RED SNAP'R ESP30M-RS 30-Mile Solar Low Impedance Fence Charger Powers up to 30 miles of fence with solar charged battery Use with steel, aluminum, poly wire, poly rope and poly tape Less battery drain due to low impedance technology Resists shorts when the fence is in contact with weeds Input Voltage: 12 volt, (2) 6 VDC; 0.5 Joule Output; Output Voltage - 6.9 KV