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Solar photovoltaics (PVs) are arrays of cells containing a material that converts solar radiation into direct current electricity. Materials presently used for photovoltaics include amorphous silicon, polycrystalline silicon, microcrystalline silicon, cadmium telluride, and copper indium selenide/sulfide.[1] Due to the growing demand for renewable energy sources, the manufacture of solar cells and photovoltaic arrays has advanced dramatically in recent years.[

Today's typical photovoltaic ("PV") solar panels and energy systems are stationary flat-plate photovoltaic panels that are seen on roof-tops of homes and commercial businesses. These photovoltaic systems are costly, covered with solar cells, and rely upon the direct illumination of sunlight on the entire surface of the PV panels. Unlike these typical PV panels, systems, "concentration photovoltaic" systems use a Fresnel lens that is located between the sun and the solar cells to focus and magnify sunlight onto the solar cells that are anywhere from 250 to 500 times smaller than the typical "one-sun" PV solar panels. concentration photovoltaic What is "Concentration Photovoltaic" or "Concentrating Photovoltaic"? Concentration PhotovoltaicConcentrating Photovoltaic