Mornington BESS (MRNBESS1)

BESS · Mornington BESS Project Pty Ltd as Trustee of Mornington BESS Project Trust · Storage - Battery

Asset Watch Dispatch stats Financials

Construction AEMO: Committed VIC1 Other - Other NEM data · 24 hours

240/480 MW

Registered nameplate capacity / storage

24 hours revenue

$28.8k

Capacity factor

-6.3%

Revenue / MWh

—

Est. SRMC

$1.50/MWh

Energy flow

Dispatch target (cleared) vs availability — 5‑minute intervals. VIC1 regional price (RRP) on right axis.

Capacity

240 MW / 480 MWh

AEMO status Committed

Project status Construction (AI)

BW ESS project page (bw-ess.com) describes Mornington BESS as 'currently under construction' at Tyabb.

Region VIC1

Coordinates -38.22800, 145.17800 (AI)

BW ESS project page (bw-ess.com) says the project is at Tyabb on Victoria's Mornington Peninsula, adjacent to AusNet's Tyabb substation.

MLF 0.9971

DUID MRNBESS1

Owner Mornington BESS Project Pty Ltd as Trustee of Mornington BESS Project Trust

Commissioned Feb 2026

Expected closure 2046

Closure date —

Technology Storage - Battery

Fuel Other - Other

Battery OEM Unknown

Battery platform / chemistry Battery energy storage system

Inverter OEM Unknown

Inverter / PCS model Unknown

Equipment confidence low

Dispatch & revenue

03 Nov 2026 00:00 → 03 Nov 2026 23:59 AEST

Energy revenue (× MLF)

$28.8k

FCAS revenue (× MLF)

FCAS volume

— MWh

Dispatched

-360.4 MWh

Available

3,637.7 MWh

Curtailed

3,998.1 MWh

Curtailment

109.9%

of available

MLF used

0.9971

end of period

Revenue (× MLF)

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

🔋 State of charge

Stored energy at the start of each 5‑minute interval (AEMO INITIAL_ENERGY_STORAGE). Available up to the latest next‑day dispatch file.

261.6 MWh 55%

at 03 Nov 23:55 · of 480 MWh registered

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.
State of charge — INITIAL_ENERGY_STORAGE (MWh at interval start) from UNIT_SOLUTION, published for bidirectional/storage units. Next-day data — the SOC line lags real time by up to a day.
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
2026-03-17	0.9984
2026-07-01	0.9971

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) default	$168.00M Shown in table $168.00M (2026 real AUD)
Capex refurbishment	—
Capex / MWh storage default	$350,000 Shown in table $350.0k (2026 real AUD)
Fixed OPEX (annual)	—
Fixed OPEX / MW-yr default	$25,000 Shown in table $25.0k (2026 real AUD)
Variable OPEX / MWh default	$1.50 Shown in table $1.50 (2026 real AUD)
Fuel cost / GJ	—
Heat rate GJ/MWh	—

Confidence: unknown · Status: needs review · Capex basis: unknown