The purpose of the photovoltaic line is mainly to connect photovoltaic panels and inverters, and is often used in systems such as solar water heaters. Due to the large current that needs to be transmitted between the photovoltaic panel and the inverter, the photovoltaic line needs to have high anti interference ability, high temperature resistance, cold resistance and corrosion resistance. In addition to this, the photovoltaic wire needs to have sufficient mechanical strength and durability.