Commodity Demand — NSW1: Thursday 17 September 2026
NSW spot price sits at $113.94/MWh as of 06:30 AEST, with demand at 8,213 MW and climbing through the morning ramp. The evening peak has already produced sharper volatility than the current print suggests — the 20:10–20:20 AEST interval spiked to $162.52 and $189.08/MWh as demand pushed through 7,950-8,050 MW, before easing back to $113.94/MWh as demand ticked up to 8,213 MW. This confirms NSW's price-demand relationship remains steep above the 8,000 MW mark: every 100-150 MW of incremental demand above that threshold is adding $15-30/MWh to the marginal price, consistent with black coal (currently 5,354 MW, the dominant source) and gas peakers being pushed up the stack.
Overnight, the pattern was the inverse. Demand troughed near 4,540-4,900 MW between 03:00-05:00 AEST, and prices fell into negative territory repeatedly (-$5 to -$10/MWh) as wind (476 MW) and rooftop solar combined with baseload to oversupply the low-demand window. Demand then built steadily from the 06:00 AEST trough of 6,595 MW to over 9,300 MW by mid-morning (08:30-09:30 AEST), tracking price through the $95-135/MWh band — this morning's ramp was the sharpest volatility window of the last 24 hours, with five-minute prices swinging from $65 to $135/MWh as demand rose roughly 2,700 MW in three hours.
Today's forecast trajectory points to a second, more moderate peak. AEMO's dispatch forecasts show prices firming from a flat/negative overnight trough (-$10/MWh forecast for 02:00-04:00 AEST tomorrow) through a morning climb to $88-97/MWh by 08:00-11:00 AEST, then a midday peak of $122/MWh forecast around 12:30 AEST before easing to $84-91/MWh through the afternoon and evening. Demand is expected to follow the familiar dual-peak profile — a morning ramp into the high-8,000s/low-9,000s MW range, a midday plateau, and a secondary evening peak from roughly 17:00 AEST as heating load builds against today's cool start (8.6°C, minimal solar/wind potential this morning improving to 38% solar potential by afternoon per the daily outlook).
No NSW-specific demand-side interventions are currently in force — active market notices are concentrated on SA voltage control directions and minimum system load conditions forecast for 19 September, with no constraints affecting NSW dispatch today. Carbon intensity has risen to 0.656 tCO2/MWh (25.4% renewable) as coal and gas cover the demand ramp, up from the overnight low of 0.38 tCO2/MWh when renewable penetration peaked above 56%. Traders should watch the 08:00-11:00 AEST window and any afternoon re-tightening past 8,500 MW as the key price-risk periods for the remainder of the day.