BESS · Eku Energy Projects (Australia) Trust · Storage - Battery
24 Sep 2026 00:00 → 24 Sep 2026 23:59 AEST
| Capex total (greenfield) |
$496.30M
Shown in table How this was derived Reference |
|---|---|
| Capex refurbishment |
—
|
| Capex / MW derived |
$1,654,333
Shown in table |
| Fixed OPEX (annual) |
$6.36M
Shown in table How this was derived Reference |
| Fixed OPEX / MW-yr |
$21,200
Shown in table How this was derived Reference |
| Variable OPEX / MWh |
—
How this was derived Reference |
| Fuel cost / GJ |
—
|
| Heat rate GJ/MWh |
—
|
Confidence: medium · Status: ai estimated · Capex basis: estimated · AI checked 04 Jun 2026
Notes
Eku Energy states Arundel BESS is now Wagga South BESS: a proposed 300 MW / 1,200 MWh lithium-ion BESS in development near Gregadoo, anticipated operational in 2030 with proposed operational life of 20+ years. No project-specific capex, O&M, EPC award, supplier, financing, offtake/tolling or final investment decision was found. Capex is therefore estimated using Aurecon/AEMO 2024 BESS cost parameters for a 4-hour standalone 200 MW lithium-ion BESS with dedicated grid connection: AUD 525/kW power component plus AUD 274/kWh energy component, scaled to 300 MW / 1,200 MWh, plus AUD 10 million land/development allowance. This gives AUD 486.3 million EPC and AUD 496.3 million including land/development. Fixed opex is estimated using Aurecon 4-hour BESS O&M of AUD 12,800/MW-year plus AUD 8,400/MW-year extended warranty for 20-year battery life, total AUD 21,200/MW-year. Variable O&M is left null because Aurecon states BESS long-term service agreements are not typically structured as fixed/variable. Beginning-of-life round-trip efficiency is 85% at the point of connection. Direct operational emissions are set to zero; NSW EPA states BESS emissions are taken to be zero because they store electricity rather than generate emissions. Major closure/refurbishment note: GHD estimates 4-hour large-scale BESS retirement cost at AUD 94,000/MW, implying about AUD 28.2 million for 300 MW, with retirement including grid disconnection, battery module removal, cabling recovery and civil structure removal; Aurecon notes 20-year life may be extended to about 25 years depending on condition assessment and battery upgrades.