PV SOLAR CABLE with MC4 Compatible Connectors, MALE and FEMALE, 10/1, 25FT, 600 V, PV WIRE NOT THHN wire. Made in USA This may be used to extend one wire 25 feet to another MC connection, or cut in half to extend both positive and negative wires 12.5 feet to normal wire connections. Photovoltaic Wire, commonly known as PV Wire, is used as a interconnection wire for photovoltaic power systems. This product is sunlight and UV resistant and commonly used in solar applications. UL & ROHS compliant. All Wires are UL Listed and Sunlight Resistant.