NSW1 experienced sustained negative pricing across three intervals on 24 August 2026 at 05:35–05:45, with prices declining to a minimum of −$6.62/MWh. The event occurred during early morning low-demand conditions with very high solar generation (2,691 MW) and substantial wind generation (524 MW) overwhelming system requirements.
The negative pricing reflects excess renewable generation relative to constrained demand during a low-consumption period. Multiple binding constraints with significant marginal values—including F_T+RREG_0050 ($31.81/MWh) and F_T+NIL_MG_R60 ($29.13/MWh)—restricted the system's ability to export or redistribute surplus generation, forcing prices negative to incentivise 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.