Commodity Demand — SA1: Sunday 17 May 2026

$204.94/MWh is the current SA spot price at 06:05 AEST, with demand sitting at 1,375 MW — a sharp step up from the overnight trough of around 587 MW recorded at 14:20 AEST and well above the early-evening floor near 1,251 MW seen around 04:55 AEST. The price-demand relationship across today's data is pronounced: every major demand ramp has driven prices north of $170/MWh, with the morning peak band between 18:30–19:30 AEST (1,583–1,624 MW) producing a sustained run of prices from $149 to $196/MWh. The current demand level of 1,375 MW is tracking in a second evening climb, and the market is responding accordingly — the last six intervals have printed between $170 and $232/MWh, including a $231.96/MWh spike at 06:30 AEST.

The overnight demand profile illustrates the sensitivity clearly: demand dropped to a daily minimum of around 587 MW at roughly 14:20 AEST, at which point prices compressed to near the market floor around $103–$121/MWh. As demand recovered through the morning ramp from 15:30 AEST onward, prices stepped up in tandem — clearing $138/MWh by 16:00 AEST, breaking $186/MWh at 17:00 AEST (1,269 MW), and pushing through $215/MWh when demand crossed 1,400 MW shortly after 17:15 AEST. The generation mix now comprises 491.95 MW of gas OCGT, 535.15 MW of gas CCGT, 60 MW of wind, and 0.44 MW of battery, with solar at zero — the absence of solar at this hour concentrates all marginal response in gas, which is the key price driver. Carbon intensity is 0.5351 tCO2/MWh with renewables at just 5.56%.

Forecast prices for the next two trading periods signal further upward pressure. The most recent forecast prints $258.74/MWh for the 07:00 AEST half-hour and $271.95/MWh for 07:30 AEST, consistent with demand continuing to build through the early-morning weekday ramp. Multiple forecast runs over the past several hours have clustered in the $230–$280/MWh range for these periods, giving the outlook reasonable confidence. Murraylink remains on a zero-flow constraint (I-ML_ZERO) following an unplanned outage, reducing SA's interconnector options with Victoria and placing more weight on in-region gas dispatch to meet rising demand — a structural factor tightening the price-demand relationship for the duration of the outage.

Demand is likely to continue climbing through the 07:00–09:30 AEST window on a Monday as commercial and industrial load comes online. With solar output remaining near zero until after 08:30 AEST, wind generation currently low at 60 MW, and Murraylink constrained, any demand level above 1,400 MW will depend almost entirely on gas dispatch to balance. The current grid stress score of 81.9 out of 100 reflects this tight supply margin, and traders should treat prices in the $250–$280/MWh band as the base case for the next two to three hours barring a