Solar power is the renewable energy that is transformed from the sunlight and heat through technological means such as solar PV (photo-voltaic) cells. There are various procedures of producing solar energy but the most common is through PV cells, which are mostly recognized as the building blocks of solar panels.
Semiconductor materials such as silicon make up (photo-voltaic) PV cells. When the sunlight hits the PV cells, some of it becomes absorbed into the semiconductor. The electrons from the semiconductor atom are loosened by the energy of the absorbed light, enhancing them to flow freely. The electrons are then forced by the electric field(s) of the PV cells to move in a certain path, generating an electrical current.
It takes less than 10 minutes for light to travel to earth even though sun is 90 million miles from the earth. This makes solar energy to be completely free source of energy as it is found in abundance. It’s estimated that about 173,000 terawatts of solar energy strikes the Earth unceasingly. This is more than 10,000 times the world’s overall energy usage.
The quality of light from solar power-driven lights is improving as technology improves. The distress over the brightness of light is no longer significant as lots of transportable solar powered lights have the option to regulate brightness levels.
Furthermore, solar energy can be used on a cloudy day though not as effective as on a sunny day, producing 10-25% of its regular capacity. Germany which acquires as much sunshine as the state of Alaska produces 31% of the Word’s renewable energy. This makes the state to be the World’s topmost solar panel installer.
The key advantage of solar energy is that it does not emit any pollutants and is one of the cleanest sources of energy. They require little maintenance, easy to install and ecologically suitable. It’s acknowledged as prospect alternative energy source as it eliminates Greenhouse effect caused by use of fossil fuels.