Power up to 8 ha / 20 acres of single wire fence with the Gallagher M30 Fence Energizer. With 0.3 stored joules, the M30 is ideally suited for small pastures. This controller is robust and reliable, made to last with tough outer casing and built in lightning diverter. It is easy to use and install with simple fence terminals and hassle free mounting plus you can check power at a glance with the power on indicator.