commodity demand sa — SA1

South Australia's spot price sits at $175.22/MWh at 07:00 AEST with demand at 1,428 MW, a sharp acceleration from the $138–$146/MWh range that dominated the evening period as demand climbed through the 1,300–1,400 MW band. The two preceding intervals tell the story clearly: $166.18/MWh at 1,403 MW, then $207.69/MWh at 1,397 MW, before the current read pulls back slightly to $175.22/MWh — the price spike at $207.69/MWh occurring on essentially flat demand signals the market is sitting at a supply stack inflection point where marginal capacity is thin and dispatchers are bidding aggressively. Gas CCGT at 503 MW and OCGT at 208 MW are carrying the overnight-to-morning transition with wind contributing 173 MW and solar at zero, yielding a renewable share of just 19.58% and carbon intensity of 0.4316 tCO2/MWh — the highest point in today's data series.

The day's demand trajectory has been textbook: a trough of around 620–750 MW through the early hours (AEST 11:30–13:00), a sustained pre-dawn ramp through 04:00–06:00 AEST lifting demand from ~350 MW to ~760 MW, then a sharp morning ramp to current levels. Prices tracked this ramp tightly — sub-$10/MWh through the overnight trough, rising to the $80–$115/MWh range from 04:00 AEST as morning load built, and now breaching $175/MWh as demand pushes toward 1,430 MW. The sensitivity is pronounced: each 100 MW addition on the morning ramp has corresponded to roughly $10–$15/MWh of incremental price pressure, but the final steps above 1,400 MW are producing outsized responses, indicating the upper portion of the gas stack is now setting price.

Forward forecasts point to the 07:30 AEST trading period (21:00 UTC) at $177.56/MWh, consistent with continued demand growth into the working-day peak. Demand typically reaches its morning apex in SA between 08:00–09:30 AEST on autumn weekdays before easing through the midday period — the price history from earlier in this trading day confirms that pattern, with prices sustaining $125–$149/MWh through the 18:30–20:00 AEST window (09:30–11:00 UTC). A notable market notice risk is active: AEMO has flagged prices for intervals from 03:45 through 06:30 AEST today as subject to review under Clause 3.9.2B for manifestly incorrect inputs, with one interval (05:15 AEST) already confirmed unchanged. Traders should monitor settlement outcomes for those early-morning intervals, as retrospective price revisions — while historically unlikely under MII — would affect any positions settled against those dispatch prices.

The immediate outlook is for prices to remain elevated in the $150–$180/MWh range through the morning peak before demand-side relief emerges as commercial load stabilises post-09:00 AEST and solar generation begins to contribute. The absence of wind (5.1 km/h, 0.2 wind potential) and full cloud cover (89%) suppressing solar removes