Compared with the ground solar power station, the roof solar power generation system has the following main advantages:

　　(1) Utilize the idle roofs of existing buildings, do not occupy special land area, and there are a large number of buildings that meet the construction conditions, which can be promoted and applied on a large scale.

　　(2) The cost of construction and renovation is lower. There are many types of PV modules available.

　　(3) Most of them are located in cities and towns, with good grid connection conditions and lower access system costs.

　　(4) The PV module installation method is relatively free, the system efficiency is high, and a large-scale installation can be realized.

　　(5) Convenient maintenance, unattended operation can be realized.

　　Compared with other forms of PV power generation, rooftop solar PV power generation system has outstanding advantages, especially suitable for large-scale promotion and application in areas where industry and commerce are developed and lack of space for development and utilization.

　　According to the actual project, the conventional roof can be divided into concrete roof, tile roof and color steel roof.

       A: Concrete roof

　　The conventional load margin of the concrete roof is relatively large. In order to obtain the maximum power generation, a bracket is conventionally used to make a certain inclination, and the solar modules are fixed on the bracket.

　　This is not only to consider the snow load of the components and the area, but also to consider the impact of wind on the components. The current popular design is to set concrete blocks at the bottom of the support to increase its own weight to resist wind.

　　B: Tile roof

　　The roofs of many independent houses are mostly tile roofs, which have a certain slope and consider drainage problems, so they cannot be used in the form of brackets. Therefore, on tile roofs, solar modules are generally laid flat along the slope of the roof. The tiles cannot fix the components, and the components need to be fixed on the inner layer of the roof with special fixing pieces.

　　C: Steel roof

　　Because of the small bearing capacity of steel roof, it is necessary to consider whether the original roof load can meet the design requirements. Lightweight is the key point for arranging solar modules on the steel roof. In order to reduce weight, brackets are generally not used, and the components are directly fixed with clamps, eliminating the need for a bracket system at the bottom, and at the same time, it will not damage the color steel roof.

　　The roof solar power generation system should pay special attention to the waterproofing of the roof, the load (including wind pressure, snow load, etc.), and the installation of the components can’t damage the original roof and other issues.

　　Lithium-ion battery (LIB) has sbecome 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.