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  • Home
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  • Energizers

Agri 8 Lithium Solar Fence Energizer

Product Details

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★ ★ ★ ★ ★ Read reviews »

New! Portable all-in-one Agri 8 arrives ready to power electric fences day and night.

Features an internal lithium battery and high-efficiency solar panel. 0.68 output joules effectively contains sheep, goats, poultry, swine, cattle, horses and other livestock, while protecting them from ground-based predators.

✔ Lithium-powered
Lithium batteries charge much faster (up to 8X vs. lead-acid) and provide up to 95% of their rated capacity, regardless of the rate of discharge
✔ Lightweight and portable
“Plug-and-play” simplicity—just mount on the included support spike (or a standard T-post), drive in a ground rod and attach the leads
✔ 3-year warranty*
Covers all parts and labor expenses caused by defective parts and lightning surges. 6-month warranty for lithium batteries.

  • Agri 8 Lithium/Solar Energizer

    Item #113620 | Weight 12.00 lbs
    In Stock
    $349.00
    $249.00
Data
Accessories
Replacement Parts
Reviews

Instructions/Diagrams:

  • Agri 8 Instruction Manual [4 MB]
  • Energizer FAQs [3 MB]
  • Fence FAQs [10 MB]

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Benefits

A solar powered energizer for electric fences to contain sheep, goats, poultry, swine, cattle and horses. Effective against predators such as coyotes, stray dogs, bears and foxes.

Can also be used with garden and wildlife fences to keep out deer, raccoons, woodchucks, rabbits, opossums and skunks.

Solar powered energizers are a popular choice when 110V power is not easily accessible. Attached solar panel will recharge the battery on sunny days.


Specs

In the box:

  • 0.68 output joule energizer
  • 10 watt solar panel
  • Internal lithium iron phosphate (LiFePO4) battery; 4.6Ah capacity
  • (2) key tags, for turning the unit on/off
  • Support spike
  • Wiring harness

The support spike (included) can function as a ground rod. However, we recommend adding an 18" T ground rod (or longer) for optimal performance across a wider range of fence conditions. The Agri 8 can also be mounted on a standard T-post.

A 110V Plug-in Recharger (Item #113629) is available for those that need it.

Should power…

  • 3–5 rolls of electric netting depending on soil conditions and vegetation
  • 1-1/2 miles of 3 strand cattle fence
  • 1/2 mile of 5–7 strand sheep fence


Common Questions

There’s no switch, how do I turn the energizer on/off?
The unit includes two key tags. Position the tag over energizer’s display panel to toggle on/off. Keep the tag on a key chain, or attach to the energizer via the solar panel’s built-in magnet.
How often do lithium iron phosphate (LiFePO4) batteries need to be replaced?
Sealed lead-acid batteries (SLA) should last 3–5 years with proper maintenance. However, LiFePO4 batteries can provide 8–10 years of use, exceeding the lifespan of an SLA battery.
Does extreme cold/hot temperature affect performance?
The ambient temperature will impact the performance of LiFePO4 batteries. Prolonged exposure to extreme cold (≤14°F) or extreme heat (≥113°F) can lead to decreased capacity and risk of thermal runaway.
Do I need to maintain the battery during periods of storage?
Unlike SLA batteries which self-discharge when in storage, LiFePO4 cells retain more of their charge when dormant. Ensure your battery is partially charged (40–60%) before storing it. Routine trickle charging is not needed.
Lithium Iron Phosphate (LiFePO4) Discharge Curve
LiFePO4 batteries have a relatively flat discharge curve. This means a larger % of energy stored in the battery can be used to power the energizer. Whereas the voltage of a lead acid battery drops significantly—only 60% of its capacity can be used.
Why doesn’t the Agri 8 come with a 110V battery recharger?
Because it’s not needed for most applications. LiFePO4 batteries recharge quickly from the attached solar panel. A lithium battery charged to only 20% will output 12.8V—the same as a fully charged SLA battery. In full sun, it only takes a few hours to recharge a battery to operational status.
Which direction should I point the solar panel?
Position the energizer so that the solar panel faces due south. This will allow the panel to receive the maximum amount of sunlight possible, even during the low-light days of winter. Consider the sun’s movement throughout the day and avoid placing the unit where it may be covered by shadows from trees, bushes, tall grass, buildings or fence posts.


How to Use

Refer to the Operation Manual (PDF download above) for installation instructions.

Always check the voltage to ensure the fence is properly electrified before introducing animals.


Precautions

For livestock use only.

  • 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.
  • Ensure the solar panel is facing due south and avoid placing the unit where it may be covered by shadows from trees, bushes or tall grass.
  • Regularly remove all debris from the solar panel.

