regional sa — SA1

$8.70/MWh at 16:30 AEST — SA1 is operating at the low end of its recent range, with demand at a modest 1,268 MW on this Saturday morning. The 24-hour price history tells a dramatic story: spot collapsed deep negative from roughly 18:00–03:00 AEST yesterday, hitting a floor of -$320/MWh during the solar-dominated midday window (13:35 AEST), before recovering through the evening transition. The current price represents a settled, wind-supported overnight floor — well below the morning peak corridor of $17–$30/MWh seen around 16:30–17:00 AEST yesterday when demand was pushing 1,500–1,580 MW.

Wind is carrying 764.95 MW — the sole dispatchable renewable contributing to the 804.95 MW total renewable generation alongside a minimal 40 MW gas CCGT baseload. OCGT and solar are both at 0 MW, consistent with pre-dawn conditions. Renewable penetration sits at 95.75% and carbon intensity is 0.0208 tCO2/MWh — among the cleanest readings in the 48-hour history, which ranged from a daytime high of 0.1888 tCO2/MWh (15:00 AEST yesterday, during grid stress as solar displaced dispatchable capacity) down to this current near-zero level. The carbon trajectory through yesterday shows intensity was highest during the wind-to-solar transition periods, not the solar peak itself — a pattern worth tracking as battery and interconnector scheduling lags renewable ramp rates.

Predispatch forecasts point to $18.20–$18.81/MWh for the next major forecast window, indicating a step-up is anticipated as morning demand builds and solar begins to suppress wind's margin advantage. The load window analysis reinforces this: overnight windows from 11:00–11:30 AEST are flagging prices as low as $0.01/MWh — deep discount territory for flexible industrial loads and battery charging. The 10:30–11:30 AEST window (UTC 00:30–01:30) is particularly attractive, with load window prices at or near $0.01/MWh and savings metrics of ~$18.80/MWh against reference. No active market notices are in place for SA1.

Grid stress is scored at 64/100 — elevated relative to the near-zero price environment, which points to the interconnector and inertia management burden SA typically carries during high-renewable, low-synchronous-generation periods. Price stability scores just 34/100, consistent with the wild negative-to-positive swings observed across the past 24 hours. Traders with flexible load or storage should be positioning to capture the next midday negative price window, which — with clear skies (0% cloud cover) and solar potential confirmed — is highly probable to repeat today from approximately 09:30–15:00 AEST.