Product information "Gallagher M550 mains fence energiser (230 V)"

The M550 from the special edition range is a powerful mains energiser that is suitable for long multiwire fencing with a length of up to 35km. The energiser is maintenance- free and easy to operate. It has an excellent price/quality ratio and a built-in lightning conductor.


  • Maximum output voltage (V): 9200
  • Charging energy (J): 5.5
  • Maximum impulse energy (J): 3.9
  • Number of earthing rods required: 3 x 2 m
  • Multiwire distance – ideal conditions (km): 35
  • Multiwire distance – light growth (km): 25
  • Multiwire distance – recommended (km): 9
  • Fence surface (ha) (recommended): 22


Animal type: Cattle, Goat, Horse, Large game, Pig, Sheep, Small game
Output with 500 Ohm (V): 7000
Voltage with 100 Ohm (V): 3500
Stored Energy (J): 5,5
Output Energy (J): 3,9
Single Wire Fence distance - Ideal conditions (km): 110
Multi (2) Wire Fence distance - Ideal conditions (km): 35
Multi (2) Wire Fence distance - Light conditions (km) : 25
Multi (3) Wire Fence distance - Recommended (km): 9
Grid area (Hec/Acre) : 22/55
Maximum output Voltage: 9200
Avg. power cons.(W): 7
Alarm-indicator-LED Earth voltage: -
Device indicator light On/Off:
Adaptive Control: -
Delay with load (Timedelay) : -
Security with short-circuit: -
Built-in lightning diverter:
Advised Bentonite Super Earth Kit (number of buckets): 1
Recommended number of earth stakes: 3x1,7m
IPX classification: IPX4
Warranty (years): 3
Weight (Kg): 1,5

Complete with:

EU Warning sign (universal)
A highly visible sign that warns that a fence is electrified. Required by law, to be used on an electric fence that is adjacent to a public road. Signs must be spaced 50m apart.

Digital Voltmeter
Supplies exact information on the condition of your fence. Makes targeted trouble shooting very easy and efficient. Auto ON/OFF. Helpful tool for checking earthing system. Prepare for the grazing season, do the Gallagher check

Lightning diverter
Unique adjustable lightning diverter, suitable for all energisers. Gallagher recommends all permanent energisers should be fitted with a lightning diverter to help protect against lightning damage. Mount the lightning diverter between the fence and the energiser.

Earthstake 1,7m with earth clamp (1)
Without a proper Earth System, your energiser will not perform. Always use galvanised earth stakes. Battery Energisers: Earth Stake length 1m c/w clamp. Mains Energisers: Earth Stake length 1,7m c/w clamp. To improve the earthing of Dry- cell battery units use the 0,5m stake (c/w 3m of wire)

Ground cable ø2.5mm (25 metres) - 35 Ohm/1km
Ground cable is used to connect the energiser to the fence and the earth rods. The cable is also used to make underground fence connections, for instance, under gates or openings. This 2.5mm ground cable should be used for distances of more than 30 metres*. The handy metre marks on the cable, makes set up easy as the measuring is done for you. *For distances less than 30 metres then 1.6mm ground cable is recommended.

Cut out switch
By using a switch, you can divide your fence into several sections and switch them on and off independently of each other. This will also help you trace any faults that occur.

Fence control
Using this device, you can use SMS messages to switch your energiser on and off, check the voltage of the fence and even track its location. In addition, the device can send alarm notifications to your phone. It is also possible to receive detailed daily information about your fence and the device stores events in an electronic logbook.