Regional Outlook — NSW1: Thursday 17 September 2026
NSW spot price sits at $113.94/MWh as of 06:30 AEST, down from an intraday peak of $189.08/MWh at 06:15 after demand pushed through 8,200 MW overnight. The price track over the past 24 hours has been volatile — negative pricing between $-9 and $-1/MWh dominated the 15:00-06:00 AEST overnight trough as demand fell below 4,600 MW, before the morning ramp drove prices back above $100/MWh from 06:40 as demand climbed past 8,900 MW into the 09:00 AEST peak.
Generation mix at the current interval is led by black coal at 5,354 MW, the dominant source against total scheduled generation of roughly 7,205 MW. Hydro contributes 843 MW, wind 477 MW, solar 274 MW, battery output 233 MW, and gas OCGT a marginal 24 MW, with gas CCGT offline. Renewable penetration sits at 25.35%, well down from the 50-56% range recorded through the overnight trough when wind and hydro covered a much larger share of a smaller demand base. Carbon intensity has risen in step, now at 0.6561 tCO2/MWh, up from a low of 0.38 tCO2/MWh around 23:30-00:00 AEST and tracking near the highs seen during yesterday's afternoon peak (0.75 tCO2/MWh).
Predispatch forecasts show prices easing through the morning, with 07:00 AEST at $65.54/MWh and 08:00 AEST at $88.86/MWh, before climbing again into the midday period — forecast to peak near $122.08/MWh at 12:30 AEST. Prices then soften through the afternoon and evening, with forecasts around $84/MWh from 16:00-17:30 AEST and easing further to $75.95/MWh by 18:00 AEST. Weather today supports moderate solar output (avg potential 38%) under partly cloudy skies (25% cloud cover) with light wind (1.2% potential), consistent with the moderate renewable contribution expected through the day.
No NSW-specific market notices are active. Ongoing AEMO intervention activity is concentrated in SA, relating to foreseeable voltage control events and directions to AGL SA Generation's Torrens Island unit, with a further intervention flagged for SA from 23:00 AEST tonight. A minimum system load (MSL1) condition is also forecast for SA on 19 September, unrelated to NSW system operation. Traders should note the five lowest-cost load-shifting windows all fall in the 01:00-06:00 AEST band, averaging $-5 to $-10/MWh, offering the largest arbitrage opportunity against today's peak pricing.