Gallagher's S40 with 0.4 Joules of stored energy powers up to 25 miles / 80 acres and comes complete with solar panel, battery and leadset. Great solar choice selection for wildlife exclusion. Features a 360 degree mounting on steel posts for correct orientation toward the sun - allows the energizer to be mounted on a steel post that is already part of the fence line, regardless of which way the post is facing. | Gallagher Solar Fence Energizer S40