Tasmania achieved 100% renewable generation during the 20:05–20:30 period on 5 June 2026, with hydroelectric and wind sources supplying approximately 1,120–1,200 MW combined output and no thermal generation dispatched. Regional reference prices remained flat at $80.20/MWh across all six settlement intervals, indicating stable market conditions despite full renewable penetration.
The sustained 100% renewable penetration reflects abundant hydroelectric capacity (837–886 MW) supplemented by consistent wind generation (234–246 MW), reducing reliance on dispatchable thermal plant. Price stability at $80.20/MWh suggests that multiple binding constraints with modest marginal values ($3.73–$4.98) were active simultaneously, indicating that transmission or network constraints rather than energy scarcity were setting prices, which is consistent with high renewable availability limiting competition from higher-cost thermal units.
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.