Photovoltaic production has been doubling every 2 years, increasing by an average of 48 percent each year since 2002, making it the world’s fastest Energy growing technology. At the end of 2008, the cumulative global PV installations reached 15,200 megawatts. Roughly 90% of this generating capacity consists of grid-tied electrical systems.

Photovoltaic (PV) are arrays of cells containing a solar photovoltaic material that converts solar radiation being absorbed by the panel directly into DC electricity. Materials presently used for photovoltaic include Monocrystalline silicon, Polycrystalline silicon, Amorphous silicon or Cadmium Telluride (CdTe), and Copper Indium Gallium Selenide (CIGS) etc.

Due to the growing demand for renewable energy sources, the manufacture of solar cells and photovoltaic arrays has advanced dramatically in recent years.