Monthly market report
Great Britain GB — August 2025
Day-ahead auction, 1,488 settlement periods, computed from the same data the API serves.
Average price
71.37 €/MWh
-8.07 vs previous month
Negative prices
32 hours
64 settlement periods below 0
Avg daily spread
66.04 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
29.63 €/MWh
Extremes
- Cheapest period
- -12.88 €/MWh Aug 9, 13:30 UTC
- Priciest period
- 154.67 €/MWh Aug 11, 18:00 UTC
Top spike days
- 2025-08-11max 154.67 €/MWh
- 2025-08-26max 145.52 €/MWh
- 2025-08-12max 129.27 €/MWh
Work with this data
- → Full 15-minute history via API (2015 onwards)
- → Battery arbitrage backtest against this month's prices
- → Live forecast accuracy for GB
- → Embed the live price chart on your site — free
Data source: ENTSO-E Transparency Platform (transparency.entsoe.eu). Data source: SMARD.de, Bundesnetzagentur | CC BY 4.0. Derived statistics are Voltcast own-IP output.