The Ruakākā BESS delivers 100 MW of power output with 200 MWh of energy storage capacity, providing grid-scale support to the national electricity network and the ability to supply the energy needs of tens of thousands of homes during periods of peak demand. Construction began in early 2023 and was completed in 2025 within the original project budget, with the facility officially opened in May 2025.
McKay’s involvement in the project spanned core construction and implementation activities, working alongside battery technology partner Saft and Meridian Energy to realise the technical, logistical, and quality requirements of the build. McKay provided specialist pre-commissioning and commissioning support, ensuring the system was delivered to exacting standards and contributing to its readiness for operation.
The BESS plays a crucial role in enhancing grid stability and resilience by storing excess electricity, including renewable generation, and discharging it when demand peaks or supply fluctuates. This functionality helps smooth out variability in the electricity system and supports greater integration of renewable energy sources, reinforcing New Zealand’s decarbonisation goals.
The Ruakākā BESS project underscores McKay’s expertise in complex energy infrastructure delivery, demonstrating the company’s capability to support large-scale renewable energy and grid resilience initiatives. The success of this project reflects McKay’s long-standing commitment to innovation, quality delivery, and sustainable outcomes for communities across Aotearoa.
