Renewable energy sources can be classified into five categories:
solar, wind, water, biomass, and geothermal energy. Apart from geothermal, all these energy sources are caused by the sun. Biomass is any organic substance, which retains the energy created by the sun in the process of photosynthesis. The sun sends a huge amount of energy into space. Approximately one-third of the sun’s energy coming to earth is infrared light (heat rays).
The working principle of solar panels
