Commodity Demand — TAS1: Tuesday 30 June 2026

Tasmania spot price sits at $25.12/MWh at 06:30 AEST, with demand at 1,123 MW and rising — up from a session low of around 917 MW during the mid-afternoon trough (17:30–18:00 AEST). The price-demand relationship across today's data is pronounced: when demand compressed to the 920–970 MW range through the afternoon, prices fell to $7.80–$9.80/MWh, reflecting ample supply headroom. As demand climbed back through the 1,000–1,120 MW range this evening, prices have recovered to $25/MWh, tracing a clear demand-led step-up. The generation mix at 06:25 AEST shows hydro at 953.67 MW and wind at 229.89 MW, with gas OCGT offline, consistent with supply comfortably covering current load at low marginal cost.

The overnight price history reveals significant volatility that demand levels alone do not fully explain. Between roughly 07:45–08:15 AEST overnight, prices spiked into the $79–$146/MWh range while demand held in the 1,125–1,270 MW band — narrower than the morning peak of 1,371 MW seen around 07:55 AEST overnight, which corresponded to a more stable $79.16–$79.25/MWh price band. This suggests dispatch-stack tightness and likely interconnector constraints were amplifying price at moderate demand levels, rather than demand itself being the primary driver of those spikes.

The forecast trajectory for today is a textbook winter weekday shape. Prices are forecast to lift to $49–$52/MWh through the 07:00–08:00 AEST window, then escalate sharply to $88.24/MWh across the 08:30–10:30 AEST morning peak — the period when demand is expected to rebuild toward the 1,300+ MW range consistent with overnight patterns. Prices are then forecast to collapse through the midday trough, reaching near-zero to slightly negative territory between 12:30 and 14:30 AEST (forecast $-0.05 to $-0.51/MWh), before recovering to the $9–$10/MWh range through the afternoon. At 8.7°C with 90% cloud cover and a heating demand index of 9.3, cold-weather residential and commercial load is the primary demand driver today, with solar potential at zero.

For demand-side participants, the negative price window forecast for 13:30–14:30 AEST (forecast $-0.51/MWh) and near-zero pricing across 12:30–14:00 AEST represent the clearest load-shifting opportunity of the day. The morning peak window — forecast at $88.24/MWh from 08:30 to 10:30 AEST — is the primary exposure period for inflexible load. No Tasmania-specific reserve or network notices are active; the SA LOR2 forecast for 03 July (minimum reserve 625 MW against a 758 MW requirement) does not directly constrain Tasmanian dispatch but warrants monitoring given Basslink's role in NEM-wide balancing.