NEM-wide averages held in the $93–$117/MWh range overnight, with SA1 the priciest region at an average of $117/MWh and a peak of $199/MWh. VIC1 touched $190/MWh intraday before easing, while QLD1 swung from a low of ~$35/MWh in the mid-morning solar window to $130.90/MWh by 06:30 AEST as the evening demand ramp took hold. VIC–NSW interconnection (QNI) was running 813 MW northbound against a limit of ~1,343 MW at that snapshot. Watch the SA–VIC spread and QLD ramp continuation through the Tuesday peak period; gas hub prices have ticked up day-on-day across all STTM hubs.
TAS1 is today's standout. During the early evening Tasmania achieved 100% renewable penetration, supplied entirely by hydro (~285 MW average) and wind (~238 MW average), with spot prices sitting around $88/MWh and a brief spike to $105.50/MWh at 17:30. More notable for system operators: the internal network constraint T_BLINK_TV_NGZ registered a shadow price of $7,308,000 — an extraordinary marginal value — while the regional reference price remained in the modest $88–$97/MWh range. The divergence indicates the constraint is binding on intra-regional or inter-regional network flows rather than directly driving spot price. Worth monitoring for any escalation into Wednesday.
WA1 averaged $119/MWh across the past 24 hours with a notably tight range — the daily maximum reached only $122/MWh, just $3 above the average. That price stability is atypical relative to the volatility seen across NEM regions overnight and suggests a well-balanced supply position in the Wholesale Electricity Market today. No significant constraint or dispatch events have been flagged for WA1 in the available data.
Reserves: