Commodity Demand — VIC1: Tuesday 1 September 2026
Victoria's spot price sits at $75.87/MWh at 6:25am AEST, tracking demand of 5,393 MW as the morning ramp builds — up from 4,412 MW at last evening's 7pm trough. The price-demand relationship over the past 24 hours is stark: overnight minimum demand of roughly 3,280 MW between 1pm and 3:30pm AEST yesterday (the trading day just completed) coincided with prices pinned near zero or negative, dropping as low as -$60/MWh, while the current evening ramp toward 5,400 MW has pushed prices back into the $60-76/MWh range. Each 1,000 MW of demand growth through the evening peak window has been accompanied by roughly $50-60/MWh of price uplift, reflecting brown coal and battery dispatch being progressively drawn on as wind output (currently 1,161 MW) and negligible solar (0 MW after dark) can't cover the load.
The forecast trajectory points to a sharp overnight easing: prices are expected to fall from $75.85/MWh at 9pm to single digits by midnight, then flatten near $0-10/MWh through the 4am-6am low-demand window as minimum demand troughs. The real story for today, however, is the 8:30am-10:30am AEST period, where forecast prices spike to $88-99/MWh — a sign the market is pricing in a solar-limited morning (cloud cover sits at 100% currently, solar potential at 0%) combined with rising commercial and industrial demand. This is the peak price risk window for today's session, distinct from the typical evening peak.
Demand-side risk factors are limited for Victoria specifically today, though traders should note the active AEMO constraint set CA_SYDS_59A889E5 on the V-SA and V-S-MNSP1 interconnectors, invoked to manage power system security — this could restrict Victoria's ability to import or export during periods of tight supply, amplifying local price volatility if the morning solar-deficit price spike materialises. Carbon intensity has also risen to 0.8644 tCO2/MWh with renewable penetration at just 29.15%, well below the 52-58% seen overnight, consistent with brown coal and battery covering the load as wind eases and solar remains dormant under heavy cloud.
Weather-wise, today's cloud cover (65% average) and modest wind potential (0.8%) suggest renewables will offer limited price relief through the day, reinforcing the risk that the forecast morning price spike could overshoot if demand tracks toward the top of expectations. The overnight forecast turning negative from 4pm tomorrow (into Wednesday evening) is not relevant to today's window but confirms the demand-price relationship remains tightly coupled to the solar/wind supply gap rather than absolute demand alone.