Tasmania achieved 100% renewable energy generation on 22 June 2026 between 20:00 and 20:30 AEST, with hydro and wind providing all 1,207–1,133 MW of supply. Regional reference prices increased modestly from $60.14/MWh to $70.20/MWh over this period, indicating tightening system conditions despite high renewable output.
The binding constraint F_MAIN+RREG_0220 with marginal values ranging from $4.95–$7.78/MWh and F_T+RREG_0050 with marginal values of $4.54/MWh were active throughout the period, collectively accounting for approximately $10–$12/MWh of the observed price increase. These constraints likely reflected transmission or regional service limitations that prevented full utilisation of available renewable capacity, forcing the market to rely on higher-cost marginal generation or to impose scarcity premiums as demand remained firm despite abundant wind and hydro 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.