Tasmania achieved 100% renewable electricity generation during the evening of 29 June 2026, with hydroelectric output of approximately 890–988 MW and wind generation of 128–155 MW meeting all demand. Regional reference prices remained stable and low at around AUD 25.17–25.18/MWh across the five-minute settlements.
The sustained low prices reflect abundant renewable supply with zero fossil fuel generation required. Binding constraints F_MAIN+RREG_0220 and F_T+RREG_0050 carried modest marginal values (ranging from AUD 4.54 to 5.64/MWh), indicating that network or system strength constraints were active but did not materially elevate dispatch costs, consistent with the low observed regional reference prices.
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.