Hazelwood Battery



The Hazelwood Battery Energy Storage System (HBESS) is a 150MW/150MWh utility-scale battery that will deliver further electricity grid stability for Victoria. It has the capacity to store the energy equivalent of an hour of energy generation from the rooftop solar systems of 30,000 Victorian homes, playing a critical role in increasing the state’s energy capacity and delivering further grid stability. As an established power generation site with access to 1,600MW of dormant transmission capacity, Hazelwood is uniquely placed to accommodate battery infrastructure.

Situated at the former Hazelwood Power Station in the Latrobe Valley, the Hazelwood Battery forms part of ENGIE’s commitment to repurposing the site, which ENGIE has been rehabilitating since 2017. The battery’s innovative design and the site’s unique location provides the flexibility to scale up storage capacity quickly and cost-effectively in order to respond to network and market demand. 
Battery storage serves a key role in accelerating the build-out of solar and wind resources, capturing excess power during periods of high renewable generation while discharging to meet peak demand and reduce reliance on high-carbon energy. The Hazelwood Battery will also participate in frequency control ancillary service markets, delivering critical stability to a grid increasingly comprised of intermittent renewable sources.

Key Figures

The Battery: 

  • 150 MW/150 MWh utility-scale battery-based energy storage system - intended as a grid stability and peak power asset. This means the battery will be able to send extra electricity into the grid in times of peak demand, or store electricity that is not being used in times of low demand. 
  • The project is funded by ENGIE and Macquarie’s Green Investment Group (GIG), and will be 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.
  • The battery will be built using Fluence’s latest-generation Gridstack technology platform - made of 342 modular, standardised factory-built Fluence Cubes - providing industry-leading reliability and safety at all levels of the system 
  • It will take about a year to build and should be operational by November 2022, ahead of increased electricity demand over the summer months. 
  • 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. 

Project Partners

The Hazelwood Battery is being delivered by ENGIE, Macquarie’s Green Investment Group and Fluence.



ENGIE is a global player in low-carbon energy solutions, focusing on renewables and the infrastructure and services that support its customers’ decarbonisation. In Australia, ENGIE’s portfolio includes 1.1 GW of operating gas-fired power plants, 165 MW of operating wind farms and a 2 GW pipeline of solar, wind and large-scale batteries under development. ENGIE’s Australian business includes energy retailer Simply Energy with 745,000 electricity and gas customer accounts and a successful Virtual Power Plant project, and a client solutions business focused on Net Zero outcomes for universities, cities and large companies and the development of electric vehicle charging infrastructure. ENGIE, along with partners, is also delivering two large-scale hydrogen projects in Victoria and Western Australia. 

  • 1.1 GW of operating gas-fired power plants
  • 165 MW of operating wind farms 
  • 2 GW pipeline of solar generation 
  • Wind and large-scale battery projects under development
  • Energy retailer Simply Energy with 750,000 electricity and gas customers and a successful Virtual Power Plant project
  • A client solutions business focused on Net Zero outcomes for universities, cities and large companies and the development of electric vehicle charging infrastructure
  • Along with its key partners, ENGIE is delivering two large-scale hydrogen projects


About Macquarie’s Green Investment Group 

Macquarie’s Green Investment Group (GIG) is a specialist in green infrastructure principal investment, project development and delivery, green impact advisory and the management of portfolio assets. Its track record, expertise and capability make it a global leader in green investment and development, dedicated to accelerating the green transition.    
Initially launched by the UK Government in 2012 as the Green Investment Bank, it was the first institution of its type in the world. It was purchased by Macquarie in 2017 to create one of the world’s largest teams of specialist green infrastructure developers and investors. Now operating as the Green Investment Group, the business and its operating platforms have investments or operations in over 25 markets, more than 450 staff and a global development pipeline of more than 35 GW.   
Macquarie Group Limited (Macquarie) is a diversified financial group providing clients with asset management and finance, banking, advisory and risk and capital solutions across debt, equity and commodities.  Founded in 1969, Macquarie employs 17,209 people in 33 markets. At 30 September 2021, Macquarie had assets under management of $A737.0 billion.  
For more information, visit greeninvestmentgroup.com and macquarie.com


About Fluence

Fluence, a Siemens and AES company, is a global market leader in energy storage products and services and digital applications for renewables and storage. We have more than 3.4 GW of energy storage deployed or contracted in 29 markets globally, and more than 4.5 GW of wind, solar and storage assets optimised or contracted in Australia and California. Through our products, services and AI-enabled Fluence IQ platform, we are helping customers around the world drive more resilient electric grids and a more sustainable future.

For more information, visit https://fluenceenergy.com/


Media Release

Contact Us

Get in touch with us to see how we can help find the right solution for you.
Your details
You agree we may collect, maintain, use and disclose your personal information in accordance with our Privacy Policy