Solar collectors supply us with solar energy in the form of heat, and solar or photovoltaic systems convert the solar energy into electricity with the help of solar cells. Although these solar plants work very well and supply electricity to many parts of the world, it is worthwhile to establish them only in areas with regular and abundant sunlight. Till now, only one-thousandth of the electricity consumed all over the world comes from such plants. The reason is that the sun does not always shine in many European countries and a single solar cell is not sufficient to provide adequate electricity. Research is being carried out to develop them further because the advantages are tremendous. For instance, the generation of ‘solar current’ will make a pollution-free environment.
