Eraring Big Battery

Eraring Big Battery battery storage overview.

The operating Eraring Big Battery is the initial 460 MW battery at Origin’s Eraring energy site in New South Wales. The first battery and its energy-storage extension entered commercial operation in late 2025. It stores electricity from the grid and discharges during periods of demand, while a separate 240 MW battery remains under construction.In OperationAustralia

At a Glance

Capacity

460 MW

Energy storage

1,770 MWh

Storage duration

3.9 hours

Storage type

Unknown

Owners

Origin Energy +1 more

Operator

Data coming soon

Country

Australia

Location

-33.067°, 151.514°

Website

Official project page

Ownership

2 records

Share	Organisation	Role	Details	Period
Unknown		Indirect Parent	Origin Energy’s owned-storage portfolio includes the operating initial Eraring battery and its energy-storage extension.	Current / not dated
Unknown		Developer	Origin Energy Eraring Pty Limited is the project proponent responsible for delivering the Eraring BESS development.	Current / not dated

Organisations

7 records

Organisations recorded as working on this asset or its project, and their role.

Organisation	Role	Details
	Battery design and construction contractorEpc Balance Of Plant	Enerven was appointed to construct the original 460 MW Eraring battery, working alongside Origin and Wärtsilä.
	Accredited and principal certifierCertification And Technical Assurance	Provided building and structural compliance certification for the initial Eraring battery. Its project reference distinguishes operational testing from later commercial operation.
	Battery development and investment groupDevelopment And Finance	Developed and invested in the initial Eraring battery and its energy-storage extension, which entered commercial operation in late 2025.
	Eraring BESS proponentProject Company And Development	The independent environmental audit identifies Origin Energy Eraring Pty Limited as the applicant responsible for delivery of the Eraring BESS project.
	Civil-works contractorEpc Balance Of Plant	Engaged by Enerven for bulk earthworks, stormwater and drainage, pavement and kerbing works, with its scope expanded to include substation foundation works.
	Transmission connection infrastructure operatorGrid Connection	The Eraring BESS connects through the existing Transgrid switchyard at Eraring via new high-voltage connection infrastructure.
	Battery energy-storage system supplierEquipment Supply	Origin selected Wärtsilä for the initial battery in 2023 and its subsequent storage extension in 2024. Later Eraring stages have their own delivery scope and schedules.

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