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Solar Power Information Supersite
The people which sat in darkness saw great light
| "All life on earth is supported by the sun, which produces an amazing amount of energy. Only a very small percentage of this energy strikes the earth but that is still enough to provide all our needs. A nearly constant 1.36 kilowatts per square meter (the solar constant) of solar radiant power impinges on the earth's outer atmosphere. Approximately 70% of this extraterrestrial radiation makes it through our atmosphere on a clear day" - Source: http://photovoltaics.sandia.gov/docs/FAQ.html | ||
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