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What size fence energizer do I need?

One should always compare energizers by the number of joules it puts out.

Joules– A measure of energy that essentially tells you the relative power of each energizer. For comparison with other brands, we provide both the “stored” and “output” joules for each product. Remember that the best use of this number is to look at two chargers and determine which one is more powerful. You won’t likely ever get the recommendation to buy a specific joule level of charger. that is where measures of distance come into play. NOTE: Do not confuse joules and volts. All Gallagher products are around 7,000 voltsat the charger. You won’t likely need more than that for any animal control.

 Miles– All our chargers come with a “miles” rating to help you decide which charger will be ideal for your length of fence. The longer your fence line, the bigger charger you will need to maintain 7,000 volts along the entire length. If you have 3 miles of fence line with 4 lines of poly wire you actually have 12 miles of fencing material to be powered. To make things simpler for you each of our charger products is rated at a “multi-wire” distance (3 wires) and a “single-wire” won’t likely need more than that for any animal control.

Energizers come in 5 styles

 AC (110 volt)  – Battery powered  –  AC/Battery combination – Solar ready – i series.

Will this much snow affect my solar panel?

Answer – Yes, even though 80 % of the solar panel is still  exposed to the sun, the 20% of the snow on the panel may actually limit energy production by as much as 80%.

In very rough terms – 20% snow coverage of a solar panel may cut production by 80%. Sort of the 80/20 rule. In extreme northern latitudes, with few hours of direct sunshine, and cloudy conditions for 10 days or more, it is very important to keep solar panels clean of snow. Or if you have some favorite birds that roust on the top of the panel – best to clean the panel from time to time.

What energizer is in my trailer?

Razer Grazer Trailers come with Speedrite 3000 Unigizer. (4.5 joules stored)  

Gallagher B280 (2.8 stored) are also available. Call for details

Power Grazer Trailers come with a Speedrite 6000i Unigizer (9.0 joules stored)– can be battery or AC, and comes with a remote that can test the fence and also turn on or turn off the energizer from anywhere on the fence.

Speedrite remote fault finder is included with the Speedrite 6000i.

 When purchased separately is $315.95

Power Grazer Trailers can be equipped with Gallagher B700 (7 joules stored). Call for details.

What Electric Rope is used in Power Grazer Trailers?

 Power Grazer Trailer base model comes equipped with one mile of Gallagher Turbo Braid Rope. An additional one mile – Two miles in total will fit onto the electric reel – is also available. Two miles means you can fence around a quarter section with portable fence.

Gallagher Equibraid Rope Specifications.

  • Unique 3/16″ braided construction.
  • Contains nine strands of highly conductive mixed-metal filaments to ensure conductivity.
  • Highly visible, attractive and easy to install.
  • Resistance:  155 ohms/mile.
  • Available in 200 meter and 400-meter rolls
  • An extra mile on your Power Grazer Trailer is an additional $999.00

What Electric Rope is used in Razer Grazer Trailers?

Razer Grazer Trailer base model comes equipped with ½ mile of Power Braid Rope. Additional reels preround with ½ mile of Power Braid are also available. Most customers will purchase two additional reels (gives you a total of three reels). This allows you to do a back fence, a forward fence, and a fence for the paddock you will be going into.

Power Braid Reflective Rope – by Range Ward

  • Exclusive-reflective tracer braided into the rope provides night visibility
  • larger ¼ “electric braid rope.
  • Overlapping highly conductive coated copper provides excellent conductivity.
  • Polyester braid cover with a polypropylene core provides durability with a 1300 lb break strength
  • White with green tracer provides excellent daytime visibility
  • Available in 2640 ft rolls on reusable heavy-duty interlocking reels
  • An extra pre-wound ½ mile reel of Power Braid is $649.00/reel

Razer Grazers can also be equipped with pre-wound 1 km reel of Gallagher Equibraid Rope.  $790.00/reel

What’s the most common cause of power fence failures?

80% of all power fence problems can be traced to inadequate grounding. Your grounding system must be perfect for your fence to perform at its best. After all, it’s half the system.

