TAS1 experienced sustained negative pricing across 2 intervals on 11 July 2026 around 17:40–18:10, with prices reaching −$4.52/MWh at their lowest point. The region generated substantial renewable output from hydro (351–484 MW) and wind (292–384 MW) with no gas generation, creating an oversupply condition.
The negative pricing resulted from high renewable generation in TAS1 exceeding local demand, with hydro and wind collectively producing 636–876 MW across the observed intervals. Binding constraints F_TASCAP_RREG_0220 and F_T+RREG_0050 with marginal values of $3–5/MWh indicate that interconnector or network limitations restricted the region's ability to export surplus generation, forcing downward price pressure to incentivise load or generation curtailment.
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.