Overnight was broadly orderly — brief negative pricing in NSW1 (–$9/MWh, two intervals at ~03:10 AEST) and QLD1 (–$2/MWh) reflected soft early-morning demand, while WA1 posted a single-interval spike to $251/MWh at 04:35 UTC. The story has shifted sharply heading into this evening: demand is accelerating across every mainland NEM region simultaneously. NSW1 demand jumped ~586 MW in 25 minutes to 8,230 MW by 06:25 AEST, with the spot price at $140/MWh; VIC1 demand climbed ~360 MW in 30 minutes to 5,773 MW at $129/MWh; SA1 and QLD1 are similarly elevated. Watch the evening ramp closely — QNI is already binding hard at –544 MW on its import limit with an $11.83/MWh NSW–QLD spread.
Tasmania is the standout region today on two counts. First, TAS1 achieved 100% renewable penetration during the evening peak, with hydro and wind entirely meeting regional demand — the lowest grid intensity on the NEM at 0.00 tCO₂/MWh. Second, a major binding constraint on Basslink (T_BLINK_TV_NGZ) activated around midday with an exceptional shadow price of $7.308 million/MWh, signalling the interconnector was at capacity and severely limiting power transfer with Victoria. Despite the renewable penetration milestone, TAS1 spot prices rose to $112/MWh by 06:30 AEST — a 24-hour max of $242/MWh — illustrating how interconnector constraints can decouple regional prices from generation mix. A separate high-value constraint on the Quorn–Playford path in SA (C_N_QUORNP_009_L_H, $7.308M shadow price) also bound during the day, pointing to transmission pressure across the southern NEM more broadly.
WA1 was the highest-average-price region across all six markets today at $125/MWh, with a single-interval spike to $251/MWh at 04:35 UTC — classified as a moderate severity event. Surrounding intervals fluctuated between $100 and $251/MWh, suggesting a local