Renogy Solar Panel Cable Kit - 4.5m. The Renogy Male to Female Solar Extension Cable allows you to make spatial adjustments to your solar power system in one simple step. This extension cable runs between the solar panel and charge controller or between two solar panels; allowing for greater space between both items. Like all other Solar Extension Cables; this product allows for greater customization of the solar power system. TUV tested cable. UV resistant and waterproof. Hard plastic connectors at each end. TUV logo print per feet indicates that the cable meets TUV standards for PV solar application.