Solar panels, the use of sunlight to generate electricity is inexhaustible. The inexhaustible solar panels are devices that absorb sunlight and convert solar radiation energy directly or indirectly into electrical energy through the photoelectric effect or photochemical effect. Most solar cells The important material of the board is silicon. Solar panels are more energy-saving and environmentally friendly green products. Sunlight has been shining on the earth for a long time before the civilization known to man began. Because it is the most reliable, mankind began to rely on solar energy for lighting and heat. Since solar energy is continuously available every day, the capacity of photovoltaic systems has risen the most rapidly among all renewable energy sources in recent years.
Solar cells, also known as solar chips or photovoltaic cells, are photoelectric semiconductor sheets that use sunlight to directly generate electricity. Single solar cells cannot be used directly as power sources. As a power source, several single solar cells must be connected in series, connected in parallel and tightly sealed into components.
Structure and composition:
1) Tempered glass is used to protect the main body of power generation (such as cells), and the selection of light transmission is required. 1. The light transmission must be high (generally more than 91%); 2. Ultra-white tempered treatment
2) EVA is used to bond and fix the tempered glass and the main body of power generation (such as cell). The quality of transparent EVA material directly affects the life of the module. EVA exposed to the air is easy to age and yellow, which affects the light transmittance of the module. In addition to the quality of the EVA itself, the lamination process of the module manufacturer is also very important. For example, the EVA glue connection is not up to the standard, and the bonding strength of the EVA and the tempered glass and the backplane is not enough, which will cause the EVA to be early. Aging affects the life of components.
3) The important use of solar cells is to generate electricity. The mainstream in the main power generation market is crystalline silicon solar cells and thin-film solar cells, both of which have their own advantages and disadvantages. Crystal silicon solar cells have relatively low equipment costs, but the consumption and cell costs are high, but the photoelectric conversion efficiency is also high, which is more suitable for power generation under outdoor sunlight; thin-film solar cells have relatively high equipment costs, but consume and battery The cost is very low, but the photoelectric conversion efficiency is more than half that of the crystalline silicon cell, but the low light effect is very good, and it can generate electricity under ordinary light, such as the solar cell on the calculator.
4) EVA uses the same as above, it is important to bond and encapsulate the main body and backplane of power generation
5) Backplane use, sealing, insulation, and waterproofing (usually TPT, TPE and other materials must be resistant to aging. Most component manufacturers have a 25-year warranty. Tempered glass and aluminum alloy are generally okay. The key lies in the connection with the backplane. Whether the silica gel can meet the requirements.)
6) Aluminum alloy protective laminates, for certain sealing and supporting purposes
7) The junction box protects the entire power generation system and serves as a current transfer station. If the component is short-circuited, the junction box will automatically disconnect the short-circuit battery string to prevent the entire system from being burned. The most important thing in the junction box is the selection of diodes. Depending on the type of cell in the assembly, the corresponding diodes are also different.
8) Silicone sealing is used to seal the junction between the component and the aluminum alloy frame, and the junction between the component and the junction box.
Solar panels achieve energy independence. The modular design of solar panels has no moving parts and is completely upgradeable. It is easy to install. Highly reliable, almost maintenance-free power generation system reduces air, water and land pollution, and promotes environmentally friendly clean, quiet, and reliable power generation Way.
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