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Structural Composition of Solar Panel

Structural composition of solar panel: tempered glass is used to protect the main body of power generation (such as battery). Its selection of light transmittance is required. 1. The light transmittance must be high (generally more than 91%); 2. Ultra white steel treatment. EVA is used to bond and fix toughened glass and power generation main body (such as battery). The quality of transparent EVA material directly affects the service life of components. EVA exposed to air is easy to age and turn yellow, which affects the light transmittance of components and the power generation quality of components. In addition to the quality of EVA itself, the lamination process of component manufacturers also has a great impact, such as the bonding degree of EVA is not up to standard, Insufficient bonding strength between EVA and tempered glass and back plate will cause early aging of EVA and affect the service life of components. The main function of solar cells is power generation. The mainstream in the main power generation market are crystalline silicon solar cells and thin-film solar cells, which have their own advantages and disadvantages. Crystalline silicon solar cells have relatively low equipment cost, but high consumption and cell cost, but also high photoelectric conversion efficiency, which is more suitable for power generation in outdoor sunlight; Thin film solar cells have relatively high equipment cost, but their consumption and battery cost are very low, but their photoelectric conversion efficiency is more than half that of crystalline silicon cells, but their weak light effect is very good. They can also generate electricity under ordinary light, such as solar cells on calculators. EVA functions as above, mainly bonding and packaging the power generation main body and the back plate, sealing, insulation and waterproof (generally TPT, TPE and other materials must be aging resistant, and most component manufacturers have a warranty of 25 years. Tempered glass and aluminum alloy are generally no problem, and the key is whether they can meet the requirements with the back plate and silica gel). Aluminum alloy protective laminate plays a certain role in sealing and supporting. The junction box protects the whole power generation system and acts as a current transfer station. In case of component short circuit, the junction box will automatically disconnect the short-circuit battery string to prevent burning the whole system. The most important thing in the junction box is the selection of diodes. The corresponding diodes are different according to the type of battery in the module. Silicone sealing function is used to seal the junction between components and aluminum alloy frame, components and junction box. Some companies use double-sided tape and foam to replace silica gel. Silica gel is widely used in China. The process is simple, convenient, easy to operate and the cost is very low.

Structural Composition of Solar Panel 1

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