Life on earth is fueled by the light and heat from the sun. Approximately, 3850 Zettajoules (ZJ) per year is the total amount of solar energy available to the earth. The suns energy travels to the earth by way of electromagnetic radiation like radio waves but the frequency range is different. Some of this energy is absorbed as it comes thru the atmosphere. Heat and light are the primary forms of solar energy.
Solar energy has many advantages over conventional energy. The energy from the sun is free the only expense is from recovering the energy. The cost of recovering the suns energy is recovered faster than with conventional energy. The recovering units don’t have to be connected to natural gas or power grids, they stand alone. The supply of solar energy is limitless. It has no emission gases to harm the earth’s atmosphere.