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Modern day devices that convert sunlight into energy are
called photovoltaic cells or “PVs”
for short. More commonly, they're known as solar cells. Solar
photovoltaic cells are small, square shaped panel semiconductors
manufactured in thin film layers from silicon and other conductive
materials. When sunlight strikes the PV cell, chemical reactions release
electrons, generating electric current. The small current from individual
PV cells, which are installed in modules, power individual homes and
businesses, or can be plugged into the bulk electricity grid.
Unlike
conventional sources of electricity, which are a major cause of problems
like smog, acid rain and global warming, a solar system produces no air
or water pollution. Solar has zero emissions, operates silently, requires
little maintenance and is generated where it is needed - in the home, at
a factory or in an office building. Solar energy's benefits are real and
immediate - creating savings for years to come while reducing Greenhouse
Gas (GHG) emissions and helping the environment. Because they do not
produce polluting air emissions or water effluents, solar PV systems are
prime candidates for supplying electricity at locations where such
environmental impacts are unacceptable; for example, in parks and places
where preserving high levels of environmental quality is important. Due
to strong demand world-wide and technological innovations, solar PV
panels have become increasingly affordable. Solar PV systems are
upgradeable and expandable. Depending on the budget, a basic system can
be installed initially and more PV modules can be added later.
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