The electric fencing energiser

The output of an electric fencing energiser is characterised mainly by three important output ratings or features:

Load voltage (in Volt)

The important factor is not the voltage produced by an electric fencing energiser in open circuit (without load) but the load voltage with a 500 Ohm load (500 Ohm equals the load of an animal contact).

Acc. to VDE specifications, the minimum load voltage must be 2 000 Volt to guarantee fencing effectiveness; a minimum voltage of 3 000 Volt is recommended, however.

Discharge or impulse energy (in Joule)

This is the maximum impulse energy that the electric fencing energiser can apply to the fence (depending on earthing quality), i.e. the higher the discharge or impulse energy, the higher the electric shock to the animal and the easier it is to prevent the growth of new greenery.

Charging energy (in Joule)

This is the energy the electric fencing energiser draws from the mains socket or the battery and stores internally.

Electric fencing energisers are furthermore differentiated by the type of power supply.

The following types of electric fencing energisers are available:

  • 230 Volt mains units (AC from the mains socket)
  • 12 Volt battery powered equipment (DC from a rechargeable battery: e.g. car battery)
  • 12 Volt battery powered equipment (DC from solar cells and special rechargeable batteries)
  • 9 Volt battery powered equipment (DC from non-rechargeable batteries)

Many factors should be considered before buying a suitable electric fencing energiser.

The available power must first of all be considered and the animals that are to be fenced in or kept out.