SA1 experienced a moderate price spike reaching $500.44/MWh during the 12:35 UTC interval on 23 June 2026, with elevated pricing persisting across two settlement periods. The spike was preceded by volatile pricing swings in the preceding 30 minutes, including a sharp dip to $169.10/MWh at 12:30 UTC followed by the return to the $500 level.
The binding constraint T_BLINK_TV_NGZ exhibited an exceptionally high marginal value of $7.308 million, indicating severe supply scarcity or transmission limitation driving the elevated regional price floor. The generation mix was heavily reliant on dispatchable gas capacity (1,587 MW combined OCGT and CCGT generation across snapshots), with minimal renewable contribution (82 MW wind, zero solar), limiting flexible supply options to respond to the binding constraint activation and supporting sustained elevated pricing.
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.