Photovoltaic solar panels generate electricity by converting the energy radiated by the sun. As its name suggests photo means “light” and voltaic meaning “electricity”. These panels are becoming popular day by day due to their effective use. Cleaner energy sources are in great demand as a result of higher benefits they offer. The efficiency of these renewable energy sources is getting better with the advancement of technology and they are becoming more common. Solar energy has the advantage over other renewable energy sources such as domestic energy supplies.
The purchase of a new solar panel is expensive, but it is only a one time investment. But you can build one panel if you can give it some time and work patiently. The solar energy will save you money. First you need the electricity bill amount that the extra energy generated by panels back to reduce the grid by using it and secondly can you sell and get paid. You see the double benefits here. Apart from this, you are helping the environment too.
Photovoltaic solar panels are the fastest growing renewable energy in the world. The production of photovoltaic cells is constantly expanding at a rate of fifty percent every two years after 2002. The expected amount of power generated by solar panels exceed twenty thousand megawatts by the end of the year.
Photovoltaic solar panels use solar cells to generate electrical energy. Solar cells are made of semiconductor material called silicon. A portion of the light is absorbed by the semiconductor, and this energy converts it into silicon loose electrons. Photovoltaic cells have an electric field that is forced to flow through the free electrons in a certain direction. Free flow of electrons is electricity. We use this electricity for external use by placing metal contacts on the cell.
Photovoltaic solar panels are widely used for power generation in places that receive abundant sunlight. Technological advances and increasing the production scale, they have a lot cheaper since the first solar cell was made manufactured. Now they are used for energy generation in more than 100 countries. The largest solar power plant in Spain that generates a huge sixty megawatts of power. Install fans on the roofs of the houses to take advantage of the solar energy.
Nature has not given us infinite stores of traditional energy sources such as coal and petroleum. Renewables are our necessity. The ever-expanding technology it is possible to live in a greener world and enjoy the modern conveniences that we have been accustomed to.
Source: http://ezinearticles.com/?Introduction-to-Solar-Panels&id=4953488 by Tony Hodgison