The Solar Panel Junction Box, an indispensable component in the solar cell module, plays an important role in connecting the solar cell array and the charging control device. It not only integrates the cross-domain knowledge of electrical design, mechanical design and material science, but also provides users with an efficient solar panel combination connection solution. Its main function is to smoothly export the electricity generated by the solar cell module through the cable. At the same time, its built-in diode design more effectively prevents the risk of hot spots in the photovoltaic module.
The junction box of the photovoltaic half-cell module, located on the back of the module, is a key component connecting the solar cell array and the charging control device. It not only has the function of smoothly exporting the electricity generated by the solar cell module, but also integrates the multi-domain knowledge of electrical, mechanical and material science to provide users with an efficient solar panel combination connection solution. In addition, its built-in diode design further prevents the risk of hot spots in the photovoltaic module and ensures the safe and stable operation of the system.
As a key connector in the photovoltaic half-cell module, the Solar Panel Junction Box plays a bridging role, closely connecting the solar module with the inverter and other control devices. Its internal structure is delicate, and through the wiring terminals and connectors, it can efficiently and smoothly lead out the current generated by the solar panels and introduce it into the electrical equipment. In order to ensure that the power loss of the components is minimized, the conductive material selected for the junction box must have low resistance characteristics, and at the same time, its contact resistance with the busbar lead-out wire must be as small as possible.
The Solar Panel Junction Box not only plays the role of a connector in the photovoltaic half-cell module, but also has a protective function. It prevents the hot spot effect through the bypass diode, thereby effectively protecting the cells and components from damage. In addition, the Solar Panel Junction Box is also sealed with special materials to enhance its waterproof and fireproof capabilities. At the same time, its unique heat dissipation design is designed to reduce the operating temperature of the junction box, thereby reducing the temperature of the bypass diode, and ultimately reducing the loss of leakage current to the component power.
Weather resistance refers to the ability of materials such as coatings, plastics, rubber products, etc. to withstand damage from comprehensive factors such as light, hot and cold changes, wind and rain erosion, and bacteria in outdoor environments. The exposed parts of the Solar Panel Junction Box, including the box body, box cover and connector, are made of materials with excellent weather resistance. The current mainstream materials are PPO (polyphenylene ether) and PPE (polypropylene). These two general engineering plastics are not only rigid and heat-resistant, but also flame-retardant, wear-resistant, non-toxic and pollution-resistant. At the same time, they have small dielectric constants, high strength and excellent electrical properties. In particular, polyphenylene ether is highly respected for its wear resistance, non-toxicity and pollution resistance.
The Solar Panel Junction Box needs to cope with various harsh working environments, such as the heat in tropical areas, the low temperature in high altitude or high latitude areas, and the desert areas with a large temperature difference between day and night. Therefore, it must have good high and low temperature resistance. In addition, flame retardancy is also one of the indispensable safety features of the junction box.
The box cover plays a vital role in the Solar Panel Junction Box. It is responsible for sealing the box body and effectively resisting the intrusion of moisture, dust and pollutants. This function is mainly due to its built-in rubber sealing ring, which is designed to prevent air and moisture from entering the interior of the junction box, ensuring that the interior is dry and clean.
