Electric Fence Energisers for Reliable, Effective Electric Fencing

Choosing the Right Electric Fence Energisers

An energiser sends controlled electrical pulses along the fence conductor. Choosing the correct model is about more than simply matching an energiser to the total fence length. Vegetation touching the fence, the number of strands, conductor quality, earthing conditions and the type of animal being contained can all influence performance.

• Mains energisers are an excellent choice for permanent electric fencing where a suitable mains supply is available, particularly for longer or more demanding fence systems.
• Battery energisers provide portability for strip grazing, temporary paddocks and remote fields. Check the battery requirements and expected operating time when comparing models.
• Solar energisers are particularly useful where mains power is unavailable, using a solar panel to maintain the battery charge. Position the panel where it receives good daylight and keep it free from dirt and heavy shading.
• Consider output energy as well as the manufacturer's recommended fence length. Output joules indicate the energy delivered to the fence, while stored joules describe energy held within the energiser before losses.
• Allow extra capacity where long grass, weeds or other vegetation may contact the conductor, as these can drain energy from the fence and reduce its effectiveness.

Building an Effective Electric Fence System

The energiser is only one part of a reliable system. Complete your paddock or grazing set-up with suitable electric fence posts, highly visible electric fence tape or conductive electric fence wire. For poultry and smaller livestock, purpose-designed electric netting can provide a practical temporary enclosure.

Good-quality electric fence insulators prevent energy leaking into posts, while an electric fence reel makes temporary fencing quicker to install, move and store. For permanent installations, wire tensioners and strainers help maintain the correct conductor tension and a tidy, effective fence line.

Technical Specifications and Care

Compare energisers using their power source, output joules, recommended fence capacity and manufacturer guidance rather than relying on voltage alone. A powerful energiser cannot compensate for poor earthing: the earth system completes the electrical circuit when an animal touches the fence, so suitable earth stakes and good ground contact are essential.

Pro tip: Test the voltage at several points around the fence rather than only beside the energiser. A significant drop further along the line can indicate vegetation contact, damaged conductors, poor connections or inadequate earthing. Use an electric fence tester to check performance regularly, especially after storms, hedge cutting or moving temporary fencing.

For a complete installation, explore our electric fencing range, including electric fence posts and accessories.

Frequently Asked Questions

What size electric fence energiser do I need?

Choose according to fence length, number of strands, vegetation load and the animals being contained. For demanding or heavily vegetated fences, selecting an energiser with additional output capacity can help maintain effective performance.

Is a mains, battery or solar fence energiser best?

Mains fence energisers suit permanent fences with nearby electricity. Battery fence energisers are ideal for portable and remote fencing, while solar fence energisers offer convenient off-grid operation by using solar energy to maintain the battery charge.

How many joules should an electric fence energiser have?

The required output depends on fence length, conductor arrangement, vegetation and livestock. Compare output joules rather than stored energy alone, and follow the manufacturer's recommendations for the intended fence and animal type.