The NEM ran elevated across most regions overnight, with SA1 averaging $135/MWh and TAS1 posting the highest intraday spike at $449/MWh driven by a major Basslink-adjacent constraint. This morning at 06:30 AEST, prices remained firm: QLD1 at $144.50/MWh, VIC1 at $144.06/MWh, and SA1 at $170.44/MWh as the evening demand ramp was underway. QNI was binding at 583.74 MW of northbound flow into NSW1. Watch SA1 through the day — it saw intervals hit $257.83/MWh in the early morning window and has a history of sharp intraday swings today.
Tasmania was the standout region over the past 24 hours — for two very different reasons. Between approximately 20:05–20:40 UTC, TAS1 achieved 100% renewable penetration, with hydro (~3,093 MW) and wind (~275 MW) supplying all regional demand and prices holding in the $87–$88/MWh range. However, the same evening period was also shaped by a major binding constraint — T_BLINK_TV_NGZ — which reached an exceptional shadow price of $7.308 million, pointing to severe network congestion between Basslink and the northern grid. A related VIC1-side constraint (V_T_NIL_BL1, shadow price $245/MWh) activated overnight, briefly pushing VIC1 prices to $130.68/MWh. TAS1's 24-hour average settled at $109/MWh with a max of $449/MWh.
WA1 was relatively orderly over the past 24 hours, averaging $109/MWh with a maximum of $193/MWh — the most contained intraday range of any region in the data set. No significant constraint or event