The cables used in the low-voltage DC transmission part of solar photovoltaic power generation have different requirements for the connection of different components because of different use and technical requirements. The overall factors to be considered are: cable insulation performance, heat resistance and flame retardancy, and aging. Performance and wire diameter specifications, etc. Specific requirements are as follows:

      1. The connecting PV1-F twin solar cables between the solar cell module and the module is generally connected directly with the connecting cable attached to the module junction box, and a special cable can be used when the length is long enough. Depending on the power of the components, this type of connecting cable has three specifications with a cross-sectional area of 2.5m㎡, 4.0m㎡, and 6.0m㎡. This type of connecting cable uses double-layer insulation, which has superior resistance to ultraviolet rays, water, ozone, acid, and salt, as well as superior all-weather capability and abrasion resistance.

      2. The connection PV1-F twin solar cables between the battery and the inverter requires the use of a multi-strand flexible wire that passes UL, and it should be connected as close as possible. Choosing a short and thick cable can reduce loss, efficiency, and enhance reliability.

      3. The connecting PV1-F twin solar cables between the battery square array and the controller or DC junction box also require the use of multiple strands of flexible wires that pass UL. The cross-sectional area specification is determined by the output current of the square array.