Chief Minister Andrew Barr will announce funding for the start of the Big Canberra Battery project in next week's ACT budget.

The project will be delivered in three parts. The first part will deliver 250 megawatts of grid connected battery storage that will support the electricity network.

There will be batteries installed at 14 government-owned sites across the city as part of the second part. Batteries are planned for sites in Fyshwick, Gungahlin, Belconnen, Chifley, Greenway, Kambah and Stromlo.

MORE A.C.T. BUDGET 2022-23

The third part will include the delivery of medium-sized neighbourhood batteries.

The battery system could potentially power more than one-third of the ACT.

In the 2020-21 territory budget there was $100 million allocated over a five-year period to deliver the big battery project.

Expressions of interest for the development of large-scale batteries closed in February 2022. Procurement is currently underway on this with the batteries to be built from 2023.

The ACT government is expected to open the tender process for the first and second part of the project next month.

The battery was a commitment from Labor in the 2020 ACT election.

The ACT budget will be handed down on August 2.

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