en.Wedoany.com Reported - Iberdrola's Australian subsidiary announced that it has submitted an environmental assessment application for a 1GW battery energy storage system under Australia's Environment Protection and Biodiversity Conservation Act (EPBC Act). The project, named the Burrenbring Battery Energy Storage Project, is planned for construction approximately 8 km north of the town of Nebo and about 75 km southwest of Mackay in the Isaac Region of Queensland, with a duration of 2 to 4 hours. It will be directly connected to the Nebo substation operated by Queensland Electricity via an underground 275kV transmission line.
The project will connect to the Australian National Electricity Market (NEM), with a storage capacity ranging from 2GWh to 4GWh. It is proposed to be built on privately owned land within the Widi Aboriginal territory, covering an area of approximately 34 hectares. According to documents submitted under the EPBC Act, the project will be constructed using lithium iron phosphate (LFP) batteries, and will include an on-site substation with up to six transformers and related electrical facilities compliant with Australian standards.
The Nebo substation was built in the late 1970s. In April 2026, Queensland Electricity announced that it would install a synchronous condenser at this substation as part of its power system strength project. This substation is one of four synchronous condensers planned for deployment in central Queensland by 2029 to maintain grid stability.
This application follows the approval process under the EPBC Act for several large-scale battery storage projects. Akaysha Energy received approval for the 400MW/1600MWh Glenrowan Battery Energy Storage Project in Victoria, while BW ESS submitted an application for the 700MW Bannaby Battery Energy Storage System in New South Wales.
Iberdrola's Australian subsidiary is expanding its battery energy storage portfolio, with multiple utility-scale projects either in operation or nearing commissioning. In Queensland, the 360MWh Broadsound Battery Energy Storage System deployed by the company began commissioning earlier this year; the 65MW/130MWh Smithfield Battery Energy Storage System in Western Sydney, New South Wales, was officially commissioned in February 2026.
In October 2025, Iberdrola's Australian subsidiary acquired the 270MW/1080MWh Tungkillo Battery Energy Storage Project in South Australia from RES Australia for €295 million (approximately $344 million). The project has obtained key approvals and grid connection rights and is expected to be operational by 2028, as part of the company's plan to invest AUD 1 billion (approximately $1.14 billion) in battery energy storage system development by 2028.
The Burrenbring Battery Energy Storage Project is independent of the wind farm project developed by the company on the same site, with separate planning approval processes. Construction is planned to commence after the completion of the EPBC Act assessment and state-level development approval in the Isaac Region. The project has a designed operational life of 30 years, after which decommissioning and site ecological restoration will be carried out.
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