Harvest the sun's energy for your fencing needs with the Zareba® 10 Mile Solar Powered Low Impedance Fence Charger. This energizer delivers the containment power you need without worrying about dead batteries or electrical outlet connections. Use this 0.15 joule output solar energizer to keep short-haired animals properly contained inside their fencing. This fence charger is for use in moderate vegetation conditions. Battery is included. Once this battery is fully charged by its solar panel, your energizer can operate up to 2 weeks with no sun.