Photovoltaic cables are often exposed to the sun and solar systems are often used under harsh environmental conditions such as high temperature and UV radiation. In Europe, sunny weather will cause solar systems to reach field temperatures of up to 100 ° C. At present, we can use a variety of materials, PVC, rubber, TPE and high quality cross-linked materials, but unfortunately, the rated temperature of 90 ° C rubber cables, and even the rated temperature of 70 ° C PVC cable Also often used outdoors, the current Golden Sun project frequently launched, there are many contractors in order to save costs, do not choose a solar system cable, but choose ordinary pvc cable instead of photovoltaic cable, apparently, it will greatly affect the use of the system life. The characteristics of a PV cable are determined by its cable-specific insulation and sheathing materials, which we call cross-linked PE. After irradiation by an IR accelerator, the molecular structure of the cable material changes to provide some aspects of its performance . Anti- mechanical load In fact, during installation and maintenance, the cables can be routed on the sharp edges of the roof structure while the cables are subject to pressure, bending, tension, cross-tensile load and strong impact. If the cable jacket is not strong enough, the cable insulation can be severely damaged, affecting the lifetime of the entire cable or causing problems such as short circuits, fire and personal injury.