A Battery Energizer System is a good choice for remote area without reliable mains power. 

The Xstop® BA100 Battery Operated Low Impedance Fence Energizer powers up to 20KM of typical electric fence. Idea for small fence line .With the mobility offered by DC-powered fence energizers, you’ll be able to keep your animals safe and your property protected – even on distant sections of your property.

LED Indicator pulse light enable to easy monitor enegizer working status. Weatherproof designer with a rugged, heavy-duty case protects the circuitry from weather extremes. 

Xstop® BA100 energizer is built to CE safety specifications and IP54 approved.