1. The main varieties are copper single TUV PV solar cable, aluminum single TUV PV solar cable and copper-aluminum alloy TUV PV solar cable, with wire diameter as the structural parameter, ranging from 0.01mm to 3.00mm. Except for some of the round single TUV PV solar cables used directly as products, most of them are semi-finished products used by twisting single wires into multiple twisted wires. In addition to the round single wires of a single material, there are also composite round single wires. Commonly used are bimetal round single TUV PV solar cables, such as aluminum clad steel wire (high conductivity of aluminum, strong tensile strength of steel wire), copper clad aluminum wire (high conductivity of copper, light aluminum) and coated single wire, such as tinned copper TUV PV solar cable, Nickel-plated copper wire.

      2. The round stranded TUV PV solar cables are products of large length, which have to withstand many times of winding and unwinding during production, installation and use. If the TUV PV solar cables with larger cross-sections are not used to twist small-diameter single TUV PV solar cables into a certain cross-section Twisted TUV PV solar cables, the product cannot be manufactured and used. Different use conditions and conditions require TUV PV solar cables and cables to have different flexibility-that is, bendable or twistable. Wires with the same material and the same cross-section can be composed of several structures, that is, the number and diameter of single wires are different. The more single wires in the same cross-section (the thinner the single TUV PV solar cables diameter), the higher the flexibility of the wire.