Victoria (VIC1) experienced sustained negative pricing at -$4.4/MWh and -$1.16/MWh across two consecutive intervals on 1 August 2026 at 01:00 and 01:05. This followed a sharp price collapse from $10.50/MWh to near-zero levels, indicating significant oversupply in the region during the overnight period.
The negative pricing was driven by high renewable generation, particularly 1,190 MW of solar output and 1,070 MW of combined wind generation, which exceeded regional demand during off-peak hours. Multiple binding constraints with marginal values between $3.43/MWh and $4.67/MWh indicate network limitations that prevented efficient export of excess generation, forcing the market into negative prices to compel load acceptance and discourage further supply.
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.