State-owned energy company CS Energy announced yesterday (25 July) that its 200MW/400MWh Greenbank battery energy storage system (BESS) has started commercial operations in Queensland, Australia.
The 2-hour duration BESS features 108 Tesla Megapack 2XL units and is located in the rural residential suburb of Greenbank, southeast of Brisbane, the state capital.
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It is connected to the National Electricity Market (NEM), which spans Australia’s southern and eastern coasts as well as Tasmania. It is situated adjacent to Powerlink Queensland’s Greenbank substation, which supplies electricity to Southeast Queensland, particularly the Gold Coast, Logan and South Brisbane areas.
Site work for the Greenbank Battery commenced in late 2023, with a peak construction workforce of 60 people. The project officially began commercial operations in June 2025.
The BESS becomes the second utility-scale battery storage system that CS Energy has brought online after its 100MW/200MWh Chinchilla battery in Queensland’s Western Downs Region last year.
Like the Greenbank Battery, Chinchilla features 80 Tesla Megapack 2XL units. The Megapack is based on Tesla’s integrated solution, which includes lithium-ion (Li-ion) batteries, power conversion system (PCS), thermal management and controls.
Tesla Megapack 2XL units are also being used at Stanwell’s, another state-owned energy company, 300MW/1,200MWh BESS at the Stanwell Power Station in central Queensland. The first of the Megapack units arrived last week, with 324 set to be delivered in total in the coming months.
CS Energy worked with Tesla, Consolidated Power Projects, and Powerlink Queensland to deliver the Greenbank Battery.
CS Energy CEO Brian Gillespie said the Greenbank BESS had gone through a “rigorous” testing and commissioning process, reaffirming beliefs that Australia has some of the toughest grid codes in the world.
“CS Energy also undertook a detailed operational readiness program, which included employee training, critical risk assessments, and safety and design reviews,” Gillespie added.
CS Energy confirmed that the Greenbank BESS required an investment of AU$300 million (US$197 million) to fully develop.
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