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Frequently Asked Questions
What is an electric fence, energizer?
An electric fence energizer is the power unit that sends regular short pulses of electricity through your fence wire. It converts mains, battery, or solar power into high-voltage pulses that deliver a safe but memorable shock to any animal that touches the fence. It is the core component of any working electric fence system.
What is the difference between a solar and an AC fence energizer?
A solar fence energizer runs entirely on sunlight and stored battery power, perfect for a remote location without mains access. An AC fence energizer plugs into a power outlet and delivers constant, reliable power. Solar units offer flexibility and portability, while AC units suit permanent installations where consistent power output is the priority.
What size energizer do I need for my electric fence?
Base the size of your energizer on the total length of the fence wire, not just the perimeter distance. A general rule is one joule of output per kilometer of fence wire. Also, factor in vegetation contact, such as weeds touching the fence, which reduces efficiency and demands more output from your electric fence energizer.
Can I use an AC/DC duo energizer with solar panels?
Standard AC/DC duo energizers can switch between mains power and internal battery; they are not typically for a direct solar panel connection. For solar integration, you need a dedicated solar electric fence energizer with a compatible solar input. Check the product specifications carefully before purchasing.
What Joule Rating Do I Need for My Electric Fence Energizer?
The joule rating determines how much power your energizer delivers to the fence. Low-output units of round 0.5 to 1 joules are suitable for small enclosures with short fence runs. Medium properties need 10 joules or more. When in doubt, choose a slightly higher rating than your minimum estimate; it gives you room to expand.