A Few More Things to Consider when Buying an Energizer

Warranty & Service. Let’s face it, these electric fence energizers are electronic – at some point in time you will likely need service or repair. Find out where your unit can be repaired under warranty and beyond. Warranty periods will generally vary from 1 to 3 years. Some sellers of Energizers have their own service department, some do not.

How many ground rods does this energizer require? Grounding is very important to allow all energizers to perform at an optimum level. If your contact or sales person cannot answer that one question, then I would suggest you continue shopping elsewhere. In general, you will need about 3 feet of ground rod per output joule or by example: a 10 joule energizer will require around 30 feet of ground rod in the ground, or 5 each 6’ ground rods.

Does the unit have internal lightning protection? Most energizers will have at least 2 fuses. One for the input power side and one for the fence side. Some put one on the outside for easy replacement, some do not. Ask if you can replace the fuses yourself or if you have to send it in to have that done.

Don’t skimp on the price of your energizer! Considering all the costs of your electric fence system – the energizer is at the lower end, regarding costs per foot. A great energizer will likely come in at less than a penny a foot. But, there is always that mental block of spending $300 or $600. You will be wise to spend the $600 to get dependability and performance. Personally, I am pro “Buy American”. But after years of working with and observing electric fencing I highly value the benefits of New Zealand made Energizers. The big four are: Gallagher, Stafix, Pel, and Speedrite and they are hard to beat. All of these units are made to use and made to last. I have seen barn walls full of abandoned $100 energizers !!


About Gary Duncan

Gary has been active in the fence business for over 15 years. He also raises Highland cattle in a management intensive grazing system and was the first person to market the PasturePro post back in 2005. He enjoys discussing all things grazing and is the main contributor to the blog.
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2 Responses to A Few More Things to Consider when Buying an Energizer

  1. avatar Carol Lokey says:

    If we have 15 miles of fencing, but buy an energizer rated for 50 miles, will we get more zap? We are trying to keep deer out, rather than livestock in.

    • avatar Gary Duncan says:

      Hi Carol,
      Yes, that would be a good assumption. More output joules usually relates to more zap !
      Although, I dont neccessarily go along with the mileage ratings on the box of most energizer manufacturers. Generally they will rate it for a “clean fence” at a ratio of about 1 joule of power for 10 miles of fence.
      (and we all know that clean fences are not common place)
      If you have an average grass load on the fence a ratio of 1 joule for each 3 miles of fence would be better. If you expect a heavy grass, forage, weed load on the fence then go bigger.
      For your 15 miles and my ratio of 1 output joule to 3 miles of fence would relate to a charger of at least 5 joules (15 miles divided by 3=5 joules)
      Also note that some chargers show stored joules and some show output joules. The output will generally be about 30% less than the stored. Go with output joules.
      Hope that helps.

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