Eraring Big Battery

BESS · Origin Energy Electricity Limited · Storage - Battery

Dispatch stats Financials
Development AEMO: Anticipated Other - Other NEM data · 24 hours
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Registered nameplate capacity — refresh AI for MW/MWh
Est. SRMC
$1.75/MWh
Key information

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

AEMO status Anticipated
Project status Development (AI)

Coordinates —

DUID —
Owner Origin Energy Electricity Limited
Commissioned Apr 2027
Expected closure 2057
Closure date —
Technology Storage - Battery
Fuel Other - Other
Battery OEM —
Battery platform / chemistry —
Inverter OEM —
Inverter / PCS model —
Stats window
13 Jun 2026 05:05 → 14 Jun 2026 05:05 AEST

Dispatch & revenue

13 Jun 2026 05:05 → 14 Jun 2026 05:05 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
$1.75/MWh
Capex total (greenfield)
$932.24M

Shown in table
$932.24M (2026 real AUD)

Reported / source value
$798.00M (2022 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Origin announced an approximately A$450 million investment for the second phase.

Reference
Origin begins construction of 240 MW / 1,030 MWh stage of Eraring big battery (medium confidence)
Source recorded 06 Jun 2026
Capex refurbishment
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Capex / MWh storage
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Fixed OPEX (annual)
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Fixed OPEX / MW-yr
$29,206

Shown in table
$29.2k (2026 real AUD)

Reported / source value
$25.0k (2022 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
No plant-specific fixed O&M disclosure found; retained fallback default.
Variable OPEX / MWh
$1.75

Shown in table
$1.75 (2026 real AUD)

Reported / source value
$1.50 (2022 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
No plant-specific variable O&M disclosure found; retained fallback default.
Fuel cost / GJ
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Heat rate GJ/MWh
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Confidence: high · Status: ai estimated · Capex basis: reported · AI checked 06 Jun 2026

Notes
Plant-specific greenfield capex was found in NSW planning material for a 700 MW / 2,800 MWh project with capital investment of about A$798 million. This appears to relate to the full approved Eraring Big Battery project rather than a later stage only. Subsequent Origin announcements also report stage-specific investments of about A$600 million for stage 1 and A$450 million for stage 2, but the project-level figure was preferred for capex_total_aud. No plant-specific O&M disclosure was found, so server-side fallback O&M assumptions were retained.

Sources