AGL Energy – Liddell Large Scale Battery with advanced inverters; Deployment Project
Australia · Energy
In-depth researchRelease 1
Project scope
Planned construction and operation of a 500 MW / 1,000 MWh grid-forming battery with advanced inverters, connecting directly to TransGrid’s existing 330 kV switchyard at Liddell.
Reported status and procurement
Reported development
Not established
Procurement availability
Unknown / not established
Reported regulatory context
NSW planning approval has been received for a battery energy storage system of up to 500 MW / 2,000 MWh at the proposed location; this approval capacity differs from the project’s stated 500 MW / 1,000 MWh scope.
A source report alone does not establish current progress or an open buying window.
Project summary
ARENA’s listing identifies the project as AGL Energy’s Liddell large-scale battery deployment. It describes planned construction and operation of a 500 MW / 1,000 MWh grid-forming battery with advanced inverters at the retired Liddell Power Station in Muswellbrook, with a planned direct connection to TransGrid’s existing 330 kV switchyard. The listing separately reports NSW planning approval for a system of up to 500 MW / 2,000 MWh. AGL Energy Limited is listed as Lead Organisation, and the stated project period is 1 March 2024 to 31 October 2028. ARENA funding is reported as $35 million, with total project cost reported as $694.68 million. The listing gives its last-updated date as 06 May 2025.
Evidence limits and unknowns
The listing, last updated 06 May 2025, does not specify battery or inverter models or supplier identities; it states the project rating, inverter technology and planned connection.
The listing mentions procuring local content but provides no tender details, procurement schedule or current procurement status.
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Project metadata
Country
Australia Based on reviewed release evidence
Region
Oceania
Category
Energy Derived from released evidence
Physical assets
Battery Storage
Based on this release's supporting evidence. Unresolved fields remain unclassified; these labels do not establish current progress or a buying window.
Released facts and supporting evidence
Each fact retains its source, uncertainty and time context. If a publisher page moves or is unavailable, use the recorded quotation and observation date below.
Date
Source reported
The listing gives a start date of 1 March 2024 and an end date of 31 October 2028.
Attributed to arena.gov.au.
Source: arena.gov.au · publication date not recorded · observed 2026-10-15
Sources and evidence · arena.gov.au
Source published: Not recordedObserved: 2026-10-15
Planned construction and operation of a 500 MW / 1,000 MWh grid-forming battery with advanced inverters, connecting directly to TransGrid’s existing 330 kV switchyard at Liddell.
Attributed to arena.gov.au.
Source: arena.gov.au · publication date not recorded · observed 2026-10-15
Sources and evidence · arena.gov.au
Source published: Not recordedObserved: 2026-10-15
NSW planning approval has been received for a battery energy storage system of up to 500 MW / 2,000 MWh at the proposed location; this approval capacity differs from the project’s stated 500 MW / 1,000 MWh scope.
Attributed to arena.gov.au.
Source: arena.gov.au · publication date not recorded · observed 2026-10-15
Sources and evidence · arena.gov.au
Source published: Not recordedObserved: 2026-10-15
Prior and superseded states remain labelled. Dates below identify source publication when known, otherwise source observation. They are not assumed event dates; each fact retains its own time qualifications.
No material timeline events have been released.
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