regional sa — SA1

The SA spot price sits at $161.88/MWh as of 16:30 AEST, a notable step up from the morning's range of $110–$138/MWh that dominated overnight and early trading. Demand is tracking at 1,515 MW, consistent with a typical Friday morning ramp. The pre-dawn period saw a sustained band of $138/MWh across multiple consecutive intervals — a signature of floor-price behaviour likely driven by gas-backed dispatch — before prices broke higher through the 15:00–16:30 AEST window, with several intervals above $150/MWh and a spike to $160.19/MWh at 16:20. The 24-hour trend is unambiguously elevated relative to the overnight trough, with the morning shoulder period adding upward pressure as solar generation remains absent.

The current generation mix is gas-heavy given the pre-solar window. Gas CCGT is contributing 324 MW and gas OCGT 173 MW, together accounting for roughly 72% of the 690 MW of tracked local generation. Wind is generating 193 MW — a relatively modest contribution given today's low wind potential reading of 0.2 — and solar sits at zero, consistent with the 16:30 AEST settlement time and 79% cloud cover. Renewable penetration on the latest carbon read stands at 44%, down sharply from the overnight peak above 92% when wind was carrying the bulk of load. Carbon intensity is at 0.3051 tCO2/MWh — elevated relative to the sub-0.05 tCO2/MWh readings seen in the early hours — reflecting the heavier gas dispatch share as morning demand builds and solar has yet to arrive.

Predispatch forecasts point to price relief through today. The most recent PASA runs target around $117/MWh for the 07:00 AEST interval, easing further into the $106–$110/MWh range by 07:30, with some runs showing values as low as $97–$98/MWh. This trajectory aligns with solar generation beginning to suppress net demand and displace gas peakers as the day progresses. The load window analysis reinforces this: the best near-term opportunities sit in the 07:30–08:00 AEST band, rated "good" quality with forecast savings of $49–$58/MWh against current prices. Flexibility operators and demand-response participants should note this window as the primary optimisation target for the morning session.

There are no active market notices for SA1 at this time. Grid stress scores at 68.8 and price stability at 55.7 reflect the current dispatch tension between low wind, absent solar, and sustained gas commitment — a condition that resolves materially once the solar fleet ramps post-08:00 AEST. Carbon intensity will follow suit, likely retreating below 0.15 tCO2/MWh by midday if cloud cover clears. Sustainability managers tracking Scope 2 emissions should weight procurement toward the midday window where renewable penetration historically peaks in SA.