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Speedrite AN90 Energizer

Product Details

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★ ★ ★ ★ ★ (22) Read reviews »

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

Will draw from 4 D cell batteries or an external 6V or 12V lead-acid battery (not included).

Comparison chart with scales graphicView a comparison chart »

  • Speedrite AN90 Energizer

    Item #119008 | Weight 2.70 lbs
    Back-ordered: Expected on 07/01/2025
    Notification request sent
    $119.00
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Reviews (22)
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Properly Storing Energizers and Batteries for Winter

Instructions/Diagrams:

  • Instruction Manual [2 MB]
  • Installation & Warranty [387 KB]
  • Energizer FAQs [3 MB]
  • Fence FAQs [10 MB]

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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.


Specs

Should power…**

  • 1320' of multi-strand fence that has minimal grass load
**All distances are dependent on amount of grass/weed load on the fence. Low-impedance circuitry produces a short, very strong electrical pulse designed to cope with moderate weed load.

Miscellaneous

  • Will draw from a 12V deep cycle battery or 4 D cell batteries (not included)
  • 12V DC draw: 31 mA/hr. 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 recharges.

Energizer Specifications

  • 0.12 released joules
    • 0.12 joules in moist soils
    • 0.09 joules in dry soils
  • Pulses per minute: 38
  • Ground rod, built-in
  • Impedance type: Low
  • Input: (DC) 6V/12V battery
  • 6V/12V DC draw: 31 mA/hr
  • Wiring harness to connect energizer to fence and energizer to ground rod
  • 12V leads to connect to an external 12V battery
  • Stand with convenient carry handle and step in plate
  • Includes an on/off switch
  • Has 2 pulse settings to adapt to various situations:
    1. 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.
    2. 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.


Benefits

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


Installation

  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.


Troubleshooting

You’ll need an electric fence tester to measure voltage.

Start by measuring the voltage at the end of the fence line. If the voltage is below 3000V, follow these steps to determine if the problem is with the fence, or the energizer.

Test the energizer first!

  1. Turn off the energizer.
  2. Disconnect the wires going to the fence and ground stake/rod.
  3. Turn the energizer back on.
  4. Measure the voltage on the energizer between the two terminals (positive and negative) with a digital voltmeter or other high-voltage tester. Touch one end to “-“ (earth terminal) and the other end to “+” (fence terminal). The reading tells you how well the energizer is working without any other variables.
  5. If the tester reads below 5000V, then the energizer (or possibly the battery) is the problem. If the voltage is above 5000V, then the trouble lies with your fence.

If the energizer is at fault:

Determine if the battery or the energizer is the problem.
  • Test the battery with a low-voltage tester; recharge if lower than 12.2 volts
  • Check the grounding system
LEARN MORE

If the fence is at fault:

Re-attach the fence and ground wires to the energizer and turn it on. Then, walk or drive along the fence looking for situations that are reducing the voltage:
  • Conductors touching another wire, steel post or the soil
  • Broken or damaged insulators
LEARN MORE


Precautions

  • Make sure the power is turned off before working on the fence or the energizer.
  • Make sure the fence line is clear of grass and debris that may lower the fence’s voltage.
  • 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 Reduce Risk & Liability

  • Never place your head or upper spine near an electrified wire. Accidental head or neck contact can occur when pushing a voltage probe into the soil. Be careful when doing so to avoid head-to-wire contact!
  • Never attempt to step over or climb through an energized fence of any kind.
  • Never encourage anyone to touch an electric fence.


Warranty

3-year warranty for energizers and solar panels cover lightning damage and defective parts or workmanship. Should an energizer fail, we will replace the unit, bill you for the cost to do so, then reimburse you for warranted expenses after we have examined the failed unit. Misuse and flood damage are not covered.

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.

  • 6V Lantern Battery
    Batteries

    6V Lantern Battery

    Item #117700 - In Stock

    Lantern style 6v battery for Speedrite AN90 energizers and Foxlight predator lights.

