Solar energy is the free green energy obtained from the sunlight every day. Solar photovoltaic modules convert solar energy into electrical energy during the day. Components and functions of solar panels:
Surface material (select one of the following):
Pet: English Name: polyethylene terephthalate, pet for short. It is divided into frosting and bright light. It is located at the outermost layer of the solar panel. It is mainly used to protect the solar cell and high transmittance to ensure the power generation of the solar panel.
ETFE: the English name is ethylene tetra fluoro ethylene, abbreviated as ETFE, tetrafluoroethylene copolymer. Its laminated surface is uneven, and its service life is longer than that of pet, but shorter than that of glass. The function is the same.
Glass: it is the outermost layer of the solar panel. It must be solid and have good light transmission to obtain better performance of the panel. The main function of toughened glass is to protect solar cells from bad weather, dirt and dust.
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EVA: EVA sheet or “vinyl acetate” is used to bond and encapsulate the battery sheet and surface material layer. It should be durable and can withstand extreme temperature and humidity.
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Solar cell: an important part of solar cell panels. Solar cells are strung together to make solar cell panels, including welding, packaging, installing them on metal frames, testing, etc. the efficiency of solar cell panels is directly proportional to the efficiency of solar cells. The cost and efficiency of solar cells affect the overall performance of solar panels.
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EVA: EVA sheet or “vinyl acetate” is used to bond and encapsulate the battery sheet and the back material layer. It should be durable and can withstand extreme temperature and humidity.
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Back material (select one of the following):
Pet: the last layer of the panel, providing mechanical protection and electrical insulation. It is essentially a protective layer.
PCB: the last layer of the panel, providing mechanical protection and electrical insulation. It is essentially a protective layer. There is also a circuit part on it.
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Frame: the aluminum frame is also a key component because it provides structural strength for the panel. It is recommended to use frames made of strong but lightweight materials. It should be hard and able to withstand extreme conditions such as strong winds and external forces. Another is at the four corners of the protective glass plate, which will not cause the whole piece to break in case of collision.
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Junction box: the junction box is fixed on the back of the panel. It is the central point where the wires are interconnected with the solar panel. Protect the wiring of the solar panel from water and play a waterproof role.
The above is an important part of the solar panel: surface material + EVA + Battery + EVA + back material = solar panel. If you want to know more about solar panels, please follow us.