Photovoltaic cables are constantly exposed to sunlight and solar systems are often used under harsh environmental conditions such as high temperatures and UV radiation. In Europe, sunny days can lead to solar system site temperatures of up to 100°C. At present, the various materials we can use are PVC, rubber, TPE and high quality cross-link materials, but unfortunately, there are rubber cables rated at 90°C, and even PVC cables rated at 70°C It is also often used outdoors. At present, the National Golden Sun Project is launched frequently. In order to save costs, many contractors do not choose special cables for solar systems, but choose ordinary pvc cables instead of photovoltaic cables. Obviously, this will greatly affect the use of the system. life.