Photovoltaic connectors cannot be ignored

With the widespread use of solar power stations, international standard MC4/H4 connectors are widely used for the connection of solar power generation components and component strings, and the DC power supply terminal connections of DC panels, variable frequency power supplies and other equipment.

So what are the performance requirements for photovoltaic connectors?

First, the photovoltaic connector must have high conductivity and the loop resistance must not be greater than 0.35 milliohms.

Second, it must have sufficient safety performance to ensure the safety performance of solar photovoltaic panel components. The environment and climate in which photovoltaic power generation systems are used are sometimes very harsh. Therefore, they require waterproofing, high temperature resistance, corrosion resistance, high insulation layer performance and other properties. The waterproof level needs to reach IP68.

Third, the structure of the solar power station connector must be strong and reliable, and the connection force of the male and female connectors of the appropriate connector should not be less than 80N. For connecting 4mm² cable MC4 connector, under the condition of carrying 39A current value, the temperature shall not exceed the limit temperature of 105 degrees. The MC4/H4 connector is a single-core connector with male and female connectors. It has many advantages such as simple structure, convenient and quick connection of light wires, and convenient inspection and maintenance.

Precautions for installing photovoltaic connectors. When selecting connectors, attention should be paid to product quality, including compliance with the specifications of the internal structure of the metal conductor. The thickness of the raw materials and tough coating must meet the heavy current carrying capacity and good contact. The plastic of the connector shell must ensure that the surface is smooth and crack-free. , the jack sealing is high quality. Component connectors must be protected from sunlight and rain during installation to avoid aging of the connectors, corrosion of internal structural connectors, and cables, increasing loop resistance, and even sparking, which may lead to reduced efficiency or even safety accidents. When assembling photovoltaic connectors, the crimping process is very important, and professional crimping tools should be used. Before the construction of the photovoltaic power station, the installation personnel of the relevant projects should be trained on the crimping operation.