Tasmania achieved 100% renewable electricity generation during the early hours of 1 April 2026, driven entirely by hydro and wind resources with no gas generation online. Spot prices remained relatively stable and moderate, ranging between approximately $70 and $77/MWh across the observed dispatch intervals. This outcome reflects Tasmania's structural advantage as a predominantly hydro-based system with meaningful wind capacity.
Tasmania's 100% renewable penetration is consistent with its unique generation portfolio, where large hydro assets (operating at approximately 380–390 MW combined) provide dispatchable baseload and firming capacity, supplemented by around 125–132 MW of wind generation. The low-demand overnight period reduced the need for any gas peaking plant, allowing renewables to meet all local load requirements. The binding constraint F_MAIN++RREG_0220, related to raise regulation frequency control ancillary services (FCAS) on the Basslink interconnector corridor, reflects the challenge of maintaining system strength and frequency stability in a system with high inverter-based and hydro generation, which is a known operational consideration for the Tasmanian islanded network.
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.