PV Connector: Hard plastic connectors at each end,female and male connectors. Black wire sunlight resistant cable extends and locks built-in cables. Durable : UV resistant and waterproof, TUV tested cable. Compliance: TUV logo print per feet indicates that the cable meets TUV standards for PV solar application User-friendly: Make more space between your solar panels and between your solar panel and charge controller. Application Solar On/Off-Grid System