different materials and technologies. Some of these technologies, used in the most commercial modules, include monocrystalline, polycrystalline and amorphous silicon cells. Using this technology each cell produces a tension in DC of approximately 0,5 volts and one intensity in DC from 1 to 8 To, requires an appreciable amount of cells to produce an appreciable voltage and a power.
The photovoltaic cells are interconnected to each other in series in groups that go of 36 to 72 cells that they produce a voltage to abierto circuit of approximately 20 to 40 volts this set of cells conform a photovoltaic module. Solar water pumps the solar pumps are designed to work in direct current provided by a photovoltaic adjustment. Due to the nature of the solar energy east type of systems must take advantage of the solar energy to the maximum, need to maximize the liters of electrical water pumped by watt consumed. Also they must of being able to pump water during periods of low insolation. Submersible and superficial solar pumps exist. The superficial solar pumps are placed near the water source, are much more economic that the submersible pumps, pump little water per day, they are in centrifugal models and of positive displacement (diaphragm). The submersible pumps are introduced within the water source, are made in stainless steel, they allow to pump great amounts of water to little height, or little amount of water to high altitude, for example: a pump centrifuge multi steps it can pump 100.000 liters of water to the day to 10 meters of height, a pump of positive displacement (rotor helical) can pump to 200 meters of height 5.000 liters per day.