(1) The withstand voltage value of the cable should be greater than the highest voltage of the system. For 380V output AC cables, 450/750V cables should be selected.

      (2) For the connection between the inside of the photovoltaic array and between the array, the rated current of the cable selected is 1.56 times the maximum continuous current in the calculated cable. Photovoltaic cable

      (3) For the connection of AC load, the selected cable rated current is 1.25 times the maximum continuous current in the calculated cable.

      (4) For the connection of the inverter, the selected cable rated current is 1.25 times the maximum continuous current in the calculated cable.

      (5) Consider the influence of temperature on the performance of the cable. The higher the temperature, the lower the current-carrying capacity of the cable. The cable should be installed in a ventilated place as far as possible.

      (6) Consider that the voltage drop should not exceed 2%.

      The direct current loop is often affected by a variety of unfavorable factors during operation, resulting in grounding, making the system unable to operate normally. Such as extrusion, poor cable manufacturing, unqualified insulation materials, low insulation performance, aging of the DC system insulation, or certain damage defects can cause grounding or become a grounding hazard. In addition, the intrusion or bite of small animals in the outdoor environment can also cause DC ground faults. Therefore, in this case, armored cables with anti-rodent agent sheaths are generally used.