Aluminum frame for photovoltaic modules: used to protect the edges of photovoltaic glass, enhance the sealing performance of modules, and improve the mechanical strength of modules. It is one of the important auxiliary materials, with a cost angle frame accounting for 9% and a weight angle frame accounting for 8.9%. About 96% of the border materials are made of aluminum profiles, fiberglass composites, stainless steel, rubber, etc., which are used in a few specific scenarios.