Tasmania's electricity grid achieved 100% renewable penetration during the morning of 24 April 2026, with hydro generation dominating at approximately 500–533 MW and wind contributing a further 18–25 MW. Spot prices remained relatively stable and moderate, ranging narrowly between $106.67/MWh and $107.31/MWh across the observed dispatch intervals. Gas OCGT generation was completely offline throughout the period, confirming full renewable dispatch.
Tasmania's high renewable outcome is largely structural, given the state's significant hydro storage capacity and wind resources, which routinely enable 100% renewable operation without fossil fuel backup. The stable and moderately priced dispatch suggests hydro generators were setting the marginal price, likely influenced by opportunity cost pricing tied to storage value and interconnector flows via Basslink rather than fuel cost pressures. The binding constraints — particularly the recurring F_T+RREG_0050 regulation raise constraint with a marginal value of around $4.46–$4.82 — indicate that FCAS regulation requirements in Tasmania were binding, reflecting a need for sufficient regulating capacity that may be limiting the dispatch flexibility of some generators.
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.