GreenPoint approves South Australia battery, signs AI data center offtake deal
Clean energy developer GreenPoint Energy, formerly Equis, has reached financial close on its Koolunga grid-forming battery energy storage project in South Australia, and struck a long-term offtake agreement with global energy trading company Gunvor Group.
GreenPoint said the “bespoke” offtake agreement provides long-term revenue certainty for the Koolunga battery while enabling the delivery of firm renewable power product via Gunvor to Australia-founded data center infrastructure company Firmus Technologies’ planned large-scale AI factories in South Australia.
“The Koolunga BESS reflects GreenPoint Energy’s ability to design and deliver bankable offtake arrangements that support project delivery and customer demand,” GreenPoint co-Chief Executive Officer Roby Camagong said, adding that the agreement is intended to provide a scalable model for future data center customers as demand grows for reliable, firmed renewable power solutions.
“We designed this structure for customers with firm load requirements, specifically data centers,” he said. “As demand for reliable power continues to accelerate, particularly from AI and digital infrastructure, we believe this model provides a scalable framework.”
The Koolunga battery will be built near Brinkworth in South Australia’s Mid North. Construction of the energy storage system is expected to start soon and take up to 18 months, with operations anticipated to commence in early 2028.
Once operational, the battery will deliver 200 MW storage capacity and discharge capacity up to 800 MWh. The facility will connect to South Australia’s electricity grid via a transmission line that links to the nearby 275 kV Brinkworth Substation.
In addition to the offtake agreement, the project has been awarded a Capacity Investment Scheme (CIS) contract by the Australian government.
The Koolunga battery adds to GreenPoint’s growing renewables portfolio. The company has a 2.5 GW portfolio of 12 battery energy storage and wind assets that span every National Energy Market-connected state, including the 600 MW/1,600 MWh Melbourne Renewable Energy Hub (MREH) in Victoria. Greenpoint is also building the 250 MW/500 MWh Calala BESS in New South Wales and the 200 MW / 800 MWh Lower Wonga battery in Queensland.
For Guvnor, the Koolunga battery forms the foundation of its 12-year wholesale energy supply agreement with Firmus. The deal is to deliver 600 MW of firm electricity to support the first phase of Firmus’ plans to build data center infrastructure at Tailem Bend and Stirling North in South Australia, representing 2.7 GW of planned capacity.
Under the agreement, Gunvor will support the development of 1.2 GW of new renewable generation and 1.5 GWh of new battery storage by 2032. The agreement also includes a demand response commitment under which Firmus will reduce its electricity consumption for up to 220 hours each year when wholesale electricity prices exceed agreed thresholds.
David Maher, Guvnor’s head of power trading and origination in the Asia Pacific region, said the agreement demonstrates how long-term customer demand can help unlock renewable supply, firming and risk management through a single commercial solution.
“As AI and digital infrastructure continue to develop in Australia, we believe models like this can support investment in new generation and storage while delivering reliable and flexible supply outcomes,” he said.
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