Solar panels, also called photovoltaic modules, are composed of the following parts:
1) Tempered glass is used to protect the main power generating body (such as cells), and its selection is required for light transmission. 1. Light transmittance should be high (generally above 91%). 2. Ultra-white tempered treatment
2) EVA is used to bond and fix the tempered glass and the main body; energy production (such as battery cells). The advantages of transparent EVA material are: Defects directly affect the life of the component. EVA exposed to air is prone to aging and yellowing, thereby affecting the light transmission of the component and therefore. affecting the power production quality of the component. In addition to the quality of the EVA itself, the component manufacturer's lamination process also has an imBearing if the bonding degree of the EVA is not up to standard and the bonding strength between the EVA, the tempered glass and the backplane are insufficient, it will cause premature aging of the EVA and affect the lifespan of components.
3) The main function of cells is to produce electricity. The main market for power generation is crystalline silicon solar cells and thin-film solar cells, both of which have their own advantages and disadvantages. Crystalline silicon solar cells have relatively low equipment costs, but the consumption and costs of the cells are high, but the photoelectric conversion efficiency is also high, which makes them suitable for power generation under the outdoor sunlight. Thin-film solar cells have relatively high equipment costs, but the equipment costs are relativelystudents. battery consumption and costs are high. The cost is very low, but the photoelectric conversion efficiency is more than half of that of crystalline silicon cells, but the low light effect is very good, and can also generate electricity under ordinary light, such as For example. solar cells on calculators.
4) The EVA works as above, mainly bonding and encapsulating the main body of the power generation and the backplane
5) The function of the backplane basket is sealing, insulation and waterproofing. (usually TPT, TPE and other materials should be used) Aging resistance, most component manufacturers have a 25-year warranty. Tempered glass and aluminum alloy generally pose no problem. The key is the ability of the backplane and silicone to meet the requirements. /p>
6) Stratificationone protective in aluminum alloy. It plays a certain sealing and supporting role
7) The junction box protects the entire power generation system and acts as a current transfer station if the component. is shorted, the junction box automatically disconnects the shorted battery string to prevent the entire system from shutting down. The most critical thing in the junction box is the diode selection. Depending on the type of cells in the module, the corresponding diodes are also different.
8) The silicone sealing function is used to seal the module and the module. Aluminum alloy frame, module and junction box junction. Some companies use double-sided tape and foam to replace silica gel. The process is simple, practical, easy to use and the cost is very low.