Hallett GT (AGLHAL)

Gas Peakers · EnergyAustralia Hallett Pty Ltd · Turbine - OCGT

Dispatch stats Financials

Operational AEMO: In Service SA1 Fossil - Natural Gas Pipeline NEM data · 18h

277 MW

Registered nameplate capacity

18h revenue

Capacity factor

0.0%

Revenue / MWh

—

Est. SRMC

$100.22/MWh

Energy flow

Dispatch target (cleared) vs availability — 5‑minute intervals. SA1 regional price (RRP) on right axis.

Capacity

277 MW

AEMO status In Service

Project status Operational (AI)

EnergyAustralia Hallett Power Station page describes the station as an existing peaking asset; GEO/Wikipedia show it was commissioned in 2001/2002 and is in service.

Region SA1

Coordinates -33.34870, 138.75170 (AI)

Global Energy Observatory profile for AGL Hallett OCGT Power Plant lists coordinates at Hallett, Canowie, South Australia.

MLF 0.9663

DUID AGLHAL

Owner EnergyAustralia Hallett Pty Ltd

Commissioned —

Expected closure 2036

Closure date —

Technology Turbine - OCGT

Fuel Fossil - Natural Gas Pipeline

Gas turbine OEM GE Vernova

Turbine / engine model LM6000

Equipment confidence medium

Dispatch & revenue

13 Jun 2026 00:00 → 13 Jun 2026 17:50 AEST

Energy revenue (× MLF)

FCAS revenue (× MLF)

FCAS volume

— MWh

Dispatched

— MWh

Available

673.7 MWh

Curtailed

673.7 MWh

Curtailment

100.0%

of available

MLF used

0.9663

end of period

Revenue (× MLF)

Estimated $ per interval — energy (RRP) and FCAS (regional FCAS prices), both × MLF.

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).
Energy revenue (× MLF) — cleared MW × (5/60 h) × RRP × MLF.
FCAS revenue & volume — cleared FCAS MW from DISPATCHLOAD (raise/lower 6s, 60s, 5min, reg) × (5/60 h) × regional FCAS price × MLF. Volume is total FCAS enablement MWh across services.
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 from	MLF
2024-07-01	0.9565
2025-07-01	0.9663

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.

Capex total (greenfield)	$123.42M Shown in table $123.42M (2026 real AUD) Reported / source value $117.00M (2024 nominal) Adjusted to 2026 real AUD using Australian CPI (All Groups). How this was derived This is a transaction price, not plant construction capex, so it was not used as capex_total_aud. Reference Our history \| EnergyAustralia (high confidence) Source recorded 08 Jun 2026
Capex refurbishment	—
Capex / MW derived	$445,777 Shown in table $445.8k (2026 real AUD) Reported / source value $422.6k (2024 nominal) Adjusted to 2026 real AUD using Australian CPI (All Groups).
Fixed OPEX (annual)	$4.11M Shown in table $4.11M (2026 real AUD) Reported / source value $3.89M (2024 nominal) Adjusted to 2026 real AUD using Australian CPI (All Groups).
Fixed OPEX / MW-yr	$14,838 Shown in table $14.8k (2026 real AUD) Reported / source value $14.1k (2024 nominal) Adjusted to 2026 real AUD using Australian CPI (All Groups). How this was derived Used as the OCGT fixed O&M benchmark. Reference 2023 Cost and Technical Parameters Review (high confidence) Source recorded 08 Jun 2026
Variable OPEX / MWh	$4.94 Shown in table $4.94 (2026 real AUD) Reported / source value $4.68 (2024 nominal) Adjusted to 2026 real AUD using Australian CPI (All Groups). How this was derived Used as the OCGT variable O&M benchmark. Reference 2024 Energy Technology Cost and Technical Parameter Review (high confidence) Source recorded 08 Jun 2026
Fuel cost / GJ default	$12.00 Shown in table $12.00 (2026 real AUD)
Heat rate GJ/MWh	7.94 Shown in table $7.94 (2026 real AUD) How this was derived Used as the OCGT heat-rate benchmark. Reference 2023 Cost and Technical Parameters Review (high confidence) Source recorded 08 Jun 2026

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

Notes
No project-specific greenfield capex announcement for Hallett GT was found in the searched sources. The plant is an existing gas-fired station built in 2001 and has an installed capacity of 235 MW on the owner site, while the requested DUID capacity is 276.86 MW; the difference suggests the DUID may represent aggregated or differently scoped units/site naming. O&M and thermal performance were benchmarked from AEMO/Aurecon OCGT reference data; fuel cost was not directly sourced.

Sources

capacity_mw_context — Hallett Power Station | EnergyAustralia (medium)
capex_total_aud — Our history | EnergyAustralia (high)
commissioned_date — Hallett Power Station | EnergyAustralia (high)
emissions_intensity_tco2_mwh (low)
fixed_opex_per_mw_year_aud — 2023 Cost and Technical Parameters Review (high)
fuel_type — Hallett Power Station | EnergyAustralia (high)
heat_rate_gj_per_mwh — 2023 Cost and Technical Parameters Review (high)
owner — Electricity Generation Licence (high)
site_name — Hallett Power Station | EnergyAustralia (high)
variable_opex_per_mwh_aud — 2024 Energy Technology Cost and Technical Parameter Review (high)