Commodity Demand — TAS1: Wednesday 12 August 2026
Tasmania's spot price sits at $58.37/MWh at 06:25 AEST with demand at 1,134 MW, climbing out of the overnight trough. The region has already tracked a wide overnight range — demand bottomed near 1,013 MW around 03:00-05:00 AEST, coinciding with prices flirting with negative territory (-$6.62/MWh at 04:45), before the morning ramp pushed demand back above 1,300 MW by 08:00, driving prices as high as $95.40/MWh at 07:00 and a cluster in the $80-92/MWh band through the 08:00-09:30 window.
The demand-price relationship today is tight and predictable: every 100-150 MW step up in load is adding roughly $20-40/MWh to spot price, consistent with a steep-ish supply curve once hydro dispatch and the single 123 MW gas OCGT unit are fully committed. Current generation mix shows hydro carrying 766 MW, wind at 479 MW and gas OCGT at 123 MW — with wind contributing solidly given today's forecast wind potential is modest (2.7 average), so this morning's wind output is likely to taper as the day progresses, adding upward pressure on prices during any afternoon demand secondary peak.
AEMO's forecast trajectory points to a sharp escalation ahead: forecast RRP holds in the $75-104/MWh range through the 07:00-08:00 AEST window, then spikes hard to $125-159/MWh across 08:30-11:00 AEST, before easing back to $85-97/MWh into midday and settling in the $50-75/MWh band through the afternoon and evening. This morning peak is the key risk window for traders — the combination of rising demand (likely tracking toward 1,300+ MW again) and thinner renewable buffer (cloud cover at 100% today capping any solar contribution, wind potential low) points to tight conditions supporting those forecast highs. Grid stress score sits at 58.5 and price stability at just 40.1, reflecting this volatility. No new demand-side constraints from notices — historical TAS1 lightning-related contingency reclassifications have all been cancelled, and no active load-shedding or intervention notices apply to today's outlook. Renewable penetration currently reads 90.98% with carbon intensity at 0.0586 tCO2/MWh, giving traders a low-emissions backdrop even as price volatility remains the dominant theme for today's session.