How South Australia's grid-scale batteries performed in 2025: energy and FCAS market revenue, $/MW, $/MWh, top performers, and price events.
South Australia (SA1) batteries earned $55.90M in estimated gross energy and FCAS market revenue in 2025, from 12 grid-scale units tracked by NEMPulse. NEMPulse data begins 13 Apr 2025, so figures cover 13 Apr 2025–31 Dec 2025 of this period.
Normalised across 921 MW and 1,448 MWh of registered capacity, the region earned $61k/MW and $39k/MWh for the period.
Energy arbitrage supplied 83% of the total and FCAS 16%, with estimated Frequency Performance Payments adding $638k. Within FCAS, regulation accounted for 32% and contingency 68%; the single largest market was raise 6-second at $2.90M.
For context on the trading conditions, the average daily price spread (top two hours minus bottom two hours) in South Australia was $380/MWh, and the highest spot price reached $20,300/MWh.
Against the perfect-foresight energy benchmark, South Australia batteries captured 44% of what hindsight would have earned, an estimated $57.39M of unrealised upside.
On capture of the perfect-foresight energy benchmark, the strongest performers were Happy Valley Water Treatment Plant (80%), Christies Beach Wastewater Treatment Plant (77%), Bolivar Waste Water Treatment Plant (74%). At the other end: Lake Bonney BESS1 (38%), Hornsdale Power Reserve (33%), Dalrymple North BESS (24%) — capture reflects strategy, contracting and constraints as much as skill, so a low figure is not automatically underperformance.
The strongest single day was 26 Jun 2025 at $7.47M, and the best single battery-day was Blyth Battery Energy Storage System on 26 Jun 2025 with $3.18M. Revenue stays concentrated: five of the period's 263 days delivered 42% of everything South Australia batteries earned.
Blyth Battery Energy Storage System led the region with $18.73M. Full dispatch, state-of-charge and bidding detail is available on each battery's page.
South Australia saw 134 price events this period, the sharpest an extreme price event peaking at $20,300/MWh.
| Battery | Energy + FCAS | $/MW | $/MWh | Capture |
|---|---|---|---|---|
| Blyth Battery Energy Storage System | $18.73M | $94k/MW | $47k/MWh | 47% |
| Torrens Island BESS | $14.38M | $58k/MW | $58k/MWh | 43% |
| Hornsdale Power Reserve | $8.60M | $57k/MW | $44k/MWh | 33% |
| Templers Battery Energy Storage System | $3.85M | $35k/MW | $14k/MWh | 56% |
| Tailem Bend 2 Hybrid Renewable Power Station | $3.01M | $73k/MW | $73k/MWh | 50% |
| Mannum Battery Energy Storage System | $2.86M | $29k/MW | $14k/MWh | 41% |
| Lake Bonney BESS1 | $2.65M | $106k/MW | $51k/MWh | 38% |
| Dalrymple North BESS | $480k | $16k/MW | $39k/MWh | 24% |
| Happy Valley Water Treatment Plant | $457k | $114k/MW | $114k/MWh | 80% |
| Adelaide Desalination Plant | $380k | $62k/MW | $63k/MWh | 60% |
| Christies Beach Wastewater Treatment Plant | $255k | $119k/MW | $127k/MWh | 77% |
| Bolivar Waste Water Treatment Plant | $248k | $124k/MW | $124k/MWh | 74% |
Capture = actual energy revenue as a share of the perfect-foresight LP benchmark; shown only for units with material modelled upside.
Third-party reporting on these units, matched automatically and linked for context. NEMPulse does not endorse or verify external coverage.
Keep reading: NEM-wide wrap — 2025South Australia battery fleetActual vs optimal dispatchMarket eventsHow capture is calculated
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Automatically generated from AEMO public data using fixed templates (not AI-written). Figures are estimated gross market revenue (energy + FCAS) from dispatch — they exclude contracts, hedges and network-support schemes (e.g. SIPS), so actual commercial revenue will differ.
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