Market analysis of 27 July 2025
South Australia recorded a wholesale electricity price high of AUD 164.78/MWh at 17:50 on 27 July 2025 and a low of −AUD 660.74/MWh at 16:30. The arithmetic average across its 288 five-minute observations was AUD 26.87/MWh.
Across the day, 62 observations were below zero, a total of 5.2 hours. The spread between the highest and lowest prices was AUD 825.52/MWh.
The Five-Minute Price Curve
The first chart shows each five-minute price for South Australia through the day, with times in fixed UTC+10. Timing matters for any operator: a battery or flexible load gains from the gap between the cheapest and dearest intervals, while a generator’s result depends on when its energy was delivered.
How The Five Regions Compared
Daily average prices in the other regions were: Tasmania AUD 76.01/MWh, New South Wales AUD 50.45/MWh, Queensland AUD 42.15/MWh, Victoria AUD 36.44/MWh. The second chart compares the five regional averages for 27 July 2025.
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 27 July 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.
