electric fence energisers or energizersWhat is an electric fence energiser ?

By definition an electric fence energiser is an electric device used to control the electrical pulse sent down the fence via a power source, usually battery or mains 240v power.

The energiser uses capacitors to store the charge and releases it down the fence line or live wire and when a grounded object like an animal is touching the fence an electrical stream flows through the body of the animal and back through the ground to the earth return terminal of the energiser.

Generally a pulse is sent down the live wire of the fence about every 1.5 seconds, this can vary across different brands and models of energisers.
Most battery energisers these days will make the pulse time further apart to save on battery power, some mains and battery fencers even have buttons where you can choose the timing of the pulse (generally fast, medium, or slow).

Most electric fence energizers have an output voltage of around 7000 volts at the output or live terminal. The amount that ends up on the fence will depend on various factors like the quality of your connections, what type of fencing wire you are using and how well the live wire is insulated away from any conductive materials. These things can lead to voltage leaks. Think of it like a hole in a water pipe, if you have lots of leaks and blockages you will not end up with allot of water coming out the end of your pipe.


Energisers are also known as

  • Fence charger
  • Energizer
  • Charger
  • Fencer
  • Fencing unit
  • Power unit

What is the best way to power my electric fence energiser?

Electric fence energizers can be run off both mains 240v power or batteries, you can even charge the battery with a solar panel to save having to charge the battery every few weeks.

Modern energisers are very power efficient and unless there is a load on the fence like grass or other vegetation "earthing" the fence out they are very low energy users with a 5km mains powered energiser costing about $5.00 a year to run.

These days the big thing on the market is energisers that can be run off mains power or battery power (solar if panel is attached to battery) depending on where the energiser is situated and what kind of power source is available.

If you can, always try to run an energiser off mains power as this is the most cost effective way. Batteries need replacing every 2-3 years and at the low cost of running your energiser of the mains supply you will save a fair bit if you don't have to go replacing batteries and your fence will not lose power when the batteries are running low.

If you have regular power outages maybe you should then consider a battery / solar energiser as this will ensure your fence is up and running with more reliability, just make sure you keep an eye on the condition of the battery.

Solar energisers are best used when the fence is too far from a mains outlet or if there is no mains power at all. The initial cost and upkeep of a solar energizer is far greater than that of a mains powered energiser.

What brand should I choose and how much should I pay?

Always remember in most cases you get what you pay for.

At Electric Fence Australia we try to supply only the most reliable and cost effective energisers on the market.

Quite frankly we don't like dealing with warranties and customers that aren't satisfied so it is our interest to do as such.

As for what brand and how much you should pay it is really a matter of considering the value of your stock and the importance of a reliable electric fence.

All the brands we sell are highly regulated by Australian standards so any of the fencing brand names on this site are safe to buy from.

Higher costing energisers "generally" have better quality electrical components in them so they will last longer and be more reliable.

Keep in mind you may also be paying for extra features. It is really up to you if you need all the bells and whistles for your energiser, if you don't need them don't bother , you are better off putting the extra money toward a basic energiser of higher quality. Most people want an energiser they can set up turn on and forget about, while this is ideal it is still recommended you check on the fence and energiser at least once a week or more depending on the value of your stock and the implications of not having your animals contained properly.