Tasmania (TAS1) experienced 100% renewable energy penetration between 20:05 and 20:35 on 11 June 2026, with hydro generation supplying approximately 888 MW and wind contributing 162–190 MW. Regional reference prices remained stable in the $77.95–$78.00/MWh range for most of the period, with a slight spike to $82.49/MWh in the final interval.
The high renewable penetration reflects strong hydro output and moderate wind generation, with no gas-fired generation required. The binding constraint (F_T+RREG_0050) with marginal values of $4.34–$5.65/MWh indicates a binding network or regulation constraint that contributed modestly to pricing. The stable, relatively low prices across most intervals reflect the abundant renewable supply, whilst the marginal constraint binding maintained floor pressure on the regional reference price.
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.