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PrimaShock® 4 Fence Energizers & Kits

Product Details

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★ ★ ★ ★ ★ (24) Read reviews »

Premier’s new budget-friendly PrimaShock® electric fence energizers combine high joule output with dual power source options (battery or plug-in). They really impressed us during testing trials on employee farms.

Features:

  • Low cost per joule: 4.0J output
  • Can be used as a plug-in (AC) energizer, or as a battery (DC) energizer
  • 2 operating modes to suit your situation
  • LED display for output voltage and battery condition
  • Integrated Max Output/Off/Energy Saver switch

Plug unit into a 110V wall outlet, or connect to an external 12V battery. (Connectors included for both. See Specifications below.)

Comparison chart with scales graphicView a comparison chart »

⚠ California Residents: Proposition 65 Information

  • PrimaShock® 4 Energizer

    Item #113001 | Weight 5.20 lbs
    In Stock
    $159.00
  • PrimaShock® 4 Energizer Plug-in Kit

    Item #113002 | Weight 20.95 lbs
    In Stock
    $259.60
  • PrimaShock® 4 Energizer Battery Kit

    Item #113003 | Weight 17.60 lbs
    In Stock
    $239.10
Videos & Data
Accessories
Replacement Parts
Reviews (24)
Installing a Plug-in Energizer Play
Installing a Plug-in Energizer

Instructions/Diagrams:

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

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Common Uses

Electric fences, when properly energized, are an effective tool to contain livestock or protect against coyotes, stray dogs, bears, foxes and keep out deer, raccoons and rabbits from garden/orchard areas.


Specs

  Energizer Only Plug-in Kit* Battery Kit*
Item # 113001 113002 113003
PrimaShock® 4 Energizer ✔ ✔ ✔
(2) Ground Rods (galvanized) 6 ft 6 ft
(2) Ground Rod Clamps ✔ ✔
MaxiShock Insulated Cable 100' roll 10' roll
Wiring Harness ✔ ✔
110V AC Adapter ✔ ✔ ✔
DC Battery Leads ✔ ✔ ✔
*Kits include all the parts and pieces that folks new to electric fence normally need to make the fence operational.

Should Power...**

  • 4 miles of 3 strand cattle fence
  • 2 miles of a 5-7 strand sheep fence
  • 23 rolls of 164' sheep/goat nets
  • 12 rolls of 164' poultry nets
**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

  • Requires a grounding system. Inadequate grounding is the most common failure in an electric fence system. We recommend 12 ft. of grounding for this energizer.
  • 12V battery draw is 200 milliampere (mA) per hour. With this energizer, a 12V, 100 ampere hour deep-cycle battery will last 13 days. (Assumes 60% drawn down between charges.)
  • To operate as a solar energizer, run the unit as a battery unit (DC) and attach a solar panel to charge the battery. (20–60 watt panel recommended.)

Energizer Specifications

  • 4.0 released joules
    • 4.0 joules in moist soils
    • 0.60 joules in dry soils
  • 12V DC draw: 150-300 mA/hr
  • 110V draw is 2.7 watt per hour
  • 10"W x 7"H x 4"D
  • 5' AC power cord
  • Integrated Max Output/Off/Energy Saver switch
  • LED display for output voltage and battery condition. (Replace or charge battery when battery voltage drops below 12.2V)
  • 2 operating modes:
    • Max Output—pulses every 1.5 seconds
    • Energy Saving—output power is reduced 60%

AC adapter and DC leads included with all PrimaShock 4 units:
  • 110V Adapter/Charger
    • Operates the energizer as a 110V unit when near a wall outlet
  • 12V DC Leads
    • To connect energizer to an external battery (batteries sold separately)


Installation

To use the energizer as a plug-in unit:

The energizer can be mounted either inside or outside of a building. The energizer must be mounted vertically. If placing outside, protect the energizer from direct rainfall.
  1. Connect an insulated cable (stripped back 1–2" on ends) to the fence terminal on energizer, run the cable to the fence line and connect, or use the positive part of the wiring harness.
  2. Then run a second length of cable from the ground terminal (with ends stripped again) on the energizer to the ground rod(s), or use the negative part of the wiring harness.
  3. Secure to ground rod(s) with a clamp.
  4. Plug the energizer directly into an outlet and test fence. Do not use an extension cord as it may cause a decrease in voltage and expose the unit to the elements.

To use the energizer as a battery unit:

  1. Attach wiring harness to energizer.
  2. Attach the bare end of the wire with the red clip to the fence terminal of the energizer. Attach the red alligator clip to the fence.
  3. Attach the bare end of the wire with the green clip to the ground terminal of the energizer. Attach green alligator clip to the ground rod(s).
  4. Connect the energizer to the battery. (Batteries sold separately.)
  5. Insert battery adapter into the energizer. Attach red alligator clip from the adapter to the red “+” terminal of the battery.
  6. Attach black alligator clip from the adapter to the black “–” terminal of the battery.