    $4.96
  • MaxiShock Double Insulated Cable, 50'
    Energizer Solar Panels and Accessories

    MaxiShock Double Insulated Cable, 50'

    Item #164204 - Back-ordered: Expected on 06/03/2025
    Notification request sent

    Electric fence cable with thick layers of insulating for transporting high voltage pulses from the energizer to the fence line.

    $22.00
  • MaxiShock Double Insulated Cable, 100'
    Energizer Solar Panels and Accessories

    MaxiShock Double Insulated Cable, 100'

    Item #164207 - In Stock

    Electric fence cable with thick layers of insulating for transporting high voltage pulses from the energizer to the fence line.

    $38.00
  • Voltage Regulator
    Energizer Solar Panels and Accessories

    Voltage Regulator

    Item #148040 - In Stock

    Prevent overcharging by solar panels of electric fence energizer batteries.

    $69.00
  • Fence & Battery Digital Tester
    Fence Connectors and Accessories

    Fence & Battery Digital Tester

    Item #200010 - In Stock

    All-in-one fence tester checks the voltage of energizers, fences and 12V batteries. Simplify electric fence troubleshooting with one device!

    $38.00
  • Warning Sign
    Fencing

    Warning Sign

    Item #346000 - In Stock

    Let passersby know that your fences are electrified with this easy-to-read electric fence warning sign.

    $2.50
Average Rating: ★ ★ ★ ★ ★ 5 out of 5
Number of reviews: 22 customers reviewed this product.
Recommended: 22 out of 22 said they would recommend this product to a friend.

Write a Review

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Speedrite AN90 Energizer
★ ★ ★ ★ ★
June 11, 2019

Sheryl M from Missouri

This is my second unit. I LOVE how well it works on my pastured poultry pens. Easy and effective. I use the D cell batteries and they typically last over a month on the “slow” setting.

Speedrite AN90 Energizer
★ ★ ★ ★ ★
November 19, 2018

Mary J from Ohio

Purchased this to use with electric net fence in an area without electricity. It worked very well to keep our Rams separated during breeding season.

We are happy to hear that this energizer is working well for you and your flock. However, we find the SpeedRite AN90 is best used for short, weed free cattle and horse fences. The output of .16 joules is insufficient to properly electrify netting due to the likelihood of high grass contact. — Premier
Speedrite AN90 Energizer
★ ★ ★ ★ ★
July 31, 2017

Sheryl M from Missouri

LOVE THIS. It is exactly what I needed to easily protect my pastured poultry pens. Works great.

Speedrite AN90 Energizer
★ ★ ★ ★ ★
July 13, 2016

Emily C from California

Just set this up to keep our horses and mini horses out of the orchard when the apples are ripening. So easy and works great. I'm going to use the same set up for camping -- best I've seen. The built in grounding rod isn't long but I poured a bucket of water on the soil and it's working fine.

Speedrite AN90 Energizer
★ ★ ★ ★ ★
May 30, 2016

Steven S from Arkansas

We use the fence for sheep in our back yard. It works great! I can't imagine how well 2-"D" cell batteries can do such a good job! It didn't take the sheep and our dog long to find out what it was! Be sure to buy the drive-able posts! I use a rubber mallet for easy installation.

« Previous 1 2 3 4 5 Next »

About Conductivity

Conductivity measures the amount of electrical current a material can carry. The opposite measure is known as resistance.

Tinned Copper Superconductor

Many of Premier’s electric net fences feature a green and white superconductor that has both stainless steel and tinned copper filaments for optimal conductivity.

These “premium” nets are 10 times more conductive (38 ohms per 1000') than “basic” nets offered by our competitors. This enables the electric pulse to travel much farther and be less affected by weed contact.

Customers who are unhappy with netting are often those who’ve chosen nets from China or their farmstore equivalents.

Types of Line Posts

Line posts are built into the net. Three options are available.*

Line Posts Compared
  1. Single Spike (SS)
    The best choice, unless your soils are always soft or very hard.
  2. Double Spike (DS)
    Posts allow you to push in the spikes with your foot. When soil is hard or rocky, double spikes are more difficult to install and remove.
  3. Drivable Posts (DP)
    Allows use of a mallet or dead blow hammer for installing posts in dry, hard or rocky soil. Features a “spike stop” for extra support and internal fiberglass ribs for added strength.

