The New South Wales government has today announced a significant AUD 100 million investment through its Energy Security Corporation (ESC) to fast-track the development of 650 megawatts (MW) of new large-scale battery storage across the state. This critical funding aims to bolster grid reliability and ensure a stable energy supply as the state’s ageing coal-fired power stations progressively retire, with 500MW of this new capacity expected online by early 2029.
The investment, announced on June 16, 2026, marks the ESC’s inaugural commitment since its establishment last year. It will support the construction of four new lithium-ion Battery Energy Storage System (BESS) projects, developed by PLUS Grid Storage, a commercial entity operating independently within the Ausgrid network. These projects are strategically located in high-demand areas: Sydney, Newcastle, and the Hunter Central Coast.
“Large-scale batteries are revolutionising NSW’s energy grid, delivering greater energy security and helping to drive down prices,” stated NSW Energy Minister Penny Sharpe. “With this first investment, the Minns Labor Government’s Energy Security Corporation is helping to accelerate more of these critical projects – helping keep power reliable and affordable for everyone across the state.”
Bolstering the Grid Ahead of Coal Retirements
This investment is timed to coincide with the anticipated retirement of NSW’s coal-fired generators, beginning with Origin Energy’s 2,880MW Eraring power station in April 2029. The Australian Energy Market Operator (AEMO) had previously identified insufficient replacement capacity, prompting an extension for Eraring’s operation. The ESC’s strategic intervention aims to close this looming supply gap.
Paul Peters, CEO of the Energy Security Corporation, highlighted the urgency: “This is a platform investment in one of the state’s most critical load centres, where demand is highest, land is constrained and the need for storage is most immediate.” He added that PLUS Grid Storage’s ability to deliver these projects by 2029 and make better use of existing infrastructure were key factors in the investment decision.
“During the first three months of this of this year, grid-scale batteries in the NEM more than tripled the amount of energy they shifted from daytime to the evening.” – Daniel Westerman, AEMO Chief Executive
Project Breakdown and Timeline
The initial phase of the rollout includes two 200MW/400MWh battery systems. One will be constructed at the Steel River Industrial Estate in Newcastle, with construction expected to commence in July 2026. The second 200MW system will be located at Homebush in western Sydney. These two projects alone will contribute 400MW of the 500MW target for early 2029.
Two additional batteries, approximately 100MW and 150MW respectively, are in earlier stages of development and will contribute to the total 650MW capacity, with the full 650MW expected to be operational by late 2029. The combined 650MW capacity could ultimately expand to 1GW by 2031.
| Project Location | Initial Capacity (MW) | Expected Operation Date |
|---|---|---|
| Steel River, Newcastle | 200 | Early 2029 |
| Homebush, Western Sydney | 200 | Early 2029 |
| Unspecified NSW (2 projects) | 100 & 150 | Early to Late 2029 |
| Total Initial Commitment | 650 | By Late 2029 |
These large-scale batteries are pivotal in shifting cheap renewable energy generated during the day to meet evening peak demand, thereby reducing reliance on more expensive gas-fired generation and contributing to lower wholesale electricity prices. AEMO’s latest data from Q1 2026 shows that grid-scale batteries in the National Electricity Market (NEM) more than tripled the energy they shifted from daytime to evening peaks compared to the previous year, frequently setting market prices in approximately 32% of trading intervals.
Broader Impact on Energy Transition and Bills
The ESC’s investment aligns with NSW’s broader Electricity Infrastructure Roadmap, which recently launched Tender 8 for 2.5GW of generation projects and Tender 9 for up to 12GWh of long-duration energy storage, with results anticipated in late 2026. These coordinated efforts underscore a comprehensive strategy to transition NSW to a renewables-dominated grid, ensuring energy security and affordability.
For households, a more stable and cost-effective grid translates directly into potential savings on electricity bills. As large-scale storage reduces peak demand and price volatility, the benefits ripple down to consumers. Australians considering how to further reduce their energy costs might also explore options such as Is a Gas to Electric Home Conversion Worth It in Australia 2026? Unlock $1,000s in Savings & Rebates to complement the evolving grid. Furthermore, understanding general support mechanisms can provide additional relief; for more information, refer to Navigating Australia’s Energy Bill Relief and Support in 2026: A Comprehensive Guide.
The rapid expansion of battery storage, both at grid-scale and residential levels, is fundamentally reshaping Australia’s energy landscape. By investing in strategic projects like these, the NSW government is not only securing its energy future but also contributing to a more resilient and affordable electricity system for all residents. This shift towards firmed renewable energy is identified by AEMO as the least-cost pathway for Australia’s energy future.