Also abbreviated as “PV”, the word photovoltaic is derived from the words “photo” from the Greek meaning light and “voltaic” meaning voltage. The term is used to describe a process known as the “photovoltaic effect” the process by which some materials convert sunlight into electricity. PV cells are composed of silicon which is placed under a thin sheet of glass. Sunlight in the form of photons strike the PV cells, exciting electrons in the silicon. An electric current is generated when the electrons are collected by wiring that is incorporated into the PV cells. PV cells are also known as solar cells.
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