The overnight session delivered brief negative pricing across VIC1 (−$2.67/MWh), SA1 (near zero), and QLD1 (−$1.73/MWh) as high wind and solar output met trough demand — all minor, short-lived events. Into Saturday, NEM regions tracked winter morning demand builds orderly: VIC1 was exporting 963 MW north into NSW1 at 81% of its interconnector capacity limit as of 06:30 AEST, with NSW1 averaging $62/MWh and QLD1 sitting at $72.50/MWh by late morning. Tasmania was the standout. Gas hub prices eased sharply overnight — Brisbane STTM fell from $7.96/GJ on 12 June to $6.40/GJ today; Adelaide dropped from $7.89/GJ to $6.10/GJ. Watch the VIC–NSW interconnector flow and any recurrence of the major Tasmanian network constraint through the day.
Tasmania is the headline of the past 24 hours. Between approximately 06:05–06:35 AEST, hydro (~650 MW) and wind (~372 MW) together supplied 100% of Tasmanian demand — a clean zero-intensity window. Separately, a major binding constraint T_BLINK_TV_NGZ carried a shadow price of $7,308,000/MWh during the early afternoon, though regional spot prices remained contained in the $47–$79/MWh band throughout the day (24h avg: $68/MWh, max: $79/MWh). A second NEM-wide constraint, F_T+NIL_MG_RECL_R6, reached a marginal value of $162,400/MWh before easing progressively across subsequent intervals. Both constraints are worth monitoring if similar network conditions arise this evening.
WA1 was far from quiet. The Wholesale Electricity Market recorded a price spike to $354.66/MWh at the 12:10 UTC interval — more than double the $171.97/MWh observed five minutes prior. The event was isolated to a single trading interval before prices stabilised. The 24-hour average nonetheless settled at $139/MWh, well above any NEM region, reflecting WA1's structurally different supply conditions and market design. No further spike intervals were flagged in the data available to