Queensland's Supernode BESS Now Australia's Largest at 800 MWh, Boosting Grid Stability

Queensland has officially taken the lead in Australia’s utility-scale battery storage landscape, with Quinbrook Infrastructure Partners’ Supernode Battery Energy Storage System (BESS) at Greenbank, south-west of Brisbane, achieving full operational status as the nation’s largest. As of July 29, 2026, the Supernode BESS boasts a substantial capacity of 400 MW / 800 MWh, solidifying Queensland’s position in the transition to a renewable energy future.

This significant milestone sees the Supernode BESS surpass Neoen’s 300 MW / 450 MWh Victorian Big Battery near Geelong, which previously held the title. The commissioning of such a large-scale asset is critical for enhancing grid stability, integrating a greater share of renewable energy, and providing essential firming capacity to the National Electricity Market (NEM) during peak demand periods. The project represents an investment of approximately AUD $600 million by Quinbrook.

Queensland’s Strategic Energy Shift Gains Momentum

The activation of the Supernode BESS underscores Queensland’s commitment to its ambitious renewable energy targets, aiming for 70% renewable energy by 2032 and 80% by 2035. Batteries like Supernode are vital for managing the intermittency of solar and wind power, ensuring a reliable and continuous supply of electricity to homes and businesses across the state. The Greenbank location is strategically important, situated within a high-growth region and connected to Powerlink’s transmission network, allowing it to efficiently dispatch stored energy where and when it is needed most.

“The commissioning of Supernode as the NEM’s largest operational battery is a testament to Queensland’s forward-thinking energy policy and private sector investment,” stated a spokesperson for Quinbrook Infrastructure Partners. “This 800 MWh asset will play a pivotal role in stabilising the grid, preventing blackouts, and ensuring that Queenslanders benefit from cheaper, cleaner energy for decades to come.”

“The NEM’s grid-scale BESS fleet has now passed 9,000 MW, with battery price spreads falling 85% in a year, demonstrating the increasing impact of these assets.”

Technical Specifications and Market Impact

The 400 MW / 800 MWh configuration of the Supernode BESS provides a two-hour duration of full power discharge, a crucial capability for managing evening peaks when solar generation declines. This capacity allows the battery to respond rapidly to fluctuations in supply and demand, providing Frequency Control Ancillary Services (FCAS) that are essential for grid stability. The project integrates advanced lithium-ion battery technology, designed for high performance and longevity in Australian conditions.

The increasing deployment of large batteries across the NEM is having a tangible impact on wholesale electricity prices. Recent data indicates that battery price spreads have fallen by 85% over the last year, suggesting that these storage solutions are effectively moderating peak pricing and reducing market volatility.

The Growing Role of Grid-Scale Storage

Grid-scale batteries are increasingly recognised as indispensable infrastructure for modern energy systems. Unlike traditional fossil fuel generators that can take hours to ramp up, BESS facilities can inject or absorb power within milliseconds, providing a dynamic response to grid events. This responsiveness is critical for maintaining system security as more variable renewable energy sources come online.

Queensland has several other significant battery projects either planned or under construction, including CleanCo’s 250 MW / 500 MWh Swanbank Battery. These developments collectively contribute to the state’s goal of establishing a robust and resilient energy network capable of handling extreme weather events and supporting industrial growth with clean power.

For homeowners considering their own energy storage solutions, the proliferation of grid-scale batteries indirectly supports the broader energy transition, making the grid more stable for everyone. While the federal Cheaper Home Batteries Program offers discounts for residential installations, the large-scale projects like Supernode address systemic grid challenges. Homeowners can explore options for Best Home Batteries in Australia 2026: Models, Costs & Up To $7,500 Rebates to understand how they can contribute to energy independence and potentially participate in virtual power plants (VPPs) that aggregate residential battery capacity.

The future of Australia’s energy market will continue to be shaped by these monumental battery projects, providing a backbone for the nation’s renewable energy ambitions and offering greater energy security for all Australians. As more large-scale batteries come online, the lessons learned from their operation will inform future developments and policy decisions, driving further innovation in energy storage. For those looking to understand broader energy support, a guide to Australian Energy Bill Relief & Utility Concessions 2026: Your Comprehensive Guide is available.

Other Recent Battery Milestones

Beyond Supernode, Australia’s battery sector saw other significant developments this week:

• Neoen Australia commenced construction on a 907 MWh grid-forming BESS in South Australia on July 29, 2026, further expanding its substantial battery portfolio.
• Ark Energy secured AUD $1.3 billion in funding for a 2.2 GWh solar-plus-storage site in New South Wales on July 27, 2026, highlighting massive investment in hybrid renewable projects.

These concurrent announcements underscore the rapid pace of battery deployment and investment across the country, transforming Australia’s energy landscape.