Tailem Bend Battery Project (TB2BG1)

BESS · Vena Energy · Storage - Battery

Dispatch stats Financials
Development AEMO: Committed SA1 Other - Other NEM data · 24 hours
42/84 MW
Registered nameplate capacity / storage
Est. SRMC
$0.00/MWh
Key information
Capacity
42 MW / 84 MWh

AEMO status Committed
Project status Development (AI)

Region SA1
Coordinates —

DUID TB2BG1
Owner Vena Energy
Commissioned Jan 2024
Expected closure 2048
Closure date —
Technology Storage - Battery
Fuel Other - Other
Battery OEM —
Battery platform / chemistry —
Inverter OEM —
Inverter / PCS model —
Stats window
12 Jun 2026 14:05 → 13 Jun 2026 14:05 AEST

Dispatch & revenue

12 Jun 2026 14:05 → 13 Jun 2026 14:05 AEST

No dispatch data for DUID TB2BG1 in this period.

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
42 MW / 84 MWh
Revenue (× MLF) (stats)
See dispatch stats link above
Est. SRMC
$0.00/MWh
Capex total (greenfield)
$31.01M

Shown in table
$31.01M (2026 real AUD)

Reported / source value
$29.40M (2024 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Confirms a later Tailem Bend BESS project, but gives no cost for the 41.5 MW unit.

Reference
Vena Energy Breaks Ground on 408 MWh Battery Energy Storage System in South Australia (low confidence)
Source recorded 06 Jun 2026
Capex refurbishment
—
Capex / MWh storage derived
$369,198

Shown in table
$369.2k (2026 real AUD)

Reported / source value
$350.0k (2024 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).
Fixed OPEX (annual)
$236.4k

Shown in table
$236.4k (2026 real AUD)

Reported / source value
$224.1k (2024 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).
Fixed OPEX / MW-yr
$5,696

Shown in table
$5.7k (2026 real AUD)

Reported / source value
$5.4k (2024 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Uses the 1-hour BESS fixed O&M benchmark from the AEMO/Aurecon review.

Reference
2024 Energy Technology Cost and Technical Parameter Review (high confidence)
Source recorded 06 Jun 2026
Variable OPEX / MWh
$0.00

Shown in table
$0.00 (2026 real AUD)

Reported / source value
$0.00 (2024 nominal)
Adjusted to 2026 real AUD using Australian CPI (All Groups).

How this was derived
Source indicates no separate variable O&M for the BESS benchmark.

Reference
2024 Energy Technology Cost and Technical Parameter Review (high confidence)
Source recorded 06 Jun 2026
Fuel cost / GJ
—
Heat rate GJ/MWh
—

Confidence: medium · Status: ai estimated · Capex basis: default · AI checked 06 Jun 2026

Notes
No plant-specific greenfield capex figure was found for the 41.5 MW Tailem Bend 2 battery. Vena Energy project pages confirm the 41.5 MW BESS and 2024 COD, but do not disclose a standalone construction cost. Fallback operating assumptions use AEMO/Aurecon 2024 BESS parameters for a 1-hour lithium-ion BESS: 84% round-trip efficiency, 20-year life, and $5,400/MW-year fixed O&M. Variable O&M is treated as nil in the source table for BESS.

Sources