Composition of a solar panel

2023-06-08 | Industry Knowledge

A solar panel is a device that converts sunlight into electricity and is widely used in the field of renewable energy. This article will introduce the composition, structure and working principle of solar panels, and analyze the characteristics and selection reasons of various materials in detail.




Solar panels are mainly composed of the following components: ultra-clear photovoltaic tempered glass, EVA (epoxy vinyl alcohol resin), solar cells, PET (polyester film), junction box and aluminum frame.



Ultra-clear photovoltaic tempered glass:


Ultra-clear photovoltaic tempered glass is the surface covering layer of solar panels, with high light transmittance and excellent weather resistance. Its light transmittance is usually over 90%, which allows sunlight to enter the interior of the solar cell as much as possible. At the same time, it has high strength and impact resistance, which can protect the battery sheet from external damage.




EVA (Ethylene-vinyl acetate):


EVA is a special adhesive material used to bond solar cells to other components. Through the high-temperature heating and vacuum treatment of the lamination machine, EVA can bond the various components and provide a good seal to prevent moisture and dust from intruding into the interior of the cell. Its adhesive performance is stable and reliable, which can ensure the long-term use of the battery sheet under various environmental conditions.




Solar cells:


The solar cell is the core part of the solar panel, which is responsible for converting sunlight into electricity. Solar cells are usually made of semiconductor materials such as silicon, and their working principle is based on the photovoltaic effect. When sunlight shines on the cell, the energy of the photons excites the electrons in the cell, thereby generating an electric current. The efficiency of a solar cell depends on the choice of materials and manufacturing process.




PET (polyethylene terephthalate):


PET is a commonly used backsheet material, and white is often chosen for better reflection. It has good mechanical properties and can also protect the battery sheet. The PET backsheet can prevent the cells from being mechanically damaged by the outside world, and at the same time provide certain electrical insulation properties.




Junction Box:


The junction box is an important component on the solar panel, which is used to connect the cells with the external circuit. The junction box is usually made of materials with good high temperature and weather resistance, such as engineering plastics. Its main function is to protect connectors and wires from damage from the external environment and provide a reliable electrical connection.




Aluminum frame:


The aluminum frame is the frame structure of the solar panel, which is used to support and fix the various components. The aluminum frame has good strength and corrosion resistance, which can effectively protect the components inside the battery panel. At the same time, the aluminum frame is also conducive to the installation and fixing of solar panels.




The composition of solar panels is an organic combination of multiple materials to efficiently convert solar energy into electrical energy. Through the selection of appropriate materials and strict manufacturing process, solar panels can provide stable and reliable power output, making an important contribution to the application of renewable energy.

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