One of the most promosing renewable energy technologies is photovoltaics. Photovoltaic's(PV) is a truly elegant means of producing electricity on site, directly from the sun, without concern for energy supply or environmental harm. These solid – state devices simply make electricity out of sunlight, silently with no maintenance, no pollution, and no depletion of materials.
There is growing consensus that distributed photovoltaic systems that provide electricity at the point of use will be the first to reach widespread commercialization. Chief among these distributed applications are PV power systems for individual buildings.