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.


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 fence 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 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.

6-month warranty for lithium batteries.

  • 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
  • T Ground Rod, 18" x 1/2"
    Fence Connectors and Accessories

    T Ground Rod, 18" x 1/2"

    Item #151220 - In Stock

    Provide a conductive ground circuit for your electric fence. Conductive t-grip is easy to install and remove.

    $10.00
  • Fence Meter
    Fence Connectors and Accessories

    Fence Meter

    Item #200021 - In Stock

    Wireless hand-held meter to measure electric fence voltage, current and the direction of possible faults along the fence line.

    $105.00
  • Lightning Diverter
    Energizer Solar Panels and Accessories

    Lightning Diverter

    Item #156320 - In Stock

    Protect your electric fence energizer from lightning strikes. High-voltage lightning arrestor redirects surges to the ground.

    $13.00
  • Live Fence Indicator
    Fence Connectors and Accessories

    Live Fence Indicator

    Item #133515 - In Stock

    For instant reassurance that your fence is working. Clip to your fence line and watch for the flash when you pass by. No batteries required.

    $45.00
  • PowerLink™ 4.0, 30" long
    Fence Connectors and Accessories

    PowerLink™ 4.0, 30" long

    Item #335500 - In Stock

    Make instant, in-field connections between electric fences without turning off the energizer. Simple to use and effective.

    $5.50
  • 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
  • Replacement Battery for Agri 8 energizer
    Fencing

    Replacement Battery for Agri 8 energizer

    Item #113621 - In Stock

    Replacement parts and components for Nemtek's Agri 8 electric fence energizers.

    $55.75
  • Replacement Solar Panel Bracket for Agri 8 energizer
    Fencing

    Replacement Solar Panel Bracket for Agri 8 energizer

    Item #113623 - While supplies last!

    Replacement parts and components for Nemtek's Agri 8 electric fence energizers.

    $7.25
  • Replacement PCB Board for Agri 8 energizer
    Fencing

    Replacement PCB Board for Agri 8 energizer

    Item #113624 - In Stock

    Replacement parts and components for Nemtek's Agri 8 electric fence energizers.

    $49.30
  • Replacement Transformer for Agri 8 energizer
    Fencing

    Replacement Transformer for Agri 8 energizer

    Item #113625 - In Stock

    Replacement parts and components for Nemtek's Agri 8 electric fence energizers.

    $44.00
  • Replacement Key Tag for Agri 8 energizer
    Fencing

    Replacement Key Tag for Agri 8 energizer

    Item #113627 - In Stock

    Replacement parts and components for Nemtek's Agri 8 electric fence energizers.

    $6.00
  • Replacement Support Stake for Agri 8 energizer
    Fencing

    Replacement Support Stake for Agri 8 energizer

    Item #113628 - In Stock

    Replacement parts and components for Nemtek's Agri 8 electric fence energizers.

    $10.70
  • Replacement Battery Recharger for Agri 8 energizer
    Fencing

    Replacement Battery Recharger for Agri 8 energizer

    Item #113629 - In Stock

    Replacement parts and components for Nemtek's Agri 8 electric fence energizers.

    $59.50
Average Rating: ★ ★ ★ ★ ★ 5 out of 5
Number of reviews: 3 customers reviewed this product.
Recommended: 3 out of 3 said they would recommend this product to a friend.

Write a Review

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field tested badge
We tested these units at our farms (located in southeast Iowa) throughout the winter of 2023. During Nov–Feb, the outside temperature ranged from -17°F to 43°F. We expected the extreme cold to adversly effect the energizer. But were surprised when our test units continued to function, even during a major blizzard. When the energizer indicated a low state of charge, the batteries quickly regained a usable charge by mid-morning.
Agri 8 Lithium Solar Fence Energizer
★ ★ ★ ★ ★
May 6, 2025

Linda B from Virginia

This solar panel is powerful, but keep the key close because you can’t touch the grips without turning the electricity off. I use it for my permanent fence rather than the fence I use for rotational grazing.

Agri 8 Lithium Solar Fence Energizer
★ ★ ★ ★ ★
January 24, 2025

Carolyn H from California

This is the first solar energizer I have used. It works great and is easy to move around. It is lightweight enough to move around easily.

It is very convenient to be able to set the energizer up anywhere outside and not worry about weather damage.

At first, I was confused by the tag that is used to toggle it on/off and change modes, but it is still pretty simple.

I liked this one so much I bought a second one.

Agri 8 Lithium Solar Fence Energizer
★ ★ ★ ★ ★
December 22, 2024

Eric T from New York

It fits on the existing post and puts out a lot of power. Hope it lasts a few years.

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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