Description
Hammer Energizer EZ 640 – 5 Joule Electric Fence Energizer
The Hammer Energizer EZ 640 is a powerful and reliable electric fence energizer designed for urban, residential, commercial, agricultural, and industrial perimeter security installations. With a 5 Joule output, 8 Joules stored energy, and up to 10kV maximum output, the EZ 640 provides the high-voltage pulses required to energize a compatible electric fence system.
Designed as part of Hammer’s EZ range, the EZ 640 combines strong fence energizing performance with monitoring and alarm capabilities. It monitors the fence return voltage and can trigger an alarm when the voltage drops below the configured threshold, helping users identify potential fence faults or tampering.
Powerful 5 Joule Electric Fence Energizer
The Hammer EZ 640 delivers 5 Joules of output energy and has 8 Joules of stored energy, making it suitable for a wide range of perimeter electric fence applications. Its high-voltage output is designed to provide effective energization across compatible electric fence wire installations.
The energizer serves as the heart of an electric fence system, connecting to the live fence line and grounding system. For best results, it should be installed with suitable HT wire, posts, insulators, earth rods, and other compatible fencing accessories.
Intelligent Fence Monitoring
One of the major advantages of the Hammer EZ 640 Electric Fence Energizer is its high-voltage live-line monitoring capability. The unit monitors the fence return voltage on a single zone and provides an alarm when the voltage falls below the required threshold.
This monitoring function can help property owners and security personnel identify conditions such as damaged fencing, voltage loss, or possible tampering, allowing maintenance or security action to be taken promptly.
Gate Monitoring and Alarm Integration
The EZ 640 includes an auxiliary monitoring input that can be used for compatible gate monitoring applications. It also provides connections for external sirens and strobe lights, allowing audible and visual alarm devices to be integrated into the electric fence security system.
For installations requiring centralized security response, the energizer can also connect to an armed response radio where compatible equipment is used.
Battery Backup and Solar Compatibility
The Hammer EZ 640 is designed with battery backup capability to help maintain electric fence operation during mains power interruptions. The manufacturer specifies a 7Ah battery capacity and up to 12 hours of backup time under specified conditions. The EZ range is also solar enabled, providing additional flexibility for suitable installations.
This makes the EZ 640 particularly useful for properties where continuous perimeter protection is important.
Built-In Surge and Lightning Protection
Electric fence energizers can be exposed to electrical surges and lightning-related risks. The Hammer EZ 640 features built-in lightning and power surge suppression, helping protect the energizer from electrical disturbances.
Proper grounding and professional installation remain essential for achieving reliable and safe operation.
Ideal for Residential and Commercial Security
The Hammer EZ 640 can be used for electric fence installations around homes, apartments, offices, warehouses, factories, schools, farms, institutions, and other secured properties.
It can be integrated with HT wire, W posts, end insulators, line insulators, earth rods, warning signs, gate accessories, sirens, strobes, and other electric fence components to create a complete perimeter security solution.
Whether you are installing a new electric fence or upgrading an existing system, the Hammer Energizer EZ 640 offers powerful energization, fence monitoring, alarm integration, battery backup, and solar compatibility in one dependable unit.

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