Great Western Battery Project

BESS · Neoen Australia Pty Ltd · Storage - Battery

Dispatch stats Financials
Development AEMO: Publicly Announced Other - Other NEM data · 24 hours
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Registered nameplate capacity — refresh AI for MW/MWh
Est. SRMC
$1.50/MWh
Key information

Capacity not yet researched — use Refresh equipment & project status (AI).

AEMO status Publicly Announced
Project status Development (AI)

Coordinates —

DUID —
Owner Neoen Australia Pty Ltd
Commissioned Dec 2028
Expected closure —
Closure date —
Technology Storage - Battery
Fuel Other - Other
Battery OEM —
Battery platform / chemistry —
Inverter OEM —
Inverter / PCS model —
Stats window
13 Jun 2026 09:20 → 14 Jun 2026 09:20 AEST

Dispatch & revenue

13 Jun 2026 09:20 → 14 Jun 2026 09:20 AEST

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Financial overview

2026 real AUD. Monetary values are CPI-adjusted to 2026 real Australian dollars. Greenfield capex uses AEMO benchmarks when plant-specific cost is unknown.
Type
Battery (BESS)
Capacity
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Revenue (× MLF) (stats)
See dispatch stats link above
Est. SRMC
$1.50/MWh
Capex total (greenfield)
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How this was derived
This is a portfolio-level investment statement across six awarded projects, not a project-specific capex figure for Great Western Battery.

Reference
ASL tenders (medium confidence)
Source recorded 08 Jun 2026
Capex refurbishment
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Capex / MWh storage
$369,198

Shown in table
$369.2k (2026 real AUD)

Reported / source value
$350.0k (2024 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).
Fixed OPEX (annual)
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Fixed OPEX / MW-yr
$4,958

Shown in table
$5.0k (2026 real AUD)

Reported / source value
$4.7k (2024 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Provides the benchmark fixed O&M assumption used as fallback for a large-scale lithium-ion battery.

Reference
2023 Cost and Technical Parameters Review Final Report (high confidence)
Source recorded 08 Jun 2026
Variable OPEX / MWh default
$1.50

Shown in table
$1.50 (2026 real AUD)
Fuel cost / GJ
—
Heat rate GJ/MWh
—

Confidence: medium · Status: ai estimated · Capex basis: default · AI checked 08 Jun 2026

Notes
Project-specific capex amount was not found in the searched owner, government, or project sources. NSW Government tender materials confirm Great Western Battery (Wallerawang) as a 330 MW / 3,500 MWh project and state the tender round secures at least $4.82 billion of investment across six awarded projects, but this is a portfolio-level figure rather than a project-specific construction cost. For operating assumptions, the battery O&M fallback uses AEMO/Aurecon large-scale BESS benchmark fixed O&M of $4,700/MW-yr (2023/24 review basis) and a 20-year asset life assumption. No refurbishment cost identified.

Sources