How To Select Solar Photovoltaic Cables?

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

Specific requirements are as follows:

The connection cables between solar cell modules and modules are generally directly connected to the connection cables attached to the module junction box. If the length is not enough, you can also use a dedicated extension cord. According to the power of the components, this type of connecting cable has three specifications with a cross-sectional area of 2.5m㎡dc pv cable, super solar pv cable 4mm2 、6mm2 dc cable xlpe power . This type of solar cable 4mm twin 、cable wire for solar panel、cable adopts double-layer insulating sheath, which has excellent resistance to ultraviolet rays, water, ozone, acid, and salt erosion, as well as excellent all-weather ability and abrasion resistance.

The connection cable between the battery and the inverter requires multi-strand flexible wires that have passed the UL test and should be connected as close as possible. Choosing short, thick cables can reduce system losses, increase efficiency, and enhance reliability.

The connection cables between the battery array and the controller or DC junction box are also required to use multi-strand flexible wires that have passed the UL test, and the cross-sectional area specifications are determined according to the maximum output current of the array.

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Photovoltaic cables 、2 core pv cable、solar power cable are often exposed to sunlight, and solar systems are often used under harsh environmental conditions, such as high temperature and ultraviolet radiation. In Europe, sunny days will cause the site temperature of solar systems to reach as high as 100°C. At present, the various Such materials are PVC, rubber, TPE and high-quality cross-connect materials, but unfortunately, rubber cables rated at 90°C, and even PVC cables rated at 70°C are often used outdoors, some In order to save costs, many contractors do not choose special wire solar cables、solar wire cable for solar systems, but choose ordinary pvc cables to replace solar cable xlpe. Obviously, this will greatly affect the service life of the system.

The characteristics of solar cable xlpe are determined by their special insulation and sheath materials for cables. We call them cross-linked PE. After being irradiated by an irradiation accelerator, the molecular structure of the cable materials will change, thereby providing various aspects of performance.