What are Photovoltaics?

 

Think of it as solar electricity. The term "photovoltaic" is derived from the words photo, meaning "light" and volt, meaning "electricity". Photovoltaic cells are silicon semi-conductor devices that convert sunlight into energy. The cells are mounted in flat panels known as modules, the building blocks of the photovoltaic system.

An array of interconnected modules is used to "collect" sunlight. The resultant energy is conducted through wires as electricity and is used to power a motor, lamp, or other electricity-consuming units. Extra electrical energy may be stored in batteries and used later as a "stand-alone" system, or connected to a grid for sale to public or private utilities.

Photovoltaic power is clean, economical, and ecologically sound. Originally photovoltaic cells were designed for use in spacecraft. Today, photovoltaic technology makes possible  a range of applications - providing power to far away mountain top relay stations, to utility systems, commercial and industrial buildings and homes;  and for everyday products such as calculators and watches.