Stanwell’s first dispatchable energy storage project, the Tarong Battery, has commenced commercial operations, marking a major milestone in the development of the State’s future energy portfolio.

The $514 million project, based at the Tarong power stations near Nanango, has been in construction since 2023 and is now supplying electricity to the National Electricity Market (NEM).

The battery comprises 164 lithium-ion Tesla Megapacks and will boost Tarong power stations’ overall capacity to 2.1 GW, enhancing its position as the single largest generating site in Queensland. It will be operated utilising Tarong power stations’ management and operating systems.

Stanwell CEO, Michael O’Rourke said Stanwell is playing a key role in establishing Queensland’s future energy portfolio, while continuing to invest in and maintain our existing assets.

“This is a significant milestone for Stanwell, our first wholly owned battery project, delivered end-to-end by our team from concept through to construction, operations and maintenance.” Mr O’Rourke said.

“The 300MW battery will store energy during periods of high generation and then release it into the grid during periods of high demand, responding within fractions of a second to provide essential firming capacity and reliability.

“Stanwell’s deep experience operating and maintaining reliable coal-fired power stations is powering a broader vision, to build a more flexible and reliable energy portfolio to meet Queensland’s growing energy needs.

“This means we can continue to deliver affordable, reliable and sustainable energy for Queensland, our customers and the NEM.

“This exciting new chapter reflects the tireless dedication of everyone who has contributed to the project over the past two and a half years.”

Since construction began, the project has created 80 full-time jobs and delivered numerous contract opportunities for local suppliers, supporting small businesses across the South Burnett.

The Tarong Battery forms part of Stanwell’s wider 2.8GWh battery firming portfolio, along with the Stanwell Battery near Rockhampton and a capacity purchase agreement for 100% of the stored energy from Quinbrook’s Supernode Stage 3 BESS at Brendale.