1) The role of tempered glass is to protect the main body of power generation (such as solar cells). The selection of light transmission is required:
     1. The light transmittance must be high (generally above 91%);
     2. Ultra-white tempered treatment.
 
2) EVA is used to bond and fix toughened glass and solar cells. The quality of transparent EVA material directly affects the life of solar modules. EVA exposed to the air is prone to ageing and yellowing, which affects the light transmittance of the modules, thereby affecting The power generation quality of solar modules. In addition to the quality of EVA itself, the impact of the lamination process of solar module manufacturers is also very large. For example, the adhesion of EVA is not up to standard, and the bonding strength between EVA and tempered glass and backplane is not enough, which will cause EVA to age early and affect the life of solar modules. .
 
3) The main function of solar cells is to generate electricity. The mainstream in the market is crystalline silicon solar cells and thin-film solar cells. Both have their own advantages and disadvantages. Crystal silicon solar cells have relatively low equipment costs and high photoelectric conversion efficiency. They are more suitable for power generation in outdoor sunlight, but the consumption and cost of solar cells are high; thin-film solar cells have low consumption and battery costs, and low light effects Very good, it can also generate electricity under ordinary light, but the relative equipment cost is higher, and the photoelectric conversion efficiency is more than half of that of crystalline silicon cells, such as solar cells on calculators.
 
4) The role of the backplane is to seal, insulate, and waterproof (usually TPT, TPE and other materials must be resistant to aging. Most solar module manufacturers have a 25-year warranty. Tempered glass and aluminum alloy are generally okay. The key is Whether the backplane and silica gel can meet the requirements.)
 
5) The aluminum frame mainly protects the laminate, and plays a certain sealing and supporting role.
 
6) The junction box protects the entire power generation system and acts as a current transfer station. If the solar module is short-circuited, the junction box will automatically disconnect the short-circuit solar cell string to prevent burnout of the entire system connection. The most important thing in the junction box is the selection of diodes. According to the different types of solar cells in the solar module, the corresponding diodes are also different.
 
7) Silicone sealing function, used to seal the junction of solar modules and aluminum frame, solar modules and junction box. Some companies use double-sided tape and foam instead of silica gel. Silicone is widely used in China, which is simple, convenient, easy to operate and low cost.