After entering the 1970s, due to the impact of the second oil crisis, people realized objectively that: the existing energy structure must be completely changed, and the transition to the future energy structure should be accelerated. As a result, many countries, especially industrially developed countries, re-established Strengthened support for the development of solar energy and other renewable energy technologies. In the long run, photovoltaic power generation will enter the power market with distributed power sources and partially replace conventional energy sources. In the short term, photovoltaic power generation can be used as a supplement to conventional energy sources. It is of great significance to solve special application fields, such as communication, signal power supply, and civilian life demand in remote areas without electricity, as well as environmental protection and energy strategy. The advantages of photovoltaic power generation are fully reflected in the following aspects:

1. Solar energy resources are inexhaustible and inexhaustible. The solar energy irradiated on the earth is 6,000 times greater than the energy consumed by human beings. In addition, according to the calculation of the nuclear energy generated by the sun, the sun will shine on the earth for more than 60 billion years.

2. Green and environmental protection. Photovoltaic power generation itself does not require fuel, does not emit carbon dioxide, does not pollute the air, and does not generate noise.

3. Wide range of applications. Photovoltaic power generation systems can be used as long as there is sunlight.

4. Long service life, simple maintenance and high reliability. The life of crystalline silicon solar cells is as long as 20-35 years; since there are no mechanical rotating parts, the operation and maintenance are simple, and the reliability is high. manual operation.

5. The structure of the solar cell module is simple, small and light, easy to transport and install, and the construction period of the photovoltaic power generation system is short.

6. The system is easy to combine. A number of solar cell components and battery cells are combined to form a system of solar cell arrays and battery packs; inverters and controllers can also be integrated. Therefore, the photovoltaic power generation system can be large or small, easy to combine and expand .