# AGL Energy – Liddell Large Scale Battery with advanced inverters; Deployment Project
Publisher: CapexCue
Canonical dossier:
Dossier reference: release 1 (55ef16cd-7475-45a1-b65b-9fa9741f817c)
Released project intelligence
Oldest supporting observation: 2026-10-15T14:34:26.238469+00:00
Dossier released: 2026-10-15T14:42:32.426686+00:00
Source report dates and capture dates are listed per fact below; neither establishes an event date.
## 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.
Current purchasing availability: unknown.
Source-dated plans do not establish current progress or available supplier packages.
## Project metadata
Country: Australia
Region: Oceania
Physical assets: Battery Storage
Derived from the exact released evidence; unresolved fields remain unclassified.
## Project category
Energy
Derived from the reviewed scope statement; delivery stage remains unclassified.
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.
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
Project overview
Oldest decisive evidence: 2026-10-15T14:34:26.238469+00:00
Newest evidence: 2026-10-15T14:34:26.238469+00:00
Knowledge reviewed: 2026-10-15T14:41:52.996230+00:00
Publication reviewed: 2026-10-15T14:42:31.948987+00:00
## Date
The listing gives a start date of 1 March 2024 and an end date of 31 October 2028.
Status: reported
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Name
AGL Energy – Liddell Large Scale Battery with advanced inverters; Deployment Project
Status: reported
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## 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.
Status: planned
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Location
Retired Liddell Power Station, Muswellbrook, New South Wales; the station ceased operations in April 2023.
Status: reported
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Developer
AGL Energy Limited, listed as the Lead Organisation.
Status: reported
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Investment
Total project cost: $694.68 million.
Status: reported
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Regulatory
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.
Status: actual
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Source Program
Advancing Renewables Program.
Status: reported
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Financing Amount
$35 million funded by ARENA.
Status: actual
Attribution: arena.gov.au
Source: arena.gov.au — https://arena.gov.au/projects/agl-liddell-large-scale-battery-with-advanced-inverters-deployment-project/ | published unknown | observed 2026-10-15T14:34:26.238469+00:00
## Cite this dossier
CapexCue — AGL Energy – Liddell Large Scale Battery with advanced inverters; Deployment Project — dossier released 2026-10-15T14:42:32.426686+00:00, release 1 (55ef16cd-7475-45a1-b65b-9fa9741f817c) — https://capexcue.com/projects/agl-energy-liddell-large-scale-battery-with-advanced-inverters-deployment-project-efa8f9a7-031/.
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