Tasmania achieved 100% renewable energy penetration during the 20:05–20:30 period on 16 June 2026, with hydro generation (approximately 890–920 MW) and wind (143–148 MW) meeting all demand. Regional reference prices rose from $51.51/MWh to $59.00/MWh over the six settlement intervals.
The rising price trajectory despite 100% renewable generation indicates that system constraints, rather than fuel scarcity or generation adequacy, drove pricing. Multiple binding constraints with non-negligible marginal values—particularly F_T+LREG_0050 (ranging from 6.18 to 26.14 $/MWh)—suggest transmission or reserve requirement limits were active, restricting the economic dispatch of available renewable capacity and compressing available supply in the dispatch stack. The absence of gas-fired generation despite rising prices and the sustained high renewable output indicate that constraints limited economic dispatch rather than generation availability.
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.