The technological development of photovoltaic cables is evolving towards high performance, long lifespan, environmental adaptability, and intelligent features.
Material innovation focuses on new sheathing and insulation materials to improve weather resistance, flame retardancy, and service life. For example, long-life sheathing materials resistant to UV aging utilize benzotriazole UV absorbers and hindered amine light stabilizers to enhance UV resistance and heat aging resistance. High-temperature resistant halogen-free flame-retardant cross-linked polyolefin insulation materials improve flame retardancy efficiency through the synergistic effect of metal hydroxides and phosphorus-nitrogen flame retardants, adapting to extreme temperature changes. Flexible photovoltaic cables use materials such as polycaprolactam and modified silica to inhibit hydrolysis and extend service life in humid environments.
Structural optimization enhances mechanical protection and environmental adaptability through armored composite layers and multifunctional protective layers. For example, multifunctional protective layers form a physical rodent and termite barrier, improving tensile strength, corrosion resistance, and extreme cold resistance, making them suitable for various laying methods such as direct burial and overhead installation. Waterproof photovoltaic cables feature independent air-filled cavities in the sheath layer to enhance waterproof performance, adapting to floating photovoltaic applications.
Specialized environmental solutions are developed for cables designed for extreme environments. For example, in the Qinghai-Tibet Plateau environment, vegetable oil-based plasticizers are used to improve the cable's cold resistance, and nano-coating technology is applied to enhance its UV resistance, resulting in a product lifespan of over 13 years. For high-salt-fog marine environments, cables with comprehensive waterproof ratings and corrosion resistance are developed. In the desert and barren regions, cables with resistance to alternating high and low temperatures, strong UV radiation, and rodent and termite protection are used.
