Giant Tomago Battery and VPP Win New Firming Tender to Fill Gaps in Supply

Why It Matters

The win bolsters grid reliability during peak demand while accelerating the transition to a renewables‑led system, showcasing how storage and flexible demand can replace retiring coal generation.

Key Takeaways

• Tomago battery (500 MW, 2,000 MWh) secures first major contract.
• Enel X VPP adds 32 MW flexible demand from Sydney and Newcastle businesses.
• Projects must deliver capacity during LOR 2 and 3 events to prevent shortages.
• Tender total capacity exceeds 1.5 GW, with competitively low pricing.
• Commissioning deadline set for November 2025 for both projects.

Pulse Analysis

New South Wales is confronting a looming supply gap as its legacy coal‑fired stations near retirement, prompting the state’s Australian Energy Market Operator (AEMO) to issue firming tenders that prioritize fast‑acting resources. By targeting Lack of Reserve (LOR) events—periods when generation falls short of demand—the market aims to secure dispatchable capacity without over‑building new peaking plants. This strategic shift aligns with broader Australian energy policy that emphasizes renewable integration, grid resilience, and cost‑effective solutions.

The Tomago battery, a 500 MW/2,000 MWh lithium‑ion installation built by AGL near the eponymous aluminium smelter, clinched its first major contract under the latest tender. Paired with Enel X’s 32 MW virtual power plant, which aggregates flexible demand from commercial customers in Sydney and Newcastle, the duo will be obligated to deliver power during LOR 2 and 3 events. Their combined capacity, alongside other awarded projects, pushes the total firming supply above 1.5 GW, while the tender’s pricing was reported as markedly lower than previous rounds, reflecting the rapid cost decline of battery storage and the economic appeal of demand‑response services.

The implications extend beyond New South Wales. Successful bids demonstrate that large‑scale batteries and business‑driven VPPs can meet reliability standards traditionally reserved for conventional generators. As AEMO prepares additional tenders—including a 2.5 GW generation round and a 12.5 GWh long‑duration storage program—the market is likely to see heightened participation from both utilities and corporate energy users. This evolution not only supports Australia’s renewable targets but also creates new revenue streams for firms that can modulate consumption, positioning demand flexibility as a cornerstone of the nation’s future energy mix.