Custom photovoltaic extension cable need to pay attention to what？

When customizing photovoltaic extension cables, there are several important considerations to ensure the quality and safety of the cables. Here are the key points:

1. Cable Specifications and Voltage Rating
   Choose the appropriate cable specifications based on the operating voltage and current of the photovoltaic system. Since the DC voltage in photovoltaic systems is relatively high, the cable’s voltage rating should be sufficient (typically 600V or higher). The cross-sectional size of the cable should be selected according to the power to ensure it can handle the system's current load.

2. Cable Durability and UV Resistance
   Photovoltaic extension cables are usually exposed outdoors, so they need to have good weather resistance, including protection against sunlight, rain, and cold temperatures. It is important to choose a cable with a UV-resistant and high-temperature-resistant outer insulation material (such as TPE, PVC, PE, etc.).

3. Connector and Plug Quality
   Since the photovoltaic extension cable often needs to be connected to other equipment, the quality of the connectors and plugs must ensure good conductivity and stable contact. Choosing waterproof connectors can effectively prevent moisture-related issues, reducing the risk of electrical failures.

4. Cable Length and Allowable Voltage Drop
   The longer the extension cable, the greater the voltage drop, which can affect the system's efficiency. When customizing, it’s important to consider the actual requirements and the impact of voltage drop. For longer extension cables, you may need to select a larger cable cross-section to minimize voltage drop.

5. Safety Certifications and Standards Compliance
   Ensure that the selected photovoltaic extension cables meet relevant national or international standards (e.g., UL, IEC). These certifications ensure product quality and safety, reducing the risk of safety hazards due to the use of substandard cables.

6. Environmental Adaptability
   Depending on the installation location, you may need to consider whether the cable has properties such as waterproofing, fire resistance, or resistance to acids and alkalis. For environments with high humidity or corrosive conditions, cables with stronger adaptability are required.

7. Ease of Installation
   When customizing, consider the cable’s flexibility and ease of installation, especially in complex wiring setups. Suitable cables can significantly simplify the installation and maintenance process.
   

In summary, when customizing photovoltaic extension cables, it is important to consider factors such as current, voltage, environmental adaptability, and ease of installation to ensure the long-term, stable operation of the photovoltaic system.