The PV power generation system is mainly composed of solar cells, energy storage batteries, controllers and inverters. Solar cell components and energy storage batteries are power systems, controllers and inverters are control and protection systems, and loads are terminals.

　　The solar cell is a key part of the PV power generation system, and its quality and cost will directly determine the quality and cost of the entire system. Solar cells are low-cost polycrystalline silicon cells, but their service life is shorter than that of monocrystalline silicon solar cells.

　　PV power generation has many unique advantages:

　　1. Solar energy is an inexhaustible and inexhaustible clean energy, safe and reliable, and not affected by the energy crisis and unstable factors in the fuel market.

　　2. It is especially suitable for remote areas without electricity, and it will reduce the construction of long-distance power grids and the power loss on transmission lines.

　　3. No fuel is required, which greatly reduces operating costs.

　　4. Not easy to damage, relatively easy to install and simple to maintain.

　　5. It will not produce any waste, and will not produce noise, greenhouses and toxic gases. It is an ideal clean energy. Installing a 1KW PV power generation system can reduce CO2 x 2600～2300kg, NO x 16kg, SO x 9kg and 0.6kg of other particles every year.

　　6. The roof and walls of the building can be effectively used, without occupying a lot of land, and the temperature of the walls and roof can be reduced, and the load of indoor air conditioning can be reduced.

　　7. The construction period is short, the service life of power generation components is long, and the power generation method is relatively flexible.

　　8. It can generate electricity near the place where the electricity is used.

　　Although there are many advantages, also disadvantages:

　　1. Geographical distribution, seasonal changes, day and night alternation will seriously affect its power generation.

　　2. The energy density is low. When used on a large scale, the occupied area will be relatively large.

　　3. The high initial investment severely restricts its wide application.

　　4. The annual power generation hours are relatively low, with an average of 1300 hours.

　　5. It is difficult to accurately predict system power generation.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, PV energy storage, UPS, data center and other industries.

　　Solar power generation system with lithium battery energy storage system is a very promising clean energy.