Solar powered energisers with built in solar cells and batteries are a great low-cost solution for powering fences where mains is not easily available.
The P35 has an integrated 3W solar panel and 6V/4Ah gel-cell battery. It is ideal for small cattle and horse pasture. Max fence length (no vegetation): 1600m. Max fence length (with vegetation): 600m.
Energy output 0.21 Joules.