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Thursday, December 22, 2011 8:12:54 AM
The Solar Potential
Every day, the sun delivers energy to the earth free of charge. People can use this free energy thanks to a technology called photovoltaics, which converts the sun’s energy into electricity. Photovoltaics is potentially unlimited electrical energy from the Sun.
There is more than enough solar radiation available around the world to satisfy a vastly increased demand for energy. The total amount of energy irradiated from the sun to the earth’s surface is enough to provide for annual global energy consumption 10,000 times over. If all this electricity were to be generated by means of PV systems with a modest average electricity output of 100kWh (electrical) per square metre per year, a total solar capture area of 150 x 150 km would be required. A large part of this capture area could be situated on roofs and walls of buildings, and would not therefore occupy extra land area.
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