Low-voltage DC solar cables in solar photovoltaic power generation systems have different requirements for the connection of different components due to different use environments and technical requirements. The overall factors to be considered are cable insulation performance, heat resistance, and flame retardant, aging performance and Wire diameter specifications, etc. The specific requirements are as follows:
1. The connecting cable between the solar cell module and the module is generally connected directly with the connecting cable attached to the module junction box. When the length is not enough, the solar extension cable can also be used. This type of connecting cable has three specifications with a cross-sectional area of 2.5m㎡, 4.0m㎡, and 6.0m㎡. This type of connection cable uses a double insulated skin with superior protection against UV, water, ozone, acid and salt, excellent all-weather capability and abrasion resistance.
2. The connecting cable between the battery and the inverter requires the use of a multi-strand flexible wire that has passed the UL test, and it should be connected as close as possible. Choosing a short and thick cable can reduce the loss of the system, improve efficiency, and enhance reliability.
3. The connecting cables between the battery array and the controller or DC junction box also require the use of multi-strand flexible wires that have passed the UL test. The cross-sectional area specification is determined by the maximum current output of the square array.
4. The connecting cable between solar cell components and the components, the connecting cable between the storage battery and the storage battery, and the connecting cable of the AC load. Generally, the rated current of the selected cable is 1.25 times the maximum continuous working current in each cable; solar cell array For the connecting cables between the square array and the connecting cables between the storage battery (group) and the inverter, the rated current of the cables generally selected is 1.5 times the maximum continuous working current of each cable.
