Gerrish recommends 1 joule of output per mile of fence, regardless of how many strands of wire. If there’s a total of six miles of fence, it requires a minimum of a 6-joule energizer.
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Derynck, who represents Gallagher in Nebraska and the Dakotas, recommends a low-impedance energizer, with a low-amp fuse. “The larger the energizer, the smaller the voltage,” he says, because larger energizers are apt to power through more vegetation and short out. He considers 7,000-8,000 volts high for an energizer.
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