Tip: To insert a line post into frozen or hard soil, use a power tool to drill pilot holes.

* Not all fences have all line post options.

About Positive/Negative (Pos/Neg) Nets

Is your area dry?

Conventional electrified fence systems rely on soil moisture to be effective. However, not all areas have the required moisture.

Dry soil increases resistance—a weaker, less effective pulse occurs that does not deter animals.

To overcome this, Pos/Neg nets* are wired to allow the use of every other horizontal strand as an extension of the ground terminal. Because half the strands are connected to the ground terminal or ground rod, reliance on soil moisture is reduced. A PowerLink must be purchased separately to make the secondary ground connection.

How it works…

In order to receive a shock, the animal must touch both a positive (hot) and negative (grounded) strand at the same time. This will deliver more pain to the animal than an all hot net (Pos/Pos) because moisture in the soil is not required to complete the circuit.

Pos/Neg fences can be converted to Pos/Pos in moist conditions. Remember, all fences must be kept free of vegetation.

* Not all fences have Pos/Neg options.

Line Post Spacing

“Plus” nets—6'8" spacings between built-in line posts*

Line Post Spacing

Standard nets—10' or 12' spacings between built-in line posts*

* Spacings are approximate.
Distance between built-in line posts may vary by product.

Essential Energizer Advice

  • Buy a larger energizer than necessary. When the fence pleases, most folks will buy more fence—and need additional output.
  • Use a low-impedance intermittent pulse energizer.
  • Use a fence tester to check the voltage often.
  • Use enough ground rod(s)—included with our energizer kits.
  • Don’t allow your lead acid battery to discharge below 40%.
  • Use insulated wire that is designed for electric fences.
  • Always connect the fence to an energizer, not an outlet.
  • Visit this link for answers to other common energizer questions.

Two Basic Types

  1. All-in-one Solar
    • Solar units are very portable.
    • Because they need a battery, these units are more costly to purchase and operate than plug-in units.
    • Batteries are less effective in cold temperatures (deplete faster).
    • Most farmstore solar units are too weak, in joules of output, to properly energize netting. That’s why we designed our own.
  2. Plug-in & Battery
    • Least cost to purchase and operate per joule of output.
    • Best for fences exposed to heavy vegetation.
    • Cold temperatures do not affect performance.
    • Recommended for whole-farm systems, but can be complex to install. Higher output requires more ground rods, underground cables, multiple output terminals, etc.

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Dan Morrical

Dr. Dan Morrical, Ph.D.
Premier 1 Supplies

Dan Morrical joined the Iowa State University staff in 1984 as Extension Sheep Specialist after completing his doctorate degree at New Mexico State University. He held the rank of Full Professor as of July 1, 1995 and retired from full-time teaching in 2017.

While at Iowa State University, Dr. Dan Morrical was responsible for educational programs in all areas of sheep production, ranging from nutrition, genetics, marketing and management. Research areas focused on applied projects in the areas of nutrition, forage utilization, genetics, out-of-season breeding and lamb survival.

Dr. Morrical has been heavily involved in providing educational resources to the sheep industry. He has authored over 30 extension fact sheets, ration balancing software programs, grazing videos and co-authored the nutrition chapter of the SID Handbook with Dr. Margaret Benson from Washington State University.

Dr. Morrical now serves as Premier’s on-staff small ruminant nutritionist and sheep production advisor. Most recently, he’s introduced a line of “GOLD FORMULA” mineral premixes under The Shepherd’s Choice® brand, aimed to maximize hoof health and immunity.

Braided vs. Twisted

Braiding instead of twisting the horizontals increases the frequency of metal filaments on the outside of the strand.

Braided vs. Twisted Electric Net Fences

What’s the benefit?

  1. More metal is exposed on the outside of the strand. This enables improved animal to conductor contact. The electric pulse is better able to travel from the fence and into the animal, resulting in a memorable shock.
  2. A tighter, braided weave results in fewer snags when carried or pulled through pastures, reducing frustration.

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