Solar or solar energy (solar panels) is the energy of the Sun, its light and heat that people have been using since ancient times with the help of various technologies. Solar radiation, along with secondary solar sources such as wind, wave energy and biomass, are counted among the most commonly available renewable energy sources on Earth. Only a small fraction of the solar energy of that available is used.

Solar or solar energy is the energy of the Sun, its light and heat that people have been using since ancient times with the help of various technologies. Solar radiation, along with secondary solar sources such as wind, wave energy and biomass, are counted among the most commonly available renewable energy sources on Earth. Only a small fraction of the solar energy used is available. Solar energy provides electricity using heat engines or photovoltaic systems. Once converted, its use is limited to human ingenuity. The partial list of the solar system includes space for heating and cooling through solar architecture, drinking water through distillation and disinfection, thermal energy for cooking and high temperature heat processes for industrial purposes.