Regional Outlook — SA1: Saturday 23 May 2026

The spot price in South Australia sits at $64.79/MWh as of 06:30 AEST, with total demand at 1,249 MW — a Sunday-low figure consistent with the overnight trajectory. The current price is materially above the overnight trough (sub-$5/MWh prints were seen around 12:55–13:25 AEST yesterday) but well below the morning peak, which breached $113/MWh briefly at 07:55 AEST. The 24-hour price history shows a textbook weekday-style morning ramp — prices climbed from ~$20–35/MWh in the early hours to a sustained $85–105/MWh band through the 06:00–09:00 AEST window — before easing through the afternoon and evening to settle in the $60–65/MWh range where they now sit.

The generation mix is wind-dominated at this hour. Wind is contributing 1,146 MW, gas OCGT 63 MW, gas CCGT 40 MW, and battery storage a nominal 0.14 MW, with solar at zero given the pre-dawn timing. Renewable penetration sits at 91.73% and carbon intensity is 0.0487 tCO2/MWh — both figures reflect the night-time wind-heavy profile. Carbon intensity reached its daily high around 07:30–09:00 AEST (0.207 tCO2/MWh, renewable penetration ~67%) when gas capacity was carrying a larger share of the morning demand ramp. Since the early afternoon, intensity has tracked steadily lower as wind maintained strong output against declining demand. Today's weather outlook — 100% cloud cover, 14°C, wind potential rated 4.1 — confirms solar will contribute nothing to the daytime mix and wind should remain the dominant source through the day.

The most significant active notice is a Market Intervention — Direction issued at 04:16 AEST today (24 May 2026) for the SA region, commencing from the interval ending 04:05 AEST. AEMO has directed a participant under s.116 of the National Electricity Law, triggering an intervention event from that interval. Intervention pricing does not apply. This direction has not yet been cancelled — traders should note that intervention trading intervals are in effect for SA from 04:05 AEST this morning until a further cancellation notice is published. The direction is consistent with a pattern of SA voltage-related interventions visible in recent market notices (14 May and 15 May also saw SA directions for voltage control), which typically occur when synchronous unit commitment is insufficient to maintain voltage stability despite adequate MW supply from non-synchronous sources.

Predispatch forecasts for the next two hours point to prices easing from current levels. The 07:00 AEST half-hour (21:00 UTC) is forecast at approximately $65/MWh in the most recent predispatch runs, with the 07:30 AEST half-hour forecast ranging $64–75/MWh across recent intervals. The 08:00 AEST window shows a wider spread ($35–75/MWh) in earlier forecast vintages, suggesting some uncertainty around whether the morning demand ramp materialises similarly to Saturday. Given 100% cloud cover suppressing any solar contribution and wind potential remaining moderate, gas capacity will again be required to firm the grid through the morning peak — watch the 06:30–09:00 AEST window for price pressure if wind