Power up to 25 miles or 80 acres of fence with this dependable solar unit. The Gallagher S40 Solar Energizer comes complete with solar panel, battery and lead set. 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.