SPEEDRITE 12000i Dual Powered 110V/12V Energizer | 12 Joule | Free U.S.A. Shipping and Fence Tester

Speedrite 12000i AC/DC Electric Fence Charger

110V AC OR 12V Battery Powered Unigizer 

FREE U.S.A. SHIPPING TO THE LOWER 48 STATES  

FREE SINGLE LIGHT FENCE TESTER INCLUDED*

REMOTE SOLD SEPARATELY

The speedrite 12000i is our best-selling model for large to medium size farms.

The speedrite unigizer delivers a powerful punch and suitable for all types of livestock including cattle, horses, and small animals.

Fully featured. Remote control capable. Can be used in 110V, battery or solar power applications, providing convenient, versatile livestock control.

Powers up to 90 miles (500 acres) of fence
12 J maximum output energy (16 J stored energy)

• Cyclic Wave™ technology.  Provides a cleaner, more powerful pulse, maximizing the energy that travels down the fence for optimal stock control

• Bi-polar technology.  Enables the user to power a fence system to perform exceptionally well in dry, low conductive soil

• Solar compatible.  Electrify your fence with solar power by connecting solar panels to any Speedrite Unigizer. The solar panels charge the battery connected to the Unigizer, for reliable livestock control.  Recommended solar panel - 120 watt

• Remote capable (remote sold separately ST102).  Using a Speedrite fence remote (with remote capable Speedrite energizers) enables you to switch the energizer on or off from anywhere along the fence line.  This makes it easy to manage repairs and maintenance. Email us at valleyfarmsupply@aol.com to purchase a speedrite remote/fault finder.

• LCD Voltage Display.  Displays output voltage, battery voltage and earth voltage. LCD is backlit for viewing in poor light conditions

• Indicator lights.  Easy to read light bar display provides an instant measure of the Unigizer output voltage and battery condition for quick fence diagnostics. The LED display shows red when heavily loaded

• Battery saver.  Microprocessor technology automatically adjusts the output energy depending on the battery condition. This feature extends battery life and is particularly efficient when used in solar installations

• Day/Night sensor.  Automatically adjusts pulse speed to contain or exclude animals based on day or night conditions

• Large terminals.  Mounted on the front of the energizer casing for convenience, these large terminals are easily adjusted and accept up to two fence wires. The slotted terminals make inserting wires and getting a good connection easy

• Low Impedance.  Designed to deliver power to the end of the fence even under heavy load e.g. foliage, undergrowth

• Low Interference.  Cyclic Wave™ technology delivers outstanding fence performance and helps to minimize electromagnetic interference in line with international EMC standards

• Ground monitoring.  Indicates ground system problems by monitoring the level of voltage around the ground system

• Versatile mounting options.  Can be mounted on a wall, post or fence wire. Choose indoor or outdoor installation, depending on your fence location and power supply

Adjustable power and pulse speeds

Half voltage terminal.

Includes 110V power adaptor and battery leads.

Warranty information

3 year (includes lightning) Warranty

Get serious fencing power with the Speedrite 12000i AC/DC Electric Fence Charger

A top-performing energizer built to handle the demands of medium to large farms with ease.

Capable of powering up to 90 miles or 500 acres, this unit delivers a strong, consistent 12 joules of output energy (16 joules stored)—more than enough to control cattle, horses, and smaller livestock across expansive properties.

What makes the 12000i a standout is its versatility. Run it your way—on 110V AC power, a 12V battery, or a solar setup—giving you dependable performance whether you're near the barn or deep in remote pasture. It’s fully remote-capable (remote sold separately), so you can upgrade to fence-line control anytime.

Engineered for maximum efficiency, the 12000i features:

• Cyclic Wave™ technology for a cleaner, more powerful pulse that travels farther down the fence

• Bi-polar technology to maintain performance in dry, low-conductivity soil

• Low impedance output to push energy through heavy vegetation and fence load

Stay in control with smart diagnostics. The backlit LCD display shows fence voltage, battery status, and ground performance, while the LED indicator bar gives you instant visual feedback—even alerting you when the fence is under heavy load.

Built for real-world conditions, this energizer also includes:

• Battery-saving microprocessor technology to extend battery life

• Day/Night sensor that adjusts pulse speed automatically

• Ground monitoring system to detect faults quickly

• Large, easy-connect terminals for secure, hassle-free wiring

• Adjustable power and pulse speeds for customized operation

Installation is flexible—mount it on a wall, post, or fence wire, indoors or outdoors depending on your setup.

Bonus: Enjoy FREE U.S. shipping (lower 48 states) and a FREE single-light fence tester included, so you can monitor your system right out of the box.

Remote control/fault finder sold separately.

Backed by a 3-year warranty (including lightning damage), the Speedrite 12000i is a reliable, high-powered solution built to perform in tough conditions.

If you want a fence charger that combines strength, smart technology, and total flexibility, this is the one farmers trust to get the job done.

Technical Specifications

Physical Details

Old Part# 814086

New Part# 8800000-838