photovoltaic or photo voltaicConverts light into electrical power. Any light, not only direct sun light. The current world wide production should be fast incresed.For example the 1000 W / m² standard Photovoltaic test as the one and only test proves the low knowledge about this type of solar energy. If You ask for the best Photovoltaic to deliver electric power during 2 cloudy December weeks in Germany, You will get no reasonable answer. If You ask for the best Photovoltaic to deliver electric power during 2 sunny weeks in the Sahara, You can use the 1000 W / m² standard Photovoltaic test.
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