Introduction
The Gallagher S12 Solar Electric Fence Charger is a compact, portable, and highly efficient solar-powered energizer designed for small-scale electric fencing applications. It is ideal for hobby farmers, gardeners, and those needing to secure small livestock enclosures, garden perimeters, or backyard poultry setups. Featuring advanced solar lithium technology, the S12 provides reliable off-grid power, ensuring continuous fence operation even in remote locations without access to 110V outlets. Its rugged, weatherproof design ensures durability in various environmental conditions.
This manual provides detailed instructions for the safe and effective installation, operation, and maintenance of your S12 Solar Electric Fence Charger. Please read it thoroughly before use to ensure optimal performance and longevity of your device.
Safety Information
Always observe the following safety precautions when installing or operating the S12 Solar Electric Fence Charger:
- Do not connect the energizer to any other power source than its integrated solar panel.
- Ensure proper grounding as described in the setup section to prevent electrical hazards and ensure effective operation.
- Keep the energizer and fence lines clear of vegetation and debris to maintain optimal performance and prevent short circuits.
- Avoid touching the fence line directly when the energizer is active. Use insulated handles or tools when working with the fence.
- Do not immerse the energizer in water. While weatherproof, it is not designed for submersion.
- Keep out of reach of children and pets.
- In case of lightning, disconnect the energizer from the fence line to prevent damage.
Setup
Package Contents
Before beginning installation, verify that all components are present:
- Gallagher S12 Solar Electric Fence Charger with integrated solar panel and internal lithium battery
- Fence leadset (included electric fencing clip hot wire)
- User guide (this document)

Image: Components included with the Gallagher S12 Solar Electric Fence Charger.
Choosing a Location
Select a location for the energizer that receives maximum direct sunlight throughout the day, especially during peak daylight hours. Avoid shaded areas from trees, buildings, or other obstructions. The S12 is designed to be rugged and weatherproof, suitable for outdoor use in various conditions.
Mounting the Energizer
The S12 features a unique post mounting system that protects the energizer from stock and rising water, while preventing grass from shielding the solar panel. It mounts directly to an unpainted metal rod or a ring-top post (up to 0.5" thick), which is not included. The mount itself acts as an earthing connection point for fast setup anywhere.

Image: The S12 mounted on a post, demonstrating its secure and reliable placement.
The S12 offers multiple mounting options to suit your fencing solution:
- Y Steel Post: Securely attach to a Y-shaped steel post.
- T Steel Post: Mount onto a T-shaped steel post.
- Wood Post: Can be affixed to a wooden fence post.
- Ground Rod: Directly mounts to a ground rod, which also serves as the earthing connection.
- Ring Top Post: Attaches to a ring-top post for easy portability.

Image: Various mounting options for Gallagher solar energizers.
Grounding
The S12 has a built-in earthing system. When mounted directly to an unpainted metal rod or ring-top post, the mount itself acts as the earthing connection point. Ensure the chosen post or rod is driven sufficiently into the ground to provide a good earth connection. A good earth connection is critical for the effective operation of your electric fence.
Connecting to the Fence
Once the energizer is securely mounted and grounded, connect the included electric fencing clip (hot wire) from the energizer to your fence line. Ensure a secure connection to prevent power loss.

Image: Connecting the energizer to the fence line.
Operating the S12
Powering On/Off
The S12 is designed for low-maintenance, set-and-forget operation. Once mounted and connected, it will automatically begin charging and operating when exposed to sufficient sunlight. There is a power button on the front of the unit. Press it to turn the unit on or off.
Indicator Lights
The S12 features indicator lights on its front panel to provide status information:
- Green Light: Indicates the energizer is operating correctly and delivering pulses to the fence.
- Red Light: Indicates a low battery condition or a fault. If the red light is on, check the battery charge and the fence line for shorts.

Image: Front view of the S12 showing indicator lights.
Solar Charging
The integrated lithium battery stores weeks of energy, even in low sunlight conditions. The high-efficiency solar panel continuously charges the battery during daylight hours. This allows the energizer to deliver dependable power for electric fencing in remote pastures or off-grid homesteads.

Image: The S12 demonstrating its solar lithium technology.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your S12 Solar Electric Fence Charger.
Cleaning
Periodically wipe the solar panel with a soft, damp cloth to remove dust, dirt, or debris that may accumulate and reduce charging efficiency. Do not use abrasive cleaners or solvents.
Battery Care
The S12 uses a long-lasting lithium battery. No manual charging or battery swapping is typically required under normal operating conditions with sufficient sunlight. If storing the unit for an extended period, ensure it is fully charged before storage and recharge it every few months to maintain battery health.
Checking Connections
Regularly inspect all connections, including the fence lead and the grounding point, to ensure they are secure and free from corrosion. Loose or corroded connections can reduce the effectiveness of your fence.
Vegetation Management
Keep the fence line clear of excessive vegetation. Tall grass or weeds touching the fence can cause shorts, reducing the energizer's output and draining the battery.
Troubleshooting
If your Gallagher S12 Solar Electric Fence Charger is not performing as expected, refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No pulse/Green light off | Insufficient sunlight Low battery Energizer turned off | Relocate to a sunnier spot. Allow time for charging (several days of good sun). Press the power button to turn on. |
| Red light on (low battery) | Prolonged cloudy weather Excessive fence load (shorts) | Ensure maximum sun exposure. The battery stores weeks of energy, but prolonged lack of sun will deplete it. Check fence line for shorts (vegetation, broken insulators). |
| Weak shock/Poor fence performance | Poor grounding Fence shorts Loose connections | Ensure ground rod is deep and connections are secure. Clear vegetation from fence line. Inspect insulators. Tighten all fence connections. |
| Energizer not charging | Solar panel obstructed/dirty Internal battery issue (rare) | Clean solar panel. Ensure no shade. If issues persist after troubleshooting, contact Gallagher support. |
If you continue to experience problems after attempting these solutions, please contact Gallagher customer support for further assistance.
Specifications
| Feature | Specification |
|---|---|
| Model Number | G349414 |
| Stored Joule Energy | 0.12 Joules |
| Fence Coverage (Single Wire, Ideal) | Up to 4 miles |
| Fence Coverage (Multi-wire/Vegetation) | Up to 0.6 miles |
| Power Source | Solar (integrated panel) |
| Battery Type | Lithium Ion (included) |
| Material | Alloy Steel (housing) |
| Item Weight | 2.4 Pounds |
| Product Dimensions (L x W x H) | 5.7 x 5 x 6.7 inches |
| Included Components | Post Mount |
| UPC | 644493349415 |
Warranty
The Gallagher S12 Solar Electric Fence Charger comes with a manufacturer's warranty. Please refer to the warranty documentation included with your purchase for specific terms, conditions, and duration. Retain your proof of purchase for any warranty claims.
Support
For technical assistance, product inquiries, or warranty support, please visit the official Gallagher website or contact their customer service department. Contact information can typically be found on the product packaging or the Gallagher brand store online.
Online Resources:
- Gallagher Official Website: www.gallagher.com
- Gallagher Amazon Store: Gallagher Store on Amazon





