There exist plenty of different technologies of photovoltaics, such as polycrystalline silicon and amorphous cells. It is still unknown which of all the categories will be the most favored choice. Solar cells were limited until the 1970′s due to the high cost.

Another drawback has been the high cost of installation, which also has been decreasing over the recent years.
Photovoltaics are used to convert sunlight in to electricity, also the use of lenses or mirrors can be used to concentrate sunlight along with a tracking method to generate the sunlight in to a small beam. Conversion with Photovoltaics is done by the Photoelectric effect. Solar energy has great potential, but does not supply much of the world’s needs.

PHOTOVOLTAICS

This solar cell converts the light energy in to electric current through the photoelectric effect. Solar cells have been in use since the 1880″s, the early types used selenide than copper oxide, which did not convert as much sunlight in to electric current.The early cells were not efficient and expensive, but led to the research of where they are today.

CONCENTRATING SOLAR POWER

The lenses or mirrors along with the tracking method are used to focus sunlight in to a small beam.
There’s several types of mirrors and lenses used, but all are used to heat up liquid, which is used for power generation or storage.

ENERGY STORAGE
Concentrating solar energy is not a sort usually used in a home surroundings, so they will discuss photovoltaic cell storage. Rechargeable batteries are the most common source of storage. With the use of a grid tied method the excess electricity can return to the
transmission grid for a credit on what you do not use. Normally the credits roll over from month to month with an annual surplus settlement.