The energy of solar energy comes from celestial bodies outside the Earth (mainly solar energy), which is the enormous energy released by the fusion of hydrogen nuclei in the sun at ultra-high temperatures. The vast majority of human energy needs come directly or indirectly from the sun. The coal, oil, natural gas and other fossil fuels that we need in our lives are all because various plants convert solar energy into Chemical energy through photosynthesis and store them in plants, and then form them from animals and plants buried underground through a long Geologic time scale. In addition, water energy, wind energy, Wave power, Marine current power energy, etc. are also converted from solar energy.

New energy must meet two conditions simultaneously: firstly, it has abundant reserves and will not be depleted; The second is safety and cleanliness, which will not threaten humanity or damage the environment. There are two main types of new energy found, solar energy and fuel cells.

In the 21st century, solar energy will become one of the main energy sources in the world, which is the most primitive energy. Almost all other energy sources on the earth come from solar energy directly or indirectly. Solar energy is the energy generated by the continuous Nuclear fusion reaction process of sunspots inside or on the surface of the sun. Solar energy has the advantages of abundant resources, long lifespan, wide distribution, safety, cleanliness, and reliable technology. As solar energy can be converted into a variety of other forms of energy, it has a very wide range of applications. In terms of heat utilization, there are solar greenhouses, goods drying, Solar cooker, solar water heaters, etc. After years of development, solar power generation has also made significant progress.