The sun is like a burning fireball. Its energy comes from the thermonuclear reaction inside. The energy released per second is equivalent to the energy emitted by burning 132 million tons of standard coal. It spreads as far as 150 million away from it in the form of radiation. Kilometer of the earth. According to estimates, after loss along the way and atmospheric absorption and reflection, the energy reaching the earth's surface every year is equivalent to 35,000 times the current global energy consumption, of which only about 0.02% of the energy is absorbed by various plants, and the potential for solar energy utilization is huge. , Is the most important renewable energy for mankind.

      Photovoltaic power generation is a solid-state power generation technology that uses the photoelectric effect of semiconductors to directly convert solar energy into electrical energy. Compared with traditional power generation technology, photovoltaic power generation has no intermediate conversion process, and the form of power generation is extremely simple. The power generation process does not consume resources, emit no greenhouse gas, waste gas or waste water, and is environmentally friendly; there are no mechanical rotating parts, no mechanical wear, and no noise. Power generation does not require cooling water; power generation equipment can be installed in arid desert areas, or on city roofs and walls. It does not occupy a separate area. It has a modular structure and is of random scale. It is easy to operate, maintain and manage, and can be unattended. When on duty, maintenance costs are extremely low. Especially solar energy is inexhaustible and inexhaustible. The content of silicon resources required for photovoltaic cell manufacturing is as high as 26% in the earth's crust, and there is no problem of resource shortage or exhaustion. Photovoltaic power generation is the most promising power generation technology and an important form of solar energy utilization.