SA1 experienced sustained negative pricing at −$3/MWh across two consecutive intervals (13:15–13:20 on 11 June 2026), representing a minor pricing event. Prices recovered sharply to $60.08/MWh in the preceding interval and subsequently fell to $9.10/MWh, indicating rapid and volatile market swings.
The negative pricing was driven by high renewable generation, particularly 1218.96 MW of wind output combined with 112.32 MW of battery generation, creating local oversupply that could not be efficiently exported or absorbed. Binding constraints with marginal values of $7.08 and $4.32 indicate that transmission limitations prevented equilibration of supply and demand across regions, forcing the market into a state where renewable generators were required to reduce output or absorb negative pricing to clear the market.
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.