Speedrite AN90 (DC Battery) Energizer with stand

Advanced low impedance electric fence energizer offers uncompromising performance and a no-nonsense approach to livestock control.

This unit offers unique power settings with different pulse rates to help conserve battery power.

This is a portable, simple battery energizer that is used for temporary or short lengths of fence to keep in horses or cattle. Ideal for strip grazing

Batteries sold separately. See "Accessories Tab" below.

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119008 Speedrite AN90 (DC Battery) Energizer with stand In Stock 2.70 $99.00

Properly storing energizers and batteries for winter

User Manual [2 MB]
Installation & Warranty [178 KB]
Impedance-Wide vs Low [314 KB]

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Common Uses

For short, weed free cattle and horse fences. Great to take on trail rides for temporary paddocks and for strip grazing.



  • Stored joules .16
  • Released joules .12
  • .08 joules in moist soils
  • .09 joules in dry soils


  • Comes with wiring harness to connect energizer to fence and energizer to ground rod.
  • Comes with 12v leads to connect to an external 12v battery.
  • Includes an on/off switch.
  • Has 2 pulse settings to adapt to various situations.
    • Slow setting- approximately 2.5 seconds between pulses. Use where unknowing visitors may accidentally touch the fence or where livestock/predator pressure is low. 25 pulses per minute.
    • Fast setting- Pulse rate is approximately 1.5 seconds. Use when animal pressure is higher and where no visitors may contact the fence. 40 pulses per minute.
  • Will draw from a 12v deep cycle battery or 4 D cell batteries.
  • Draw from a 12v battery is 31 milliampere(mA) per hour when set on the 'fast pulse' setting and 19 when set to the 'slow pulse' setting. With this energizer a 12v 100 ampere hour, deep cycle battery will last 80* days when set on the fast setting and 131 * days when set on the slow setting. * Assumes being drawn down to 40% between charges.
  • The ground rod is built in.
  • Manufactured by Tru Test.

Should Power...

  • 1320' of multi-strand fence that has minimal grass load.
  • Distance is dependent on amount of grass/weed load on the fence.


Safe to use with all polywires, polyropes and tapes. Portable, lightweight and easy to move. Simple to operate


  1. Connect red lead's spade connector to fence terminal on top of energizer and clip other end of lead to fence
  2. Connect green clip to the ground rod/stake.
  3. Push black on/off button to desired setting (fast pulse or slow pulse) to turn on.
  4. Test fence.


  • Make sure the energizer is turned off before working on the fence or the energizer.
  • Use on size appropriate fences.
  • Nickel Cadmium batteries are not recommended. The energizer's pulse speed will become slower and operation between recharges may be as short as 1 week with Nickel Cadmium batteries.


To determine if the fault is with the fence or the energizer...

  1. Test the energizer first
  2. Turn off energizer.
  3. Disconnect ground wire and the fence wire.
  4. Turn energizer back on.
  5. With fence tester, put the ground probe (or clamp) to the ground terminal on the energizer and the metal loop (or positive clamp) at the top of the tester to the fence/positive terminal. The reading you get tells you how well the energizer is working without any other variables. If there is a very low voltage (under 4000v) or no voltage, then the energizer may have a problem. If the voltage is high (greater than 4000v) then the trouble lies with your fence. Most energizers put out between 5000v and 8000v when there is no load (i.e. no fence hooked up).
If the energizer is faulty and you are using a battery unit you need to learn if the battery or the energizer is the problem…
  1. If it's a 12 volt energizer carry the unit to a nearby vehicle and attach the input cords carefully to the vehicle's battery.
  2. If the energizer now works, then your fencer's battery needs to be recharged or replaced.
  3. If the energizer does not work, then you should call Premier re. repairs.
If the fence is at fault, then you must find the fault(s) and fix them. Here's how to start this process: If you have a Fault Finder you can simply touch the fence with the Fault Finder at various points along the electric fence(s). The Fault Finder will tell you at each point which direction to go in to locate the problem. Move in that direction testing as you go and you will arrive at the problem.

If you lack a Fault Finder…
  1. Walk or drive along the fence looking for any point in which the energized wires touch the soil, a steel post or a steel wire. On HT wire fences, check the wires at braces to see if they are touching a hot wire. On netting, look for a hot wire touching the metal stake at the bottom of the plastic posts. Also look for damaged insulators.
  2. If the fence can be separated into several parts (by switches or by disconnecting parts of it), you can locate the problem by beginning at the far end and then progressively turn off or disconnect the sections of fence. When the voltage on the remaining fence rises sharply, you've located the section(s) that's causing the problems.
  3. The alternative to (2.) is to begin at the fencer and progressively turn on sections of the fence. When the voltage suddenly drops you can assume that the problem is in the section most recently connected.

Our Unique 2-Year Warranty: If an energizer fails within 2 years from the purchase, Premier will replace the module/unit at our cost (unless the reason for its failure is customer abuse or neglect). Your credit card will be charged for the replacement but you will receive full credit when the failed item is back at Premier. Your only cost is shipping the failed item to us. If the original energizer is over 2 years old, we will repair and/or replace it, but you pay for the repair cost and freight.

Listed below are recommended optional components or related items. Your particular situation may require alternative recommendations. Please call and talk to our consultants if there are any questions at 800-282-6631.
Item # 117251 - In Stock
For all 12v energizers. Durable, safe rechargeable battery.
Item # 117700 - In Stock
6 volt Alkaline Lantern Battery. Used with Speedrite AN90 energizer.
Item # 125012 - In Stock
2 amp
Item # 134100 - In Stock
Device to indicate the approximate voltage on your electric fence.
Item # 151000 - In Stock
Ground rods are essential for energizers to work.
Item # 151200 - In Stock
Ground rods are essential for energizers to work.
Item # 251000 - In Stock
Famous for 2 qualities:
Item # 346000 - In Stock
Attaches to an electric fence to warn people that the fence is electrified.
Average Rating: 5 out of 5
Number of Reviews: 2 customers reviewed this product.

Write a Review

Date: July 12, 2015
Verell B
Would you recommend this product? Yes
I just installed a 25' square Versanet Plus femce with a Speedrite AN90 energizer. I found the AN90 to be very easy to work with & so far it's keep the deer & smaller critters away from my tomatoes & zucchinis!

I powered it with the 12V 7A-h deep cycle battery. I found to my pleasant surprise that the alligator clips on the AN90's battery leads were attached with 1/4" tab connectors. So I just unplugged the alligator clips & plugged the AN90 battery wires directly onto the battery's 1/4" tabs. Couldn't have been easier!

As soon as I get time I'll attach a small solar panel to trickle charge the battery.
Date: July 27, 2014
Margaret L from New York State
Would you recommend this product? Yes
Used to keep deer, chickens, woodchucks and whatever else wanders by out of a small 30x30 garden. Seems to be doing the job. The unit is easy to set up and move with the fence.
Date: June 5, 2013
Pamela P from New York
Would you recommend this product? Yes
First used the 1980's version of this charger for rotational grazing with my sheep and loved it. Chose the current (pardon the pun) version to use on my permanet garden fence and it works like a charm, keeping dogs, bunnies and groundhogs at bay so far. Love your products!
Date: August 25, 2010
Andrew M
Would you recommend this product? Yes
I'm so glad I found this energizer. So easy to use. I move my sheep and cattle sometimes twice a day - this comes along with each move in seconds. I get plenty of charge, too.