Market analysis of 18 December 2025
Regional demand in New South Wales peaked at 12,211.28 MW at 17:50 on 18 December 2025. The day’s lowest observation was 5,864.12 MW at 09:30, so demand moved by 6,347.16 MW from trough to peak.
At the demand peak the wholesale price was AUD 188.72/MWh. The day’s highest price, AUD 14,000.68/MWh, came at 18:05, and the daily price average was AUD 306.23/MWh.
The Demand Profile Through The Day
The first chart traces five-minute demand and dispatchable generation in New South Wales, in fixed UTC+10. The gap between the two lines reflects the region’s net interchange with its neighbours across the day.
How The Five Regions Compared
The second chart compares each region’s peak demand for 18 December 2025. New South Wales’s peak of 12,211 MW compares with Queensland 8,466 MW, Victoria 8,146 MW, South Australia 2,862 MW, Tasmania 1,143 MW.
What The Day Means For Operations
For a battery operator, the question is where charging and discharging belonged within this curve. For a generator or retailer, the same timestamps show which intervals carried the most value or cost. Reviewing the day interval by interval keeps these signals visible where a daily average would hide them.
This analysis uses Network Map’s regional observations dated 18 December 2025. Prices are in Australian dollars per megawatt-hour, times use fixed UTC+10, and daily averages give equal weight to each five-minute observation.
Explore The Data
Markets, Revenue Reconciliation, Battery Revenue Benchmarks.
