My Electronet is three years old and already starting to fail. I’ve confirmed that the pulser is working fine, with nearly 10,000 volts coming out. But once connected to four sections of fence, I’m lucky to get 1,200 volts. 4,000 volts is an adequate shock to really convince animals not to test it, 2,000 is marginal. A thousand volts is more like a tickle.
I believe this reduction in performance is just caused by wear and tear: the metal filaments woven into the fence strands are small and fragile. Over time, with lambs occasionally trying to ram their way through in some panic, snags on blackberry vines, repairs from dog chewing, and the sliding through plastic guides that happens when you tension the fencing, have all taken their toll; increasing the resistivity of the fence.
