Solar-photovoltaic module junction box wiring steps
The junction box of solar photovoltaic module is used for centralized wiring of battery cell after connecting the internal circuits of battery cell into series and parallel circuits. It is usually installed in the rear center of the solar PV module, and its main function is to concentrate the battery current and send the electric flow to the output of the panel.
The PV000125A solar photovoltaic junction box usually includes the following parts:
Box: The enclosure of the junction box, usually made of a waterproof material, which is used to prevent water from entering the back of the PV panel from the junction box.
Cable: Used for current transmission between junction box and inverter or other electrical equipment.
Diode: Installed in the junction box, it is used to prevent the battery pack from discharging in reverse at night or on cloudy days, and ensure the stability and safety of the output voltage of the photovoltaic panel.
Fuse: Installed in the junction box, it is used to prevent short circuit caused by overheating or malfunction of solar PV module.
Connector: for the connection between the cable on the photovoltaic panel and the inverter, the plug connector with high reliability and easy insertion is usually selected.
In addition to serving as a power transmission and protection device, the PV000125A PV module junction box helps to manage the PV system and improve efficiency and production. For example, by installing temperature sensors and monitoring devices on junction boxes, it is possible to better understand the working status of PV modules, diagnose the causes of inefficiency or damage of PV modules, and then optimize management.
The wiring of the junction box of the PV000125A solar photovoltaic module needs to be carried out according to the standard steps to ensure the safety and reliability of the system. The junction box usually has terminals for the positive and negative electrodes of the battery, and one end of the cable is connected to the solar PV module.
Specific wiring steps are as follows:
1. Lead the positive and negative ends of the solar photovoltaic panel out of the cable. Here we need to pay attention to the difference between each color silk. Usually the anode is red and the cathode is black.
2. After securing the cable to the end of the assembly with a cable clamp, introduce the wire into the junction box.
3. Connect the line according to the sign on the junction box. When wiring, pay attention to the connection between anode and anode, cathode and cathode.
4. Connect the battery in series or parallel with the connecting wire in the battery.
5. Connect the connection wire centrally in the junction box, connect the diode with the fuse, and complete the connection of the junction box of the photovoltaic module.
It should be noted that during the wiring process, the circuit must remain disconnected to ensure safety. After the junction box is connected, the junction box should be closed and waterproof. In addition, field tests should be carried out to ensure correct and stable circuit connections.
In order to ensure safe use, the junction box with reliable quality and good safety performance must be selected, and the installation requirements of the junction box and relevant electrical safety specifications must be strictly observed.
In conclusion, due to the existence of photovoltaic battery packs, good connection wiring can ensure power output and electrical safety, effectively improve the operation efficiency of battery packs, and reduce the risk of system failures.
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