The importance of solar photovoltaic cables for solar engineering.

The importance of  solar photovoltaic cables for solar engineering.

In recent years, the technology of the photovoltaic industry has developed faster and faster, the power of a single module has become larger and larger, and the current of the string has become larger and larger, and the current of high-power modules has reached more than 17A.

In terms of system design, the use of high-power components and reasonable over-provisioning can reduce the initial investment cost and kWh cost of the system. The cost of AC and DC cables in the system is not low. How should the design and selection be done to reduce the cost?

1. Selection of DC cable

DC cables are installed outdoors. Generally, it is recommended to choose a photovoltaic special cable that has been cross-linked by irradiation.

After being irradiated by high-energy electron beams, the molecular structure of the insulating layer material of the cable changes from linear to three-dimensional network molecular structure, which is resistant to temperature.

The grade is increased from non-crosslinked 70°C to 90°C, 105°C, 125°C, 135°C, and even 150°C, which is 15-50% higher than the current carrying capacity of cables of the same specification, and can withstand severe temperature changes and chemical erosion.

Used outdoors for over 25 years. When selecting the DC cable, it is necessary to select products with relevant certifications from regular manufacturers to ensure the needs of long-term outdoor use.