Commodity Demand — TAS1: Wednesday 17 June 2026

Tasmania's spot price sits at $25.89/MWh at 06:30 AEST with demand at 1,141.74 MW and rising — up from a daily trough of 900 MW recorded around 03:00 AEST. The price-demand relationship today has been sharply defined: during the morning peak, demand climbed to a session high of 1,345 MW (18:50 AEST) and prices pushed into the $85–$98/MWh range, while the midday demand trough around 930–940 MW coincided with near-zero spot prices between $0.10 and $0.22/MWh through the 01:00–04:30 AEST window. That near-zero pricing band extended for roughly six hours, reflecting surplus generation capacity relative to load — a characteristic Tasmania exhibits on low-demand winter days when hydro output at 888.2 MW and wind at 274.75 MW combine to well exceed minimum system requirements.

The demand trajectory from 06:00 AEST onward is tracking a clear evening ramp. From 1,053 MW at 06:00 AEST, demand has added approximately 90 MW in 30 minutes and the pattern is consistent with pre-evening residential and commercial heating load building in 10.7°C ambient conditions. The heating demand index sits at 7.3, with 98% cloud cover suppressing any solar contribution. The forecast is unambiguous: prices are set to escalate materially as demand climbs. The AEMO price forecast shows $27.20/MWh at 07:00 AEST (06:30 UTC), stepping to $54.90/MWh by 07:30 AEST, then consolidating in the $55–$69/MWh band through to 09:00 AEST before easing back under $30/MWh from 10:00 AEST onwards. A second near-zero price window is forecast from 00:00–04:00 AEST tomorrow ($0.18–$0.81/MWh), replicating today's midday pattern.

The price sensitivity to demand increments today is steep in the 1,200–1,345 MW range. Each ~50 MW increase above 1,250 MW has corresponded to a price step of $15–$25/MWh, with the intraday peak at 1,345 MW producing the session high of $97.85/MWh at 17:50 AEST. Below 1,000 MW, prices collapse toward zero, confirming a non-linear supply stack with limited thermal backing at current conditions — gas OCGT output registers zero. There are no TAS1-specific market notices active today; the YWPS4 non-conformance in VIC1 has no direct TAS1 price impact, though any constraint on T-V-MNSP1 flows could alter the Basslink arbitrage dynamic if Victorian prices diverge during tonight's demand ramp.

Demand-side managers and flexible load operators face a clear window: the near-zero price period forecast from 00:00 AEST tomorrow extends through to approximately 10:00 AEST, with prices forecast at $0.18–$29.29/MWh for most of that span. The morning ramp from 07:30 AEST tomorrow is forecast to push prices back to the $63–$66/MWh range, providing an estimated $38