Photovoltaics or PV is a method by generating electrical energy from the solar power that the sun radiates into direct current energy using semiconductors or inverters.
PV uses solar panels composed of a number of solar cells containing a photovoltaic material. Materials presently used for photovoltaics include monocrystalline silicon, polycrystalline silicon,amorphous silicon, cadmium telluride, and copper indium gallium selenide/sulfide. Due to the increased demand for renewable energysources, the manufacturing of solar cells and photovoltaic arrays has advanced considerably in recent years.
Solar PV is a renewable energy source. The manufacturing of solar panels makes 90% less pollution than fossil fuels.
More than 100 countries in the world use solar power. Germany is the leader in solar energy. By the end of 2012 100 GW have been installed world wide.
The price of solar PV panels has been steadily decreasing as the demands for solar energy has been increasing.
In 2009 the Ontario Power Authority launched the MicroFit program. Since that time the cost of a 10 kW rooftop solar array has dropped to a third of it’s original price.
In 1883 Charles Fritts invented the first solar cell. This solar cell had only 1% efficiency but it was the beginning of the photovoltaic movement. In the 1950s the first flexible solar cells were used in space. Now a days PV solar panels have an efficiency from 11% to 40%.
In Ontario solar arrays can be installed on rooftops of homes, businesses and barns. Ground mount solar arrays can reach the size 18 kW. Trackers which are also ground mount systems that follow the movement of the sun in the sky.
Photovoltaic solar is renewable, clean and a wonderful way to help the environment.