World’s largest Battery Energy Storage System (BESS) at Hazelwood, Australia produces 150 MW/150 MWh and delivers further electricity grid stability for Victoria

The state of Victoria in Australia wanted to deliver electricity grid stability for its residents. As an established power generation site with access to 1,600MW of dormant transmission capacity, Hazelwood is uniquely placed to accommodate battery infrastructure.

The ENGIE Solution: A Battery Energy Storage System that produces 150 MW/150 MWh

The Hazelwood Battery Energy Storage System (HBESS) is a utility-scale battery with a capacity of 150MW/150MWh. Positioned to enhance electricity grid stability in Victoria, it can store the energy equivalent to an hour of energy generation from the rooftop solar systems of 30,000 Victorian homes. This system plays a crucial role in augmenting the state’s energy capacity and bolstering grid stability. Leveraging its status as a well-established power generation site with access to 1,600MW of dormant transmission capacity, Hazelwood is ideally situated for integrating battery infrastructure.

Located in the Latrobe Valley at the site of the former Hazelwood Power Station, the Hazelwood Battery is a testament to ENGIE’s dedication to repurposing the area, a project that has been ongoing since 2017. With its innovative design and the site’s distinctive position, the battery offers the agility to rapidly and economically expand storage capacity, meeting both network and market requirements effectively.

Battery storage plays a crucial role in expediting the expansion of solar and wind energy sources. It captures surplus power during periods of abundant renewable generation and releases it during peak demand, diminishing dependence on high-carbon energy sources. The Hazelwood Battery will additionally contribute to frequency control ancillary service markets, providing essential stability to a grid increasingly reliant on intermittent renewable sources. The battery was built using Fluence’s latest-generation Gridstack technology platform – made of 342 modular, standardized factory-built Fluence Cubes – providing industry-leading reliability and safety at all levels of the system. The battery has an expected lifespan of 20 years, but key components of the battery can be augmented over time, or can potentially change storage technologies at the same point of grid connection further in the future to extend the life of the asset.

The project was funded by ENGIE and Eku Energy, and was built, operated, and maintained over a 20-year period by Fluence, a global market leader in energy storage products and services and digital applications for renewables and storage.

150/150 MW/MWh

Battery Capacity

1,600 MW

Dormant Transmission Capacity

20 Year


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