NHOA Energy has broken ground on the Hallett Battery Energy Storage System (BESS) project. This major milestone is intended to support the reliability of South Australia’s electricity transmission network as a whole. With a total capacity of 245 megawatt-hours (MWh), the new system is the largest and most advanced of its kind. It will be built in Hallett, South Australia and is expected to start commissioning in January 2027. As the consortium partners, NHOA Energy, EnergyAustralia and Enerven are collaborating to provide an integrated, high-performance solution. Together, they are making an exciting move to forge a more robust clean energy future.
The Hallett BESS will provide significant value to the region’s energy resources. It will offer critical services including frequency response, voltage support, and energy arbitrage. The project’s strategic alignment with Australia’s NEM objectives is its platform to increase regional grid stability while fostering and sustaining community-based employment in both construction and maintenance phases.
In addition to its Hallett BESS, NHOA Energy runs the Blyth Battery. Such a facility would be unprecedented at an impressive capacity of 238.5MW/477MWh. Blyth Battery, in South Australia, was commissioned in April 2025. It is designed to improve the overall stability of the National Electricity Market through delivery of reliable grid support services.
The Hallett BESS commissioning ceremony took place at the Hallett Power Station. This deeply resonated with the community as it illustrated the project’s vision and transformative potential to build a new local economy and clean energy future. We’re proud to support this innovative project,” stated Adrian Marziano, NHOA Energy Australia & Pacific Vice President.
“We are proud to support EnergyAustralia in a project that combines advanced grid-forming technology with a strong institutional framework such as the Capacity Investment Scheme, while making smart use of existing infrastructure.” – Adrian Marziano, NHOA Energy Australia and Pacific VP
Daniel Nugent, EnergyAustralia’s trading and transition executive, emphasized the need to leverage as much existing infrastructure as possible for the project’s success.
“By building the battery at Hallett, we are making use of infrastructure that is already there, supporting local jobs and strengthening South Australia’s power system at the same time. Financial close means this project is real, funded and now being built, and our focus now shifts squarely to disciplined execution and delivery.” – Daniel Nugent, EnergyAustralia trading and transition executive
With the Hallett BESS project, we see a bigger leap towards energy storage solutions powered by renewables. Lastly, it depicts a thoughtful and determined effort to enhance grid reliability, while increasing economic opportunities across the region.