commodity demand qld — QLD1

Queensland spot price sits at $78.93/MWh with demand at 5,886 MW as of 6:30 AEST this Saturday morning. That current price level reflects a market well past its morning peak: demand climbed sharply from an overnight trough of around 4,850 MW to a daily high of approximately 8,143 MW between 17:05 and 17:10 AEST, with prices tracking that ramp almost precisely — peaking at $117.73/MWh at 17:05 AEST before easing as demand rolled off. The price-to-demand relationship through that morning peak was tight, with every interval above 8,000 MW clearing above $92/MWh. As demand has since fallen nearly 2,300 MW from that peak, prices have compressed by roughly $39/MWh, illustrating the steep marginal cost curve that applies at high-load conditions in QLD.

The overnight period revealed a striking demand-price inversion: between roughly 13:30 and 14:30 AEST (03:30–04:30 UTC), demand was rising through 5,200–5,900 MW yet spot prices cleared at zero or negative values (as low as -$5.00/MWh), driven by surplus generation conditions. That negative pricing window coincided directly with the steepest part of the demand ramp-up, confirming that supply-side oversupply — not demand — was the binding constraint in those intervals. Prices snapped back to $50–$95/MWh once demand cleared approximately 6,300 MW around 15:20 AEST, marking the threshold at which the surplus was absorbed.

The forward forecast points to a significant price step-down from current levels. The 07:00 AEST half-hour is forecast at $64.73/MWh, the 07:30 interval at $21.54/MWh, and the 08:00 interval at negative prices around -$2.73/MWh — consistent with solar generation building as daylight increases on a Saturday with suppressed commercial demand. Being a weekend, the morning demand ramp is less pronounced than on weekdays, and the absence of large industrial and commercial load means the grid is likely to enter surplus conditions earlier in the morning. Load windows across the 08:00–09:30 AEST window are consistently forecast negative, with the deepest values reaching around -$39/MWh around 09:00 AEST, representing the expected midday solar generation peak period.

For traders and demand-side participants, the actionable window is narrow: prices remain above $60/MWh now but are forecast to fall sharply within the next two half-hour intervals. Flexible loads that can shift consumption into the 07:30–11:00 AEST window stand to capture strongly negative to low-positive prices. The evening demand recovery — which today's data shows typically drives QLD prices back above $60–$80/MWh from around 05:00 AEST (19:00 local) — is likely to repeat this evening, though at a lower peak given the Saturday demand profile. Black coal at 2,161 MW and hydro at 87 MW are the dominant dispatched sources at this interval, with solar contributing only 2 MW as sunrise approaches.