Tasmania's electricity grid achieved 100% renewable penetration during the early morning period of 6 April 2026, driven entirely by hydro and wind generation with no gas peaking capacity dispatched. Generation was dominated by hydro output ranging between approximately 341–361 MW, supplemented by wind contributing around 103–121 MW across the observed intervals. Spot prices remained relatively stable and moderate, ranging from $69.16/MWh to $82.44/MWh, reflecting a balanced supply-demand position.
Tasmania's 100% renewable outcome is characteristic of its hydro-dominated generation fleet, which provides a reliable and dispatchable renewable baseload capable of meeting regional demand without fossil fuel support, particularly during low-demand overnight periods. The presence of favourable wind conditions provided additional renewable output, reducing the hydro dispatch burden and supporting full renewable coverage. Binding frequency and regulation constraints (F_T+RREG_0050, F_TASCAP_LREG_0210, F_I+RREG_0220) with modest marginal values suggest that Basslink interconnector flows and FCAS regulation requirements were adding some upward price pressure, likely reflecting the cost of maintaining system security services in an all-renewable dispatch environment.
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.