What are the core technologies of PV connectors?

I. What are the core technologies of PV connectors? PV systems are exposed to the elements, hot sun and extreme temperature changes for long periods of time, and connectors must be able to adapt to these harsh environments. They must be waterproof, heat and UV resistant, as well as have tactile protection, high current-carrying capacity and high efficiency. Low contact resistance is also an important consideration. All of these must also be available throughout the life cycle of the PV system, at least 25 years. (1) Shell insulation materials PV connectors are generally used in very harsh environments. Shell insulation materials are weather resistant, heat resistant, flame retardant, mechanical properties, insulation properties and other aspects of the performance of the copper core in order to use for 25 years, to ensure that the copper core and the external insulation. (2) sealed PV connector is inserted inside the copper core and the copper core of the cable, which itself has no anticorrosion function, the connector is required to keep the copper core isolated from the outside world, the board connector is still with the inverter (or controller) together. Therefore, it is necessary to ensure the sealing function of the inverter, so the sealing function of the connector should also be very reliable. In addition, the sealing screws should be tightened during installation. (3) Contact resistance According to the latest international standard IEC62852 on photovoltaic connectors, the contact resistance after insertion into the convex and concave body should not be greater than 5mΩ or the final resistance value is less than 150% of the initial value. When using high-quality photovoltaic connectors, the power consumed by the connector is less than 1/10,000 of the total power of the system, and the power consumed by poor-quality connectors is more than 30 times that of high-quality connectors.

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