Mt Stuart (MSTUART2)

Gas Peakers · Origin Energy Mt Stuart · Turbine - OCGT

Dispatch stats Financials
Operational AEMO: In Service QLD1 Fossil - Diesel NEM data · 24 hours
146 MW
Registered nameplate capacity
24 hours revenue
$4.7k
Capacity factor
1.9%
Revenue / MWh
$68.68
Est. SRMC
$148.45/MWh

Energy flow

Dispatch target (cleared) vs availability — 5‑minute intervals. QLD1 regional price (RRP) on right axis.

Key information
Capacity
146 MW

AEMO status In Service
Project status Operational (AI)

Origin Energy generation page (originenergy.com.au) notes Mt Stuart is in-service and uses an OCGT system supplying the NEM.

Region QLD1
MLF 0.9121
DUID MSTUART2
Owner Origin Energy Mt Stuart
Commissioned —
Expected closure 2025-07-02
Closure date —
Technology Turbine - OCGT
Fuel Fossil - Diesel
Equipment OEM Mitsubishi
Equipment type / model gas turbine OCGT
Secondary OEM GE Vernova
Secondary equipment electrical generator
Equipment confidence medium
Stats window
03 Jun 2026 22:00 → 04 Jun 2026 22:00 AEST

Dispatch & revenue

03 Jun 2026 22:00 → 04 Jun 2026 22:00 AEST

Revenue (× MLF)
$4.7k
Dispatched
67.8 MWh
Available
839.5 MWh
Curtailed
839.5 MWh
Curtailment
100.0%
of available
MLF used
0.9121
end of period

Revenue (× MLF)

Estimated $ per interval using regional RRP and MLF effective on each day.

Methodology & assumptions

  • Dispatch & availability — AEMO Next Day Dispatch UNIT_SOLUTION (5‑minute intervals). Intervention intervals excluded.
  • Regional price — dispatch_price RRP matched by settlement time and NEM region (from generator registry).
  • Revenue (× MLF) — cleared MW × (5/60 h) × RRP × MLF. Chart uses MLF effective on each interval’s date; summary total uses MLF as at the end of the selected period (same as the revenue list).
  • Curtailment — estimated economic curtailment when availability exceeds dispatch target: max(0, availability − cleared) × (5/60) MWh.
  • Not settlement — estimates only. AEMO settlement applies DLF, rebids, constraints, and other factors not modelled here.
MLF history (AEMO daily)
Effective fromMLF
2024-07-01 0.9471
2025-07-01 0.9121

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
OCGT
Capacity
146 MW
Revenue (× MLF) (stats)
See dispatch stats link above
Est. SRMC
$148.45/MWh
Capex total (greenfield)
$146.50M

Shown in table
$146.50M (2026 real AUD)

Reported / source value
$92.00M (2008 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Reported investment amount for the Mt Stuart expansion.

Reference
North set to benefit from power boost (high confidence)
Source recorded 04 Jun 2026
Capex refurbishment
—
Capex / MW derived
$1,003,403

Shown in table
$1.00M (2026 real AUD)

Reported / source value
$630.1k (2008 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Calculated from reported project cost divided by registered capacity provided in the user prompt.

Reference
North set to benefit from power boost (medium confidence)
Source recorded 04 Jun 2026
Fixed OPEX (annual)
$9.25M

Shown in table
$9.25M (2026 real AUD)

Reported / source value
$5.83M (2008 nominal)
Table total may differ if recalculated from $/MW × registered capacity after CPI adjustment.
Fixed OPEX / MW-yr
$63,376

Shown in table
$63.4k (2026 real AUD)

Reported / source value
$39.8k (2008 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Used as a benchmark proxy for fixed O&M.

Reference
2024 Energy Technology Cost and Technical Parameter Review (medium confidence)
Source recorded 04 Jun 2026
Variable OPEX / MWh
$7.45

Shown in table
$7.45 (2026 real AUD)

Reported / source value
$4.68 (2008 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Used as a benchmark proxy for variable O&M.

Reference
2024 Energy Technology Cost and Technical Parameter Review (medium confidence)
Source recorded 04 Jun 2026
Fuel cost / GJ default
$12.00

Shown in table
$12.00 (2026 real AUD)
Heat rate GJ/MWh
11.75

Shown in table
$11.75 (2026 real AUD)

How this was derived
Used as a reasonable OCGT heat-rate proxy.

Reference
Heat rates (medium confidence)
Source recorded 04 Jun 2026

Confidence: medium · Status: ai estimated · Capex basis: reported · AI checked 04 Jun 2026

Notes
Mt Stuart is an Origin peaking power station in Townsville. A Queensland Government statement reported Origin would invest $92 million in a new 126 MW turbine generator at Mt Stuart; this is treated here as the plant-specific brownfield expansion cost rather than a full greenfield build cost. Mt Stuart is described by Origin as operational since 1999 and uses an open-cycle gas turbine system fuelled by extra low sulphur diesel. O&M and heat-rate assumptions are benchmark-based proxies for an OCGT asset; no site-specific O&M or diesel price was found in the search results.

Sources