Tasmania achieved 100% renewable electricity generation during the evening of 4 June 2026, with hydro and wind resources supplying approximately 3,438 MW of generation across six settlement intervals. Regional reference prices remained steady at $80.18/MWh throughout the period, indicating a stable market outcome despite the high renewable penetration.
The sustained high renewable generation reflects Tasmania's natural resource endowment, with hydro generation ranging from 921–1,061 MW and wind generation from 210–234 MW during evening hours. The consistent pricing and multiple binding constraints—including constraint F_MAIN+RREG_0220 (marginal value $5.54/MWh) and repeated binding of constraint F_T+RREG_0050 (marginal value $3.89/MWh)—suggest that network or operational constraints, rather than generation scarcity, were active in managing system balancing 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.