Photovoltaic modules are mainly composed of tempered glass---EVA---battery string---EVA---backboard---aluminum frame---junction box---connector.
Tempered glass:
1. It mainly supports the entire assembly and provides sufficient mechanical strength for the assembly, usually with a thickness of 3.2mm.
2. The tempered glass used in the solar industry requires that the iron content does not exceed 0.01%.
3. Transmittance: The light transmittance in the spectral range of 400nm-1100nm is required to be above 91%.
4. Wind pressure resistance performance: The wind pressure resistance performance is required to be greater than 2400Pa (equivalent to the wind pressure of 800Pa generated by a 12-level hurricane, and has a safety factor of 3 times).
Cell protection, waterproof, anti-ultraviolet, high light transmittance, strong impact resistance, long service life, the general thickness is 3.2mm, and the light transmittance reaches 90% in the wavelength range (320-1100nm) that the crystalline silicon solar cell responds to Above, it has a high reflectivity for infrared rays with a wavelength greater than 1200nm, and at the same time can withstand the radiation of solar ultraviolet rays.
EVA film is used for the encapsulation of solar cell modules and has the following performance characteristics:
1. High transmittance;
2. Reasonable degree of cross-linking;
3. Excellent resistance to UV aging and excellent resistance to heat and humidity;
4. Very low shrinkage rate;
5. It has strong long-term bonding performance to various backplanes and glass;
6. Higher volume resistivity.
The solar back sheet is a composite film that is laminated and bonded by multiple layers of polymer films, which protects and supports the cells, and has reliable insulation, water resistance and aging resistance.
Features: excellent weather resistance; low water vapor permeability; good electrical insulation; certain mechanical properties
Aluminum frame: protects components, connects and installs, and has strong impact strength.
Junction box: lead out the bus bars, and at the same time, by configuring bypass diodes, the influence of shadow shading and hot spots can be reduced.
Connecting the plug: connecting function
