In the past, all TPT was used. It has stood the test of time and shows virtually no aging or discoloration in 10 to 20 years. In recent years, TPE and PET have been used for a short time and no one can guarantee that they will last 20 years. It is better to use TPT for power plants, which is guaranteed. If the price does not allow street lights and home systems, other materials can be used. If the price allows it, TPT is guaranteed.
The internal structure of the solar panel and the materials of each component
1. Glass: Ultra-white textured tempered glass, thickness 3.2mm, within the wavelength range of the spectral response of the solar cell. The internal light transmittance (320-1100 nm) reaches more than 91%.
It is resistant to ultraviolet radiation and the light transmittance does not decrease. Tempered glass components can withstand the impact ofa ball of ice with a diameter of 25 mm at a speed of 23 meters/second.
2. EVA: A layer of high-quality EVA film with a thickness of 0.5mm is used as a sealant for solar cells and as a bonding agent with glass and TPT. It has high light transmittance and anti-aging ability.
Performance requirements after curing of EVA film for solar cell packaging:
Light transmission above 90%; degree of crosslinking greater than 65-85%; cm), glass/film is greater than 30; TPT/film is greater than 15; Temperature resistance: high temperature 85℃, low temperature -40℃. ,
3. TPT: The back side of solar cells has basic requirements such as aging resistance, corrosion resistance, ultraviolet ray resistance and airtightness.
4. Frame: The aluminum alloy frame used has high strength and stronge resistance to mechanical shock.
Laminated glass solar panels: tempered glass, solar cells, EVA film, TPT back film, aluminum alloy frame, silicone, junction box, tin-plated soldering tape
PET laminated solar panels: PCB base plate, solar cells, EVA film, PET film, tin-plated solder tape
Epoxy solar panels: PCB base plate, solar cells, AB transparent resin glue , protective film, tin-plated soldering tape