Commodity Demand — NSW1: Tuesday 15 September 2026
NSW demand sits at 7,767 MW as of 06:30 AEST, with spot price at $103.91/MWh — up sharply from the sub-$70/MWh band that held through most of the overnight and morning periods. The price trajectory over the past 24 hours shows textbook demand sensitivity: overnight troughs near 4,300-4,700 MW between 01:00-04:00 AEST drove prices deeply negative (as low as -$10.10/MWh), while this evening's ramp back above 7,700 MW has pushed prices into the $90-115/MWh range, peaking at $114.54/MWh at 20:20 AEST on demand of 7,769 MW.
The demand-price relationship today is steep and non-linear. Below roughly 6,500 MW, prices are compressed near zero or negative as renewables and must-run baseload exceed underlying demand. Above 8,000 MW, the market has consistently cleared in the $70-90/MWh band through the day, with black coal at 5,178 MW carrying the bulk of load alongside wind (873 MW), hydro (661 MW), and battery output (428 MW) supplementing during the tightest periods. The current generation mix shows renewable penetration at 30.68% with grid carbon intensity at 0.609 tCO2/MWh, both improving from the 18-20% renewable share seen mid-afternoon as wind picks up into the evening peak.
Forecast data points to a materially firmer session ahead. AEMO's latest projections show prices easing to near-zero or negative overnight (trough around -$8.63/MWh at 04:30 AEST tomorrow) before a sharp escalation from 07:00 AEST, with forecast RRP jumping to $136.58/MWh by 08:00 and peaking near $151.38/MWh at 10:30 AEST tomorrow — consistent with the morning demand ramp compounding with reduced overnight wind potential (just 5.8% average wind potential forecast for 17 September versus 26.9% today). This suggests today's evening peak-price behaviour is a preview of a tighter demand-supply balance building into tomorrow's morning block, with prices staying elevated ($100-150/MWh) through the 08:00-14:00 window before easing into the afternoon.
On the demand-side and system notices: the Eraring-Newcastle 330kV line returned to service on 14 September, removing a transfer constraint that had been limiting NSW export capacity into the network. No new NSW-specific demand or network constraints are active today — the market notices are dominated by SA voltage-support directions and Tasmanian lightning-related contingency reclassifications, none of which materially affect NSW dispatch conditions. Traders should note the DOTQMSL forecast tightening into tomorrow's morning peak as the key signal for overnight positioning.