Speedrite S500 Solar EnergizerThe Speedrite S500 is a 0. 5 J solar energizer that powers up to 30 miles or 100 acres of electric fencing. The S500 includes an internal rechargeable 12 volt, 7 Ah SLA battery and fence leads. The typical output voltage is 9,600V on open circuits, 7,100V on a standard load (1000 ohms) and 5,600V on a heavy load (500 ohms). The Speedrite S500 Integrated Solar Energizer is easily portable, simple and intuitive, plus its more powerful than comparable