Commodity Demand — SA1: Friday 15 May 2026

South Australia's spot price sits at $138/MWh at 06:35 AEST against demand of 1,266 MW — a striking price-to-demand relationship that defines today's early morning dynamic. Demand is near its lowest point of the past 24 hours; the day's peak of approximately 1,798 MW was observed around 08:10–08:30 AEST at prices in the $54–$65/MWh range, demonstrating that SA's current elevated pricing is not a demand-volume event. Instead, it reflects a supply adequacy and system security premium: wind is generating 818 MW, gas OCGT 129 MW, gas CCGT 58 MW, and battery 27 MW, with solar at zero in the pre-dawn period. The carbon intensity is 0.1085 tCO2/MWh with renewables at 81.9%. The price spike to $176/MWh at 05:40 AEST and sustained prints above $120/MWh since approximately 05:55 AEST are occurring at demand levels 500 MW below today's peak — confirming the driver is marginal supply tightness, not bulk load.

The demand trajectory through today shapes a clear price outlook. The 06:00 AEST low of ~1,226 MW is the trough; demand is already climbing and forecast runs confirm this pattern. The morning ramp toward the 1,700–1,800 MW range — consistent with today's actual peak — historically pressured SA prices into the $60–$75/MWh band, which is exactly where the price history shows prices settled during the 07:00–12:00 AEST window. As demand retreated through the afternoon to the 1,270–1,380 MW range, prices collapsed to $9–$35/MWh between roughly 13:30 and 18:00 AEST. That mid-afternoon softening is the standout demand-price sensitivity pattern for today: every 100 MW of demand reduction from the morning peak was broadly associated with a $5–$15/MWh price decline, until the demand floor was reached and gas dispatch was no longer required on the margin.

The evening repricing from ~18:45 AEST — jumping from $26/MWh to $98/MWh with demand still below 1,285 MW — is the critical signal for today's remaining price outlook. It confirms SA's evening price is being set by system strength and synchronous inertia requirements, not demand volume. Market notices corroborate this: AEMO directed AGL's Barker Inlet Power Station to synchronise at 15:55 AEST for voltage control, with that intervention event cancelled at 16:35 AEST (Market Notice 144087/144089). The prior evening's pattern of similar voltage-driven interventions on 14 May and 6 May indicates this is a recurring structural dynamic at low-synchronous-generation conditions. Demand forecast for the coming hours is consistent with the Saturday morning ramp — expect sub-1,300 MW through early morning AEST (06:00–09:00 AEST local) before climbing to the 1,600–1,700 MW range by mid-morning.

The near-term price forecast from AEMO's predispatch as of 06:01 AEST targets $138/MWh for the 07:00 AEST interval, then moderates sharply — forecasts for the 07:30