The NEM's overnight session was defined by a sharp price wedge, with Victoria printing a 24-hour average of just $33/MWh — including a sustained sub-zero and near-zero run through the mid-afternoon — while Tasmania averaged $86/MWh and NSW averaged $64/MWh. Three interconnectors were binding simultaneously as at the morning period, with the Victoria-to-mainland spread being actively arbitraged at network limits. By 06:30 AEST, Queensland had climbed to $84.73/MWh on 6,515 MW demand, up 17.9% in price on a demand lift of only 286 MW over one hour — watch QLD sensitivity through the morning ramp. SA eased to $22.25/MWh after a pre-dawn run of $80–$135/MWh. Interconnector congestion on the South East to Tailem Bend corridor bears watching into today's dispatch window.
Tasmania achieved 100% renewable penetration during the 07:10–07:30 AEST window, with hydro supplying approximately 644–657 MW and wind contributing 16–26 MW, and no gas online. Spot prices held at $88–$96/MWh — stable rather than stressed, consistent with a minor event. Separately, binding network constraint F_S+SETB_L1 recorded a peak shadow price of $990/MWh on the SA transmission network, with concurrent binding of related constraints F_S++SETB_L60 and frequency regulation constraint F_T+RREG_0050, pointing to a period of sustained but easing congestion pressure in the South East to Tailem Bend corridor. SA's 24-hour max reached $107/MWh.
WA1 recorded a 24-hour average of $96/MWh with a narrow max of