Technology group Wärtsilä announces that the 150-megawatt (MW) / 300-megawatt-hour (MWh) battery energy storage system provided to owner and operator Revera Energy (Revera) in Bungama, South Australia, has now begun commercial operations. It is Wärtsilä’s fourth energy storage project in Australia to become operational.
The Bungama project strengthens South Australia’s ability to manage record levels of renewable energy while supporting grid reliability across the National Electricity Market (NEM). It also marks a significant step in a multi-stage development programme and is built to respond to fast changes in grid variability, including solar and wind output, with precision. South Australia regularly operates with some of the world’s highest levels of variable renewable generation, making advanced storage infrastructure essential to maintaining energy stability and reliability.
The first stage of the Bungama energy storage system processed through the commissioning testing phase ahead of schedule, completing each of the three Hold Point Tests in quick succession. This enabled the project to progress smoothly from commissioning to full commercial operation under Australian Energy Market Operator (AEMO) requirements. Hold Point Tests are AEMO mandated commissioning approvals that allow new energy assets to move in stages from limited operation to full commercial output, confirming safe and reliable performance at each step.
"Bungama BESS is a cornerstone asset in Revera’s strategy to build the flexible infrastructure Australia needs for its clean energy future," says Daniel Kim, Chief Executive Officer at Revera. "Working alongside Wärtsilä and our project partners, this project demonstrates what effective collaboration can deliver, while meeting the high technical and safety standards required for the grid."
"Delivering the first stage of the Bungama energy storage system in one of the world’s most dynamic renewable markets demonstrates what advanced technology and deep system collaboration can achieve," says Don Lee, Vice President, Global Operations at Wärtsilä Energy Storage. "This project shows how storage can be deployed at pace to support regions operating at the frontier of the energy transition, helping to stabilise the grid and ensure more secure, reliable energy for local communities."
At the core of the project is Wärtsilä Energy Storage’s GridSolve™ Quantum High Energy (HE) technology, which features advanced safety architecture and a high energy-density design. The grid-connected site is orchestrated by Wärtsilä's GEMS platform, which fine-tunes operations in real time and provides rapid frequency response with millisecond-level accuracy. This combination of Wärtsilä's advanced hardware and software technology enables the facility to capture excess renewable energy and enhance grid flexibility and stability by supporting essential grid services, including frequency control ancillary services, fast frequency response, and energy arbitrage. The project will be supported by a long-term service agreement from Wärtsilä to ensure performance throughout the lifecycle of the installation.
Wärtsilä worked closely with AEMO, transmission network service provider ElectraNet, and Balance of Plant (BOP) contractor Enerven to ensure safe transport, high-quality engineering, and a streamlined commissioning process within one of the world’s most demanding grid environments. Wärtsilä’s energy storage portfolio now exceeds 6 GWh in Australia.
Media contact for more information on this release:
Amanda Young
Director, Marketing & Communications
Wärtsilä Energy Storage
[email protected]
Image caption: Wärtsilä delivers 150 MW / 300 MWh Bungama energy storage system for Revera Energy in South Australia, supporting energy stability and reliability. © Wärtsilä
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Wärtsilä Energy Storage in brief
Wärtsilä Energy Storage is at the forefront of the transition towards a 100% renewable energy future. We help customers accelerate global decarbonisation efforts by combining proven technologies with deep grid expertise. Our portfolio includes high-performance hardware, intelligent controls and optimisation software, and full-service lifecycle support to deliver lasting value across the project lifespan. From enhancing grid stability to unlocking flexibility and operational efficiency, our utility-scale battery energy storage solutions are built for real-world performance. Trusted by top-tier utilities, developers, and system operators, Wärtsilä Energy Storage has a global footprint across 130+ sites—delivering the scale, safety, and reliability needed to power the energy transition.
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Wärtsilä in brief
Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy industries. We emphasise innovation in sustainable technology and services to help our customers continuously improve environmental and economic performance. Our dedicated and passionate team of 17,900 professionals in 199 locations in 78 countries shape the decarbonisation transformation of our industries across the globe. In 2025, Wärtsilä’s net sales totalled EUR 6.9 billion. Wärtsilä is listed on Nasdaq Helsinki.
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