Cables can be divided into DC cables and AC cables according to the system of photovoltaic power plants, and are classified as follows according to different uses and environments
1. DC cable
- Serial cables between components.
- Parallel cables between the strings and between the strings and the DC distribution box (combiner box).
- The cable between the DC distribution box and the inverter.
The above cables are all DC cables, which are often laid outdoors, and need to be protected from moisture, sun exposure, cold, heat, and ultraviolet rays. In some special environments, they also need to be resistant to chemical substances such as acids and alkalis.
2. AC cable
- The connecting cable from the inverter to the step-up transformer.
- The connecting cable from the step-up transformer to the power distribution device.
- Connecting cables from the power distribution device to the power grid or users.
This part of the cable is an AC load cable, which is often laid in the indoor environment, and can be selected according to the general power cable selection requirements.