Electric Fencers Solar Powered - Ultra Low Impedance 2.5-Watt Panel - 12-Volt Battery ABS flame retardant, rugged weather and UV resistant plastic construction. Maintains high voltage levels along the entire fence line to repel the most difficult animals. Shocks through the heaviest fence loads and overgrowth. Powers up to 200 acres for al l animal types. Operates up to 20 days in total darkness.