Technology group Wärtsilä will deliver a 100 MW / 223 MWh battery energy storage system (BESS) for Australian renewable energy retailer Flow Power. The project, located adjacent to the Morwell Terminal Station in Victoria, represents Wärtsilä's tenth BESS project in Australia and the first collaboration with Flow Power.

The order was booked in Q4 2025, marking a significant milestone for both companies as they work to support Australia's National Electricity Market (NEM) and accelerate the country's transition towards a renewable energy future.

Project Details and Location

Flow Power's Bennetts Creek BESS will provide essential ancillary services, including frequency regulation, to strengthen grid stability. The project will join Flow Power's rapidly expanding portfolio of renewable energy and BESS projects, providing community benefits plus reliable, firmed supply for Australia's grid and its renewable energy retail contracts.

Bennetts Creek will provide frequency regulation, a key ancillary service that offers a steady, valuable income stream complementing energy arbitrage and helping meet key compliance requirements for BESS projects. The system plays a crucial role in keeping the grid stable as traditional generators retire.

Construction of the project will commence in 2026 and is expected to be operational in 2028. The project will be delivered under an engineered equipment delivery (EEQ) contract with Wärtsilä, providing guaranteed asset performance under a separate long-term service agreement.

Technology and Equipment

The project will utilize Wärtsilä's Quantum hardware, described as a fully integrated, modular, and compact energy storage system (ESS) designed to ease deployment and optimize sustainable energy across project locations and market applications.

Wärtsilä's controls and optimization software, GEMS, will serve as the project's intelligent power plant controller, managing the integration of the energy storage system. GEMS conducts intelligent power control and optimized energy management operations for the entire plant to meet grid requirements and response times, charge and discharge the battery appropriately, and maximize project value.

Industry Impact and Market Position

As a Tier 1 integrator in Australia, Wärtsilä will expand its local footprint to more than 6 GWh of capacity with the Bennetts Creek Battery, delivering greater grid stability and supporting the country's net zero by 2045 target.

Suraj Narayan, Managing Director of Wärtsilä Energy Storage Australia, stated that Flow Power shares their commitment to accelerating Australia's clean energy goals. “This project demonstrates how advanced batteries can deliver both reliability and revenue,” Narayan said. “As the National Electricity Market transitions to a lower carbon system with increasing variable renewable energy, systems with strong frequency response capabilities, like Bennetts Creek, will be ideally positioned to tap into these new high-value opportunities.”

Tom Harrison, Flow Power General Manager Energy Projects, described the Bennetts Creek Battery as a significant milestone for Flow Power. “The project will provide firm power and energy storage capacity to support additional renewable energy projects in Victoria and strengthen our growing project portfolio across the National Electricity Market,” Harrison said. “We look forward to collaborating with Wärtsilä to deliver this exciting new project together.”

Company Backgrounds

Wärtsilä Energy Storage operates globally with a footprint across over 130 sites, positioning itself at the forefront of the transition towards a 100% renewable energy future. The company combines proven technologies with deep grid expertise, offering high-performance hardware, intelligent controls and optimization software, and full-service lifecycle support.

Flow Power has operated as an electricity, technology, and engineering company since 2008, reshaping energy in Australia. The company's renewable energy portfolio encompasses wind, solar, and storage, with an innovative approach that uncovers new ways to deliver reliable, renewable energy while reducing costs.

As one of Australia's fastest-growing energy retailers, Flow Power serves organizations including Asahi Beverages, Sydney Opera House, Snack Brands, Westpac, City of Sydney, The University of Melbourne, Newcastle Airport, and Harris Farm Markets. The company recently launched its innovative residential electricity plan, Flow Home, which empowers Australians to make their homes a force for good in the renewable energy transition.

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