Gallagher's 1 Joule Solar Engergizer powers up to 30 miles / 100 acres and comes with an integrated solar panel, rechargeable battery, and leadset. Two operating modes ensure optimum battery management and animal control specific to fencing requirements. Wildlife control mode operates with a fast pulse day and night to ensure wildlife exclusion and the livestock animal control mode operates with a fast pulse during the day and a slower pulse at night for when domestic animals are less active. Clean Fence: 30miles / 100acres Typical Fence: 8miles / 60acres | Gallagher S100 Solar Energizer