1. Introduction
The Gallagher S40 Solar Fence Charger is a portable, fully integrated solar energizer designed for electric fencing applications. It provides reliable power for containing livestock, poultry, and protecting gardens from wildlife. This unit delivers 0.4 joules of stored energy, capable of powering up to 25 miles of clean fence or 5 miles of multi-wire setups. This manual outlines the proper installation, operation, and maintenance procedures to ensure optimal performance and longevity of your S40 unit.

Image 1.1: The Gallagher S40 Solar Fence Charger, a compact and portable unit with an integrated solar panel.
2. Safety Information
Always observe the following safety precautions when installing, operating, or maintaining your electric fence system:
- Do not connect the energizer to any other power source than specified.
- Keep children away from electric fences.
- Avoid touching the fence with your head, neck, or torso.
- Do not install electric fences near power lines or communication cables.
- Ensure proper grounding of the energizer.
- Regularly inspect the fence for damage or shorts.
- Disconnect the energizer before performing any maintenance on the fence line.
- This product is designed for animal control and exclusion. Misuse can result in injury.
3. Package Contents
The Gallagher S40 Solar Fence Charger package includes the following components:
- S40 Energizer/Charger unit with integrated solar panel
- Rechargeable 6V battery (internal)
- Fence leadset (red and green alligator clips)
- User guide (this manual)

Image 3.1: Visual representation of the S40 unit and its included accessories: energizer, solar battery (internal), leadsets, and user guide.
4. Setup and Installation
Proper installation is crucial for the S40's performance. Follow these steps for optimal setup:
4.1 Mounting the Energizer
The S40 is designed for versatile mounting. It can be easily attached to T-posts, wood posts, or flat surfaces. Ensure the solar panel faces direct sunlight throughout the day for maximum charging efficiency. The unit features 360-degree mounting capability to assist with correct orientation.

Image 4.1: The S40 energizer mounted on a fence post, demonstrating its portability and ease of installation in various field conditions.
4.2 Connecting to the Fence
- Fence Connection: Use the red alligator clip from the provided leadset to connect the energizer's positive (+) terminal to the electric fence wire. Ensure a secure connection to the live wire.
- Ground Connection: Use the green alligator clip from the leadset to connect the energizer's negative (-) terminal to a dedicated ground rod. The ground rod should be at least 3 feet long and driven fully into moist soil for effective grounding.
- Fence Line: The S40 is suitable for use with Poly Wire and Turbo Wire. Ensure your fence line is clear of vegetation to prevent shorts and maintain optimal voltage.

Image 4.2: The S40 unit installed, highlighting the solar panel and its simple connection points for quick setup.
5. Operation
Once installed and connected, the S40 operates automatically. The integrated solar panel charges the internal rechargeable battery during daylight hours, providing continuous power to the fence.
- Power Indicator: A flashing indicator light on the unit confirms that the energizer is working and delivering pulses to the fence.
- Battery Life: The S40 features battery-saving technology, allowing it to run for up to 3 weeks without direct sunlight, making it ideal for remote or off-grid locations.
- Adaptive Energy Control: The unit incorporates adaptive energy control to optimize power output and battery usage.

Image 5.1: The S40 operating in a field, illustrating its weather-resistant design and reliable performance even in challenging conditions.
6. Maintenance
Regular maintenance ensures the longevity and effectiveness of your S40 Solar Fence Charger:
- Solar Panel Cleaning: Periodically clean the solar panel surface with a soft, damp cloth to remove dust, dirt, or debris that may obstruct sunlight and reduce charging efficiency.
- Fence Line Inspection: Regularly check the fence line for vegetation growth, broken wires, or damaged insulators that could cause shorts and reduce fence voltage. Trim vegetation as needed.
- Battery Check: While the battery is internal and maintenance-free under normal operation, ensure the unit receives adequate sunlight to keep it charged. Prolonged periods without sun can deplete the battery.
- Unit Inspection: Inspect the energizer unit for any physical damage or loose connections. The S40 features a tough, water-resistant case and built-in lightning protection, but extreme conditions may still cause wear.
7. Troubleshooting
If your S40 Solar Fence Charger is not performing as expected, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| No flashing indicator light / No power to fence |
|
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| Low voltage on fence |
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8. Specifications
| Feature | Detail |
|---|---|
| Brand | Gallagher |
| Model Number | G345404 (S40) |
| Stored Energy | 0.4 Joules |
| Fence Length (Clean) | Up to 25 miles |
| Fence Length (Typical) | Up to 5 miles |
| Power Source | Solar Powered |
| Battery Type | Rechargeable 6V Sealed Lead Acid (internal) |
| Maximum Voltage | 7 Kilovolts |
| Material | Solar panel, rechargeable battery |
| Item Weight | 1 pound (approx. 16 ounces) |
| Product Dimensions | 8.5 x 12 x 11 inches |
| Special Features | Solar Powered, Built-in lightning protection, Adaptive energy control, Water-resistant case |

Image 8.1: The S40 unit showcasing its robust design and key features for reliable fence energizing.
9. Warranty and Support
The Gallagher S40 Solar Fence Charger is backed by a full 3-year manufacturer's warranty, covering defects in materials and workmanship under normal use.
For technical assistance, warranty claims, or further information, please contact Gallagher customer support. Refer to the official Gallagher website for the most current contact details.
Manufacturer: Gallagher Store





