Solar Panel Wire Specifications: One pair (1 black + 1 red) of 12AWG solar panel wires are made of all-copper material, offering improved electrical and thermal conductivity and corrosion resistance. This reduces power loss during use, thereby improving charging efficiency.Product Specifications: Professional photovoltaic solar cable, TV and CE certified, cross-sectional area: 4mm, temperature range: ambient -40C-90C, test voltage: 6500V, conductor resistance: (20C) 5.09/km, UV-resistant, rated current: 57A.The IP67 waterproof rating enables the solar panel wire to operate outdoors for extended periods (approximately 30 years). The PV solar cable jacket is made of durable PPO flame-retardant insulation material. The extra-thick insulation layer can withstand extreme heat and cold, from -40F to 194F (-40C to 90C). Designed for extreme weather, it can be buried directly in the ground.[Solar Extension Cord Installation and Usage]: Each solar extension cord comes with male and female connectors (installed) on both ends. They lock and unlock with a stable self-locking system, allowing you to connect multiple cables together to extend the length. One end connects to the solar panel, and the other to the solar charge controller for easy operation.[Solar Extension Cord Installation and Usage]: The solar extension cord is moisture-resistant, UV-resistant, and corrosion-resistant. Designed for long life and outdoor use. It is suitable for solar power plants, photovoltaic connectors, boats, and RVs, and easily connects to similar connector types included with most solar modules. We offer a variety of wire gauges (10AWG and 12AWG) and lengths (10, 20, 30, 50, and 70 feet) to meet your specific solar panel system needs.