Commodity Demand — VIC1: Monday 18 May 2026

Victoria's spot price sits at $83.44/MWh at 06:30 AEST with demand at 5,509 MW — a marked contrast to the overnight session where demand peaked near 6,230 MW and prices consistently traded in the $230–$300/MWh range from around 22:00 to 05:00 AEST. That overnight period illustrates clear price sensitivity to demand levels: every move above 6,000 MW pushed prices above $220/MWh, with the $277–$300/MWh ceiling repeatedly tested as demand held in the 5,900–6,200 MW band through the small hours. The sharp price drop since approximately 05:00 AEST tracks the typical morning demand trough driven by the residential and commercial overnight thermal load unwinding ahead of solar contribution, though solar is currently zero with 100% cloud cover and temperatures at 11.6°C generating a heating demand index of 6.4.

Today's demand trajectory follows the classic winter weekday shape. Demand troughs in the 4,335–4,570 MW range during the 03:00–07:00 AEST window — the solar minimum period — with prices floored near $73–$97/MWh. The morning ramp builds demand toward a peak near 07:00–09:00 AEST (the data shows a prior-cycle peak of 7,111 MW at 19:00 AEST equivalent), and current demand is climbing again as the post-midnight residential load builds. Forecast RRP for 07:00 AEST (21:00 UTC) sits at $97/MWh across multiple forecast runs, suggesting the market is not pricing in any significant stress at that horizon. The 07:30 AEST (21:30 UTC) forecast range is slightly wider at $109–$167/MWh across earlier runs, converging to around $110–$112/MWh in the most recent iterations — consistent with the morning ramp attracting some dispatchable capacity premium.

The key demand-side risk for today is the evening peak, typically 18:00–21:00 AEST in winter, where demand in yesterday's cycle reached 6,200+ MW and prices exceeded $250/MWh. With a maximum temperature of only 15.4°C forecast and 61% average cloud cover, heating demand will sustain elevated consumption throughout the day. Wind potential is rated at 2.2 on a 0–5 scale with 907 MW of wind currently dispatched, and without solar contribution during daylight hours until cloud breaks, the generation mix remains brown coal at 3,822 MW, gas OCGT at 412 MW, and wind at 907 MW — with renewables at 18.1%. A repeat of sub-$100/MWh pricing in the midday trough is likely, but the evening demand build toward 6,000+ MW sets up renewed upward price pressure post-17:00 AEST if wind output does not increase materially. Load window data shows deep off-peak pricing of $8.95–$20/MWh available in the 12:00–15:30 AEST window (UTC 02:00–05:30), flagging that as the optimal consumption window for flexible demand today.