Tasmania (TAS1) experienced 100% renewable energy penetration on 17 September 2026 between 07:05 and 07:30 AEST, with generation comprising hydroelectric (2,226.94 MW), wind (755.19 MW), and rooftop solar (61.18 MW) resources. Regional Reference Prices rose from $45.16/MWh to $108.29/MWh across the settlement interval, with multiple binding constraints active throughout the period.
The price rise appears driven by binding network constraints rather than fuel scarcity, evidenced by the persistent absence of gas-fired generation despite rising prices and the presence of multiple active constraints with marginal values between $3.70 and $24.71/MWh that collectively added upward pressure to dispatch costs. The constraint F_T+NIL_ML_L6 carried the highest marginal value at $24.71/MWh, suggesting transmission or network limitations were the primary economic binding factor constraining the dispatch of available renewable capacity during this period of abundant renewable supply.
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.