Victoria experienced sustained negative pricing in the early morning of 2 August 2026, with the region settlement price reaching -$15.42/MWh at 06:05 and averaging around -$12/MWh across a multi-interval trough before gradually recovering. The negative pricing persisted across approximately 8 consecutive 5-minute intervals during a period of high renewable generation, particularly from wind (4,037 MW combined) and solar (567 MW).
The negative pricing reflects an oversupply condition typical of low-demand early-morning periods coinciding with elevated wind and solar generation, which generators cannot readily curtail. Multiple binding constraints with modest marginal values (ranging from $3–$3.93/MWh) indicate transmission or operational limitations were preventing efficient energy export or load balancing across the broader NEM, forcing the region to accept negative prices to clear surplus generation rather than incur constraint violation costs.
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.