Unit indicator light should flash and a tic-tic sound will be heard. If the indicator light doesn’t flash, then the unit/battery should be checked.

Kits include the components and hardware to build your own solar-powered electric fence energizer

New! DIY Solar Energizer Kits

For folks willing to apply a little elbow grease, building your own solar fence energizer may be a good solution.Kits include:
  • PrimaShock fence energizer
  • 50W (or 90W) solar panel with regulator
  • 12 volt, 44 amp hr SLA battery
  • Support box and solar panel brackets
  • Ground rods, insulated wire and clamps
  • Digital fence tester


Precautions

Make sure the energizer is turned off before working on the fence or the energizer.

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.
  • If using the energizer as a battery unit, do not charge the battery while the energizer is connected to the battery.


Troubleshooting

You’ll need an electric fence tester (optional, see Accessories) 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


Warranty

3-year warranty covers 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.

  • 4 joule DIY Solar Energizer Kit, 50 watt panel
    Energizer Solar Panels and Accessories

    4 joule DIY Solar Energizer Kit, 50 watt panel

    Item #113004 - In Stock

    Build your own 4- or 8-joule solar-powered electric fence charger. Kit includes all the components to energize livestock fences without access to 110V power.

    $721.00
  • Ground Rod, Galvanized, 6'
    Fence Connectors and Accessories

    Ground Rod, Galvanized, 6'

    Item #151000 - In Stock

    Complete the circuit of your electric fence with galvanized grounds. No corrosion unlike copper rods.

    $22.00
  • Stainless Steel Clamp
    Fence Connectors and Accessories

    Stainless Steel Clamp

    Item #151800 - In Stock

    Stainless steel hose clamp. Firmly holds negative leads from the energizer to the ground rod.

    $1.30
  • 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
  • Energizer Support Box
    Energizer Solar Panels and Accessories

    Energizer Support Box

    Item #134200 - In Stock

    Build your own portable electric fence system for rotational grazing. Durable galvanized housing for energizer and battery.

    $68.00
  • Sealed Lead Acid Battery, 12V, 44 amp hr
    Energizer Solar Panels and Accessories

    Sealed Lead Acid Battery, 12V, 44 amp hr

    Item #121700 - In Stock

    12V sealed lead acid (SLA) batteries for use with electric fence energizers. 500-1000 rechargeable cycles. AGM construction.

    $120.00
  • Solar Panel, 50 watt with 10 amp regulator
    Energizer Solar Panels and Accessories

    Solar Panel, 50 watt with 10 amp regulator

    Item #147001 - In Stock

    High-efficiency glass solar panels. Choose from 10W up to 90 watts. Monocrystalline photovoltaic cells are ideal for charging 12V batteries.

    $289.00
  • 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
  • 12V DC Leads for IntelliShock, HotShock and PrimaShock Energizers
    Fence Connectors and Accessories

    12V DC Leads for IntelliShock, HotShock and PrimaShock Energizers

    Item #112002 - In Stock

    Attach to Premier-branded electric fence energizers to adapt them to run on battery (12V DC) power.

    $9.26
Average Rating: ★ ★ ★ ★ ★ 4.7 out of 5
Number of reviews: 24 customers reviewed this product.
Recommended: 24 out of 24 said they would recommend this product to a friend.

Write a Review

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PrimaShock® 4 Fence Energizers & Kits
★ ★ ★ ★ ★
June 16, 2024

Jason W from Virginia

Works great and is affordable.

PrimaShock® 4 Fence Energizers & Kits
★ ★ ★ ★ ★
May 29, 2024

Mark R from Wisconsin

Works as expected, and has a better pulse frequency than the Patriot energizer. I wish I’d had bought one of these for my other pasture last year.

It’s only been in use for 2 weeks now, so not much to go off of for life, etc…

PrimaShock® 4 Fence Energizers & Kits
★ ★ ★ ★ ★
July 17, 2023

David L from Pennsylvania

Worked as expected.

PrimaShock® 4 Fence Energizers & Kits
★ ★ ★ ★ ★
June 13, 2023

Justin Y from Colorado

Shockingly simple, affordable and effective!

PrimaShock® 4 Fence Energizers & Kits
★ ★ ★ ★ ★
May 2, 2023

Bryan C from Indiana

Well built. More features than I needed, but for the price point it’ll be hard to beat.

« 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.

Shipping Zones

Map of Shipping Zones
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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⚠ WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.