Commodity Demand — SA1: Saturday 23 May 2026

64.79 $/MWh is the current spot price in South Australia at 06:30 AEST, with total demand sitting at 1,249 MW — a notably subdued level for this time of a winter Sunday morning. That 1,249 MW figure is well below the morning peak of 1,632 MW reached earlier around 18:25–18:30 AEST (08:25–08:30 UTC), and the price-demand relationship today has been tightly coupled: the climb from sub-20 $/MWh overnight lows through to the 100–113 $/MWh range coincided precisely with demand rising from a trough near 895 MW (around 14:15 AEST) through to that 1,630+ MW morning peak. As demand has since unwound through the afternoon and into early evening, prices have tracked it down in near-lockstep, settling into a 55–65 $/MWh band as demand stabilises in the 1,200–1,260 MW range.

The generation mix at 06:25 AEST shows wind at 1,146 MW, gas OCGT at 63 MW, and gas CCGT at 40 MW, with battery contributing a negligible 0.14 MW and solar at zero given the overnight period. Carbon intensity is 0.0487 tCO2/MWh with renewables at 91.7%. The overnight and afternoon periods — when demand dipped below 1,000 MW — saw prices touch single digits and low teens (4.71–10.98 $/MWh), reflecting wind generation comfortably covering load with minimal thermal dispatch required. The early-morning pre-dawn ramp from roughly 13:30–17:00 AEST, when demand surged from 895 MW to 1,632 MW in under four hours, is where the price sensitivity was sharpest: prices moved from sub-20 $/MWh to above 100 $/MWh as thermal plant was called progressively deeper.

The critical market notice for today is an active AEMO direction issued to a participant in SA at 04:16 AEST, effective from the interval ending 14:05 AEST today (24 May). This is a voltage-driven intervention event — not an energy adequacy issue — and intervention pricing does not apply, meaning market-clearing prices remain undistorted. However, the direction places a synchronous unit under AEMO control, which has supply-stack implications for the upcoming morning demand ramp. The forecast data for intervals from 07:00 AEST onward (21:00 UTC) points to prices easing into the 30–70 $/MWh range as tonight's off-peak demand trajectory takes hold, with the most recent forecasts for the 07:00 AEST interval converging around 65 $/MWh — broadly consistent with the current spot. Overnight intervals from 09:30–10:00 AEST are forecast in the 20–40 $/MWh range, reflecting the expected demand trough as the Sunday night load profile bottoms out near 900–1,000 MW based on the equivalent period observed over the past 24 hours.

Today's demand outlook is shaped by two factors: first, a 100% overcast sky with zero solar potential and a max temperature of 15°C sustains moderate heating demand throughout the day, supporting a relatively flat demand floor compared to warmer months — expect the daily minimum to hold