Tasmania achieved 100% renewable energy penetration on 30 May 2026 between 20:05 and 20:30, with hydroelectric and wind generation combining to meet all demand whilst gas-fired generation remained offline. Regional Reference Prices (RRPs) remained stable at approximately $80/MWh during this period, with a minor increase to $81.76/MWh in the final two intervals.
The 100% renewable generation was driven by strong combined hydro output (approximately 400–580 MW) and consistent wind generation (370–420 MW), which together satisfied TAS1 demand without requiring dispatchable thermal generation. The binding constraint F_T+RREG_0050 (likely a Tasmanian transmission or regional security constraint) maintained a marginal value of $5.43–5.44/MWh, indicating the constraint was actively managing system security rather than price-setting, thereby allowing renewable generation to suppress spot prices and eliminate the need for expensive thermal dispatch.
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.