Tasmania achieved 100% renewable generation during the 06:35–07:05 UTC settlement period on 31 August 2026, with hydro and wind sources totalling approximately 2,669 MW across multiple dispatch intervals. Prices rose sharply from $50.22/MWh to a peak of $100.10/MWh at 06:50 UTC before moderating to $82.74/MWh by 07:05 UTC.
The price escalation despite high renewable penetration reflects binding constraints limiting export or transmission capacity rather than generation scarcity. Multiple binding constraints with non-negligible marginal values (F_MAIN+RREG_0220 at $7.81/MWh, F_TASCAP_RREG_0220 at $5.98–$4.97/MWh, and F_T+RREG_0050 at $4.38/MWh) collectively account for the observed price elevation, indicating that abundant renewable output was constrained by interconnection or network limitations during peak demand intervals.
Causal analysis generated by gridIQ's synthesis model from live AEMO market data: dispatch prices, generation mix, interconnector flows and market notices in the interval surrounding the event.