Solar Panel Cable 100 Ft – Mc4 Pv Extension- 12 awg 1000 vdc – Sunlight Resistant This may be used to extend one wire 100 feet to another MC connection, or cut in half to extend both positive and negative wires 50 feet to normal wire connections. Photovoltaic Wire, commonly known as PV Wire, is used as a grounded interconnection wire and for underground photovoltaic power systems. This product is sunlight and UV resistant and commonly used in solar applications. ROHS compliant. All Wires are UL Listed and Sunlight Resistant.