Tasmanian electricity prices declined to -$1.14/MWh during the 05:05 interval on 23 July 2026, with negative pricing sustained across 2 intervals. This followed a period of volatile pricing ranging from near-zero to $9.78/MWh in the preceding hours.
The negative pricing reflects oversupply conditions in TAS1 during early morning periods when demand was low. Generation remained substantial with combined hydro output exceeding 1,000 MW and wind generation around 520 MW, whilst binding constraints—including those with marginal values of $3.00/MWh and $2.68/MWh—constrained the region's ability to export excess generation, forcing prices negative to clear the local surplus.
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.