Galvanized ground rod ideal for hard ground conditions.
A simple guide is one ground rod for every five joules of stored energy with a minimum of three ground rods. When in doubt, add more ground rods. The number of ground rods will vary depending on the power of the energizer and the soil type. High-powered energizers need more ground rods than low-powered energizers. Dry, sandy, rocky, or frozen soil will require more ground rods than wet soils.
Why does the Energizer need a ground system? The ground is half the circuit of your fencing system. Electrons travel from the energizer, along the fence wires, and back through the ground to the Energizer to complete the circuit. Like a radio antenna collects sound waves, the ground system collects the electrons. The ground must be as conductive as possible for the fence to give the animal an effective shock.