No matter how the photovoltaic junction box changes, solar junction box its basic structure remains the same, including box body, box cover, connector, terminal block, diode, solar junction box etc. Some junction box manufacturers have designed heat sinks to enhance the temperature distribution in Hanoi, solar junction box and some junction box manufacturers have made other detailed designs, but the overall structure has not changed. The box body is the main part of the junction box, solar junction box with built-in wiring terminals and diodes, external connectors and box cover, is the frame part of the junction box, solar junction box and bears most of the weather resistance requirements.
The box cover plays the role of sealing the box body, waterproof, solar junction box dustproof and pollution-proof. The tightness is mainly reflected in the built-in rubber sealing ring, solar junction box which prevents air and moisture from entering the junction box. The connector connects the terminal and external electrical equipment such as inverter, controller, solar junction box etc. The connector is made of PC (polycarbonate), but PC is easily corroded by many substances. The aging of the junction box is mainly reflected in the easy corrosion of the connector, solar junction box and the low temperature impact of the plastic nut is easy to crack. Therefore, solar junction box the service life of the junction box is reflected in the life of the connector.
There are 2, 3, 4, 5, 6 and other specifications for the terminal connection component lead wires and connectors. The width of the terminal itself is 2.5, 4, 6mm depending on the lead wire. The junction boxes and terminals of different manufacturers The spacing is also different. The diode in the diode photovoltaic junction box is used as a bypass diode to prevent the hot spot effect and protect the components. When the component is working normally, solar junction box the bypass diode is in the cut-off state, and then there is a reverse current, that is, a dark current, solar junction box which is generally less than 0.2 microampere. Dark current reduces the current generated by the component, solar junction box albeit by a small amount.