Commodity Demand — QLD1: Wednesday 16 September 2026
Queensland spot price sits at $85.71/MWh at 06:30 AEST, with demand at 6,249 MW — tracking the tail end of the morning ramp after peaking near 7,540 MW around 08:40-09:00 AEST yesterday's equivalent period, when prices held in the $95-120/MWh band. That morning demand build from ~4,000 MW overnight (00:00-05:00 AEST) to above 7,000 MW by 07:00 AEST drove a price response of roughly $6/MWh at the trough to consistently above $100/MWh through mid-morning, confirming a tight demand-price coupling once load pushes past the 6,500 MW mark.
The overnight trough shows extreme price sensitivity at the low end: demand below 4,200 MW between 23:00-04:00 AEST correlates with negative pricing, down to -$6.40/MWh, as low overnight load combined with wind generation (1,186 MW currently) and minimal underlying thermal flexibility pushes prices below zero. Every 500 MW of demand recovery through the morning ramp (04:00-08:00 AEST) added roughly $15-20/MWh to spot price, indicating the region operates close to its marginal thermal stack once black coal (5,179 MW currently, dominant baseload) is fully committed and gas peaking (99 MW OCGT) starts setting price at the margin.
AEMO's forecast trajectory points to a firmer day: forecast RRP climbs from $65/MWh at 07:00 AEST to a peak of $107.69/MWh at 09:30 AEST, holding above $99/MWh through midday before easing to $78-85/MWh by late afternoon and evening. This shape mirrors typical Thursday demand build — solar contribution (245 MW currently, rising through the day per 13.1% average solar potential forecast for today) will cap midday price growth, but the lack of strong wind (2.1% average wind potential today, weak compared to recent days) removes a key downward price lever seen overnight. Traders should watch the 08:00-11:00 AEST window as the highest-probability period for price spikes above $100/MWh given the demand-price elasticity observed this morning, with overnight negative pricing "in the bank" for any load-shifting strategies given tonight's forecast prices sit at -$6 to -$7/MWh from 22:00 AEST through 05:00 AEST tomorrow.