Prices lifted across all six regions through the Friday evening and Saturday morning periods. Victoria led the NEM with a 24-hour average of $108/MWh and a peak of $175/MWh, while South Australia averaged $124/MWh — the tightest supply picture on the NEM proper. QNI (NSW–QLD interconnector) sat fully saturated at its import limit of –289 MW through the morning, constraining northward flow and locking regional pricing dynamics. Victoria's spot reached $157/MWh by 06:30 AEST as morning demand ramped from its overnight trough. Gas hub prices eased day-on-day: Sydney STTM fell to $8.55/GJ from $9.01/GJ on Friday; Brisbane fell to $8.31/GJ from $9.00/GJ. Watch the QNI constraint and SA pricing through the afternoon shoulder period.
Tasmania is the standout region today. Between 17:35 and 18:00, TAS1 achieved 100% renewable generation (hydro and wind), with spot prices holding at a moderate $88–$97/MWh during that window. Running concurrently, the T_BLINK_TV_NGZ constraint on the Blinking Billy to Table Valley transmission circuit recorded a shadow price of $7.308 million — an exceptionally high figure indicating severe transmission congestion. Despite the binding limit, wholesale prices did not fully spike, suggesting dispatch economics absorbed much of the impact. A separate interval at 10:50 saw the spot reach $115.16/MWh as the same constraint bit again. The 24-hour average settled at $100/MWh, with a daily peak of $145/MWh.
The WEM was the highest-priced market over the past 24 hours. WA1 averaged $157/MWh against a daily peak of $263/MWh. The peak was an isolated event: at 20:10, the RRP jumped to $263.34/MWh — a 65% increase from the prior interval's $