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Solar powered pumps

890 bytes added, 18:09, 8 May 2012

→‎Construction, operations and maintenance

==Construction, operations and maintenance==

[[Image:SolarPumpDiagram.jpg|thumb|right|250px| Solar pumping system diagram. <br>Photo: UNICEF.]]

Solar panels are a very reliable piece of equipment and many manufacturers sell the panels with a guarantee of 25 years. It should be noted that such a warranty can only be honoured if the supplier is still in business in 25 years. Therefore, it is advisable to select reliable suppliers rather than to choose the cheapest source.

Solar PV modules are normally specified by Watt-peak. Wattpeak or Wp is the measure of power output of photovoltaic solar energy. They are very costly pieces of equipment. A 50 Wp module costs several hundred dollars and has a good resale value in many countries. Theft is already a problem in some areas.

There are three main types of cells on the market: monocrystalline silicon, multi-crystalline silicon, and amorphous silicon. New, non-silicon types such as cadmium telluride (CdTe) and copper indium disellenide (CIS) have recently become available.

==Costs==

Winona

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