Tasmania's electricity market experienced 100% renewable penetration during the evening of 25 May 2026, with generation supplied entirely by hydroelectric and wind resources totalling approximately 2,334 MW. Regional reference prices (RRP) ranged from $102.16/MWh to $106.12/MWh during the period, with prices peaking at 20:30 before moderating slightly.
The 100% renewable penetration was driven by strong hydroelectric output (approximately 2,893 MW across multiple generation units) combined with moderate wind generation (441 MW), eliminating the need for gas-fired OCGT generation. Price elevation above typical baseload levels, despite abundant renewable supply, was likely caused by binding network constraints (F_MAIN+RREG_0220 and F_T+RREG_0050) with marginal values ranging from $4.69–$7.71/MWh, indicating transmission limitations rather than fuel scarcity were constraining spot prices during this period.
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.