Market analysis of 27 August 2025
South Australia recorded a wholesale electricity price high of AUD 120.16/MWh at 20:05 on 27 August 2025 and a low of −AUD 102.00/MWh at 11:40. The arithmetic average across its 288 five-minute observations was −AUD 0.82/MWh.
Across the day, 199 observations were below zero, a total of 16.6 hours. The spread between the highest and lowest prices was AUD 222.16/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 62.22/MWh, New South Wales AUD 57.94/MWh, Queensland AUD 45.82/MWh, Victoria AUD 24.33/MWh. The second chart compares the five regional averages for 27 August 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 August 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.
