Regional Outlook — SA1: Saturday 30 May 2026
The SA1 spot price sits at $10.62/MWh as of 06:30 AEST, well below the day's trading range which peaked at $57.47/MWh during the morning ramp between 17:45 and 18:50 AEST. Overnight prices were largely at or below zero — touching as low as -$2.00/MWh across multiple intervals between midnight and 05:00 AEST — before demand climbed from a trough of around 1,101 MW to the current 1,325 MW as South Australia moves through a cool winter Sunday morning (13.6°C, 16% cloud cover). The 24-hour average price across the full history window is approximately $22–25/MWh, meaning the current interval represents a significant softening from the sustained $30–56/MWh band that prevailed through the 17:30–20:30 AEST period.
Wind is doing the bulk of generation work right now at 1,187.76 MW, with gas CCGT contributing 62.34 MW, battery dispatch at 1.71 MW, and gas OCGT at a negligible 0.11 MW. Solar output sits at zero, consistent with pre-dawn conditions. Total scheduled generation is approximately 1,252 MW against a demand of 1,325 MW, with the balance sourced from interconnector imports via Heywood and Murraylink. Renewable penetration sits at 95.01% and carbon intensity is 0.0245 tCO2/MWh — slightly elevated compared to the overnight low of 0.0097 tCO2/MWh recorded around 13:00 AEST when the grid ran at 98.03% renewables, but still reflecting a predominantly wind-driven dispatch profile. Weather forecasts show average wind potential easing to 3.2 today before lifting sharply to 26.0 on Monday, which will shape tomorrow's generation profile materially.
Predispatch forecasts for the next several half-hours point to a step-up in prices: the 07:00 AEST interval (21:00 UTC) is converging on approximately $10.67–$10.86/MWh across the most recent runs, but the 07:30 AEST interval is forecast at $13.72–$41.29/MWh with significant spread across runs — indicating uncertainty around the morning ramp as demand builds and wind output responds to the low wind potential day ahead (avg 3.2). The 08:00 AEST window forecasts cluster in the $37–$47/MWh range, and 08:30 AEST sits around $18–$43/MWh. Overnight intervals from 10:00 AEST onward are forecast well below $10/MWh, with several periods tipping negative as wind generation is expected to maintain high output against reduced overnight demand.
No market notices directly affecting SA1 operations are active today. The most proximate SA1-specific notice on file is a non-conformance for unit LGAPBS1 on 27 May (10 MW deviation, constraint NC-S_LGAPBS1) and a now-cancelled lightning-related contingency reclassification for the Penola West–South East 132 kV and Kincraig–Penola West 132 kV lines, resolved 25 May. The Heywood M1 500/275 kV transformer returned to