ADELAIDE – The South Australian Government has moved to significantly bolster its energy security and accelerate its renewable transition, announcing an AUD$2.2 billion investment to fast-track six new large-scale battery energy storage systems (BESS) across the state. The announcement, made on May 29, 2026, confirms the successful tenders under the state’s Firm Energy Reliability Mechanism (FERM), a strategic initiative designed to ensure long-duration dispatchable capacity for South Australia’s electricity grid.
This substantial investment is projected to more than double South Australia’s current large-scale battery storage capacity, increasing it from 1.1 Gigawatts (GW) to 2.5 GW. The six projects will collectively add over 5.3 Gigawatt-hours (GWh) of storage, capable of powering more than 300,000 average households for up to eight hours.
Energy and Mining Minister Tom Koutsantonis emphasised the critical role these projects will play in the state’s energy future.
“These projects will grow batteries’ contribution to our state’s generation capacity to more than double that of Victoria, New South Wales and Queensland combined, adding capacity to reach almost three-quarters of South Australia’s all-time peak demand, eclipsing all other major Australian grids.”
Projects and Capacity Details
The successful tenderers for the FERM contracts include prominent energy developers Akaysha Energy, ZEBRE, Neoen Australia, AMPYR Australia, and Iberdrola Australia. These companies will collectively deliver the new BESS infrastructure, with specific commercial operation dates targeted for 2028 and 2029.
Key projects include two FERMA contracts awarded to Neoen Australia for its Goyder Battery project in South Australia’s mid-north. Each stage of the Goyder Battery carries a committed power output of 75 MW and a storage capacity of 600 MWh, with a combined nameplate of 400 MW and 1,600 MWh.
| Project/Developer | Power Output (MW) | Storage Capacity (MWh) | Status/Notes |
|---|---|---|---|
| Neoen Goyder Battery Stage 1 | 75 | 600 | FERMA Contract Awarded |
| Neoen Goyder Battery Stage 2 | 75 | 600 | FERMA Contract Awarded |
| Other 4 projects | Varied | Total remaining 4,136 MWh | FERMA Contracts Awarded |
| Total SA FERM | 1,334+ | 5,336+ | By November 2028/2029 |
Bolstering Grid Reliability and Renewable Integration
South Australia has been a leader in renewable energy adoption, with a target of achieving net 100% renewable energy by 2027. The rapid scale-up of battery storage is essential to manage the intermittency of wind and solar generation, ensuring a stable and reliable electricity supply, particularly during peak demand periods or when renewable output is low.
The FERM tender specifically sought long-duration dispatchable capacity, with a requirement for projects to provide eight hours of continuous dispatchable energy. This focus on extended storage duration is a key differentiator, moving beyond shorter-duration batteries to provide more robust grid support. The state’s previous experience, including short-lived but extreme price spikes during hot weather in January due to low generation and limited battery capacity, underscored the need for such firming capacity.
These large-scale batteries will play a crucial role in absorbing excess renewable energy during periods of high generation and discharging it when needed, helping to moderate wholesale electricity prices and reduce reliance on more expensive generation sources like gas. This enhanced flexibility and security benefits not only the grid but also ultimately contributes to more stable and potentially lower electricity bills for consumers. For households looking to manage their energy costs, understanding the broader grid’s stability is vital, and exploring options like Best Electricity Plans in Australia 2026: A Comprehensive Guide for Households to Cut Costs remains a key strategy.
National Context and Economic Impact
The AUD$2.2 billion investment is expected to create significant local jobs and drive economic activity within South Australia’s burgeoning clean energy sector. This move aligns with broader national trends, as highlighted by the Clean Energy Council’s ‘Clean Energy Australia Report 2026’, which declared Australia as the world’s third-largest utility-scale battery energy storage market. The report noted that 4.3 GW of large-scale battery storage systems reached financial close in 2025, demonstrating robust investment in the sector.
While these projects are grid-scale, their success underpins the broader energy transition that benefits all Australians. A more stable grid, supported by large batteries, can create more opportunities for households with rooftop solar to export excess energy and potentially participate in programs such as Unlock $1,000+ Annually: Best Home Battery VPP Programs in Australia 2026 Ranked in the future. The ability of large batteries to manage grid congestion and absorb excess solar generation ultimately creates a more favourable environment for both grid-connected and behind-the-meter energy storage solutions.
The fast-tracking of these six projects underscores South Australia’s commitment to leading Australia’s energy transition, aiming to secure a reliable, affordable, and cleaner energy future for its residents and businesses. With an estimated 375 MW and 3,000 MWh required to be operational by November 2028, and a further 142 MW and 1,136 MWh due by November 2029, the state is rapidly building out the infrastructure needed to support its ambitious renewable energy targets.