Recommended Grounding

In general, you will need one 6-foot galvanized ground rod for every three joules of energizer.

Power Grazer and Razer Grazer Trailers come equipped with a 24” hammer in/hammer out portableground rod.Since most portable fence is less than 2 miles, this is normally adequate.

Use hammer to drive ground rod down
Use hammer to drive ground rod up


If you are in dry, or rocky soil conditions additional ground rods are required. 

Additional portable ground rods are $49.95/rod.      Permanent Gallagher ground rods are $15.99/rod

Can I use my Power Grazer Trailer for Permanent Electric Fence?

Power Grazer Trailers come equipped with a 9 stored joule energizer. In most conditions this energizer can power up to 30 miles of permanent one wire galvanized high tensile fence. Many clients will park their Power Grazer Trailer in the same spot where 3 or more – 6-foot ground rods have been permanently installed. This provides a solar powered energizer for your permanent fence.

Note-For permanent fence we recommend a minimum of three 6-foot ground rods 10 feet 

Additional galvanized Gallagher ground rods $15.99/rod

How to test your ground rod

  1. Unplug your fence energizer.
  2. Place the fence under heavy load by “shorting” the fence as follows: At a location on the fence at least 100 yards from the energizer, lean 3 or 4 steel stakes or unpainted T-posts against the “hot” wire of the fence. Alternatively, some people have found a successful method is to push several pieces of fence wire into the earth and wrap the opposite ends around the hot wire.
  3. Plug the fence energizer in and check the fence line voltage with a digital voltmeter. You want to see that the voltage has dropped below 2,000V due to shorting the fence. On some high-powered fence energizers you may not be able to short the fence below 2,000V. However, you can still test them at a higher voltage.
  4. Continue to short the fence by leaning steel posts or by making wire connections to ground at 100 yards distance or more from energizer until the fence line voltage drops below 2,000V.
  5. You are now ready to test the energizer ground system. Connect one lead of the digital voltmeter to a 12-inch metal stake driven into the ground 3 feet away from the last fence energizer ground rod. Connect the second lead to the ground rod furthest from the energizer. The voltage reading should ideally be zero or no more than 200V.
  6. If the digital voltmeter reading is under 200V, your ground system is adequate and you will get near maximum performance from your electric fence energizer.
  7. If the reading is above 200V, then your ground system needs improvement.

Gallagher fence volt/current and fault finder

Fits in your shirt pocket 

Save time tracking down fence and ground faults$187.99

Can I use copper ground rods?

No. Copper ground rods are not recommended since copper will react with any galvanized steel through electrolysis and corrode the connection. Use only galvanized steel components to avoid this problem.

Why is it best to use galvanized grounding rods instead of just driving a large copper pole into the ground since copper is a good conductor?
Bare metals driven into the ground, regardless of their conductivity, are susceptible to oxidation and/or rust. Because power fence energizers emit only a brief, powerful jolt, it is very important that the conductivity of ground rods be maximized to ensure that the animal receives a good shock.

Why does the voltage increase as I move down the fence line?

The voltage on your fence is greater closer to the end due to what is called the “bounce effect.” This means that the pulse the energizer has sent down the fence reached the end and is returning back up the fence. It then meets the next pulse coming from the energizer creating a voltage spike or “bounce.” This really means that your energizer joule rating is more than adequate for your fence load and has a surplus of energy, which is exactly what you want in your system.

How do I carry the hot and ground past all the gates in my fence?

The best way is to bury heavy-duty insulated cable in a trench about 10 inches deep. Make sure it’s rated to 20,000 volts minimum or it may leak current with today’s high-power energizers. Do not staple it to the post. Remember to carry the ground wire across the gateway also, using the same type of cable. It can be buried in the same trench as the hot cable.

Bungy electric gates are easy to erect, easy to use, and provide that extra “give” when animals crowd the corner or gate.

Bungy electric gates should not be used to provide power for additional fence on the other side of the gate. 

Always use heavy duty insulated cable either overhead or underground to power additional fence.

Bungy kit price for 18 to 35 ft gate is $49.95