# Allens Advises Engie Australia on Second Stage of Hazelwood Battery Storage Expansion

> Allens advised Engie Australia on the second stage of the Hazelwood battery, adding 150MW/300MWh and lifting site capacity to 300MW/450MWh in Victoria.

- Published: 2026-10-21T00:13:53+00:00
- Section: Expansion
- Author: News Desk
- URL: https://newsforagent.com/news/2026-10-21/allens-engie-hazelwood-battery-expansion
- Source: [Mirage News](https://www.miragenews.com/allens-advises-engie-on-hazelwood-battery-1763838/)

## Key takeaways

- Allens advised Engie Australia on the second stage of the Hazelwood Battery Energy Storage System, adding 150MW/300MWh.
- The expansion lifts total installed capacity at the former Hazelwood Power Station site to 300MW/450MWh.
- Energy-Storage.News said the expansion would create up to 370 jobs and complete by 2028, with no cost disclosed.

[Allens](https://akta.pro/company-profiles/00072pn/allens) advised [Engie](https://akta.pro/company-profiles/0000785/engie) Australia on the second stage of the Hazelwood Battery Energy Storage System, adding 150MW/300MWh of battery storage at the former Hazelwood Power Station site in Victoria. [Mirage News](https://www.miragenews.com/allens-advises-engie-on-hazelwood-battery-1763838/) reported the advisory role. The expansion lifts the site's total installed battery storage capacity to 300MW/450MWh.

## Allens' Role in the Hazelwood Battery Expansion

Allens advised on construction, operations, grid connection, offtake arrangements and tenure for the second stage, which builds on the existing 150MW/150MWh Hazelwood BESS that the firm also advised on. Joint lead partner Kate Axup said: "The expansion of the Hazelwood BESS demonstrates the important role large-scale battery storage can play in repurposing former thermal generation sites." Joint lead partner David Donnelly said the firm continues to see significant investment in large-scale battery storage as Australia's electricity system requires greater capacity and flexibility.

[Energy-Storage.News](https://www.energy-storage.news/hazelwood-bess-expansion-in-australia-set-to-double-storage-capacity-at-former-coal-site/) reported that a Victorian government declaration enabled the expansion, which would create up to 370 jobs and complete by 2028, with no cost disclosed. Engie, the French utility behind the project, said on October 20 that higher-than-average temperatures in 2026 will reduce its French volumes, according to MarketScreener, with negative effects of 6.5 TWh in Infrastructure, 1.8 TWh in B2C and 0.8 TWh in B2B.

## Allens' Scale Behind the Engie Mandate

According to akta.pro [company records](https://akta.pro/company-data), Allens announced 95 senior promotions across legal, Corporate Services and Integrated Legal Solutions teams, effective 1 July, following an earlier announcement of 16 new partners. The firm operates in an integrated alliance with Linklaters LLP, giving its clients access to 40 international offices across 25 countries. Allens was founded in 1820 and is headquartered in Sydney.

## Allens' Recent Energy and Infrastructure Work

On October 20, Mirage News reported that Allens advised a syndicate of lenders on three financings for Atmos Renewables' expansion in Western Australia, Queensland and Victoria, covering the Parron Maam Marang wind farm, the Teebar battery storage system, and acquisitions of Hughenden and Yatpool solar farms. On September 15, the firm advised St Barbara on the A$453 million sale of its remaining interest in the New Simberi Gold Project in Papua New Guinea to Lingbao Gold Group. On September 14, it advised The Living Company on the over station development above the main entrance to the new State Library Station in Melbourne.

## What Comes Next for Hazelwood

Energy-Storage.News reported the expansion would complete by 2028. The Victorian government declaration enabled the project, and no cost was disclosed.

## Companies in this story

- [Allens company profile](https://akta.pro/company-profiles/00072pn/allens) · website: https://www.allens.com.au
- [Engie company profile](https://akta.pro/company-profiles/0000785/engie) · website: http://www.engie.com

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