With decades of experience, our technicians are qualified to install a wide range of electrical services and apparatus.
Hennessy specialises in delivering high-quality electrical installations across the greater Waikato region and beyond. From custom-built switchboards and motor control centres to general lighting, security systems, and emergency and exit lighting, we cover it all. Our expertise extends to advanced motor control solutions—including motor starters, variable speed drives, and soft starters—as well as heavy-duty switchboards, transformers, and complete power distribution systems for both high- and low-voltage commercial and industrial sites. We also provide reliable generator and standby power solutions, uninterruptible power supplies (UPS), and lightning surge protection—making Hennessy a trusted name in the industry



From high-stakes greenfield electrical project work to EVC installations, our clients count on us for our technical know-how, project experience, and reliable, expert support to help keep their project running smoothly.

Hennessy offers a comprehensive range of electrical services, from appliance testing and thermal imaging surveys to ongoing maintenance and prompt breakdown support.

With decades of experience in electrical engineering, our expert electricians can assist with a variety of electrical needs, from commercial general lighting right through to switchgear and transformers for heavy industry.

Hennessy offer fully qualified instrument Technicians who carry out Instrumentation Calibration, commissioning, and installation services for clients across the Waikato region.

We offer bespoke design, planning and installation of production factory and warehouse automation systems for supply chain manufacturing, food and beverage production, robotics, retail and agricultural industries.