advantage
1) Reliable operation: It can supply power normally even in harsh environments and weather conditions. 
2) Long life: The life of crystalline silicon components is usually more than 25 years, and the life of amorphous silicon components is usually more than 20 years. 
3) Low maintenance cost: After completion, only a small number of staff are required to conduct regular inspection and maintenance of the system. Compared with conventional power stations, the maintenance cost is very high. 
4), natural energy: energy is inexhaustible solar energy, no energy costs. 
5) No noise pollution: the whole system has no mechanical moving parts and no noise. 
6) Modularization: Select the system capacity according to the needs, flexible and convenient installation, and easy expansion. 
7) Safety: There are no flammable items in the system, and the safety performance is high. 
8) Independent power supply: it can run off-grid and provide independent power supply without being affected by the public power grid. 
9) Distributed power generation: decentralized photovoltaic power plants can be built to reduce the impact and harm on the public power grid. 
10) High altitude performance: In areas with high altitude and strong sunshine, the output power of the system can be increased. (Compared with photovoltaic power generation in high-altitude areas, due to low air pressure, the efficiency of diesel generators is reduced and the output power is reduced.) 
shortcoming
1) High initial investment cost: Due to the high initial investment, it is necessary to conduct an economic evaluation of a single system and a comparison of various schemes. If the initial investment is reduced and conventional fuel costs rise, photovoltaic systems will be more competitive. 
2) Unstable sunshine: Weather has a great influence on the power output of any solar system. As climate or site conditions change, the system design changes as well. 
3) Energy storage device (independent system) is required: the photovoltaic power generation system cannot generate electricity at night without sunlight, and battery energy storage equipment needs to be added, thereby increasing the system scale, cost and maintenance workload. 
4) Efficiency needs to be improved: starting from the effectiveness of investment, it is required to use photovoltaic system resources efficiently. Users must use high-efficiency load equipment. 
5) Technical training is required: The photovoltaic system uses many new technologies that people are not familiar with. Therefore, users need to undergo technical training before operating the photovoltaic system.