Monthly market report
Sweden Stockholm SE3 — September 2025
Day-ahead auction, 726 settlement periods, computed from the same data the API serves.
Average price
47.54 €/MWh
+3.98 vs previous month
Negative prices
4 hours
4 settlement periods below 0
Avg daily spread
106.12 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
41.93 €/MWh
Extremes
- Cheapest period
- -1.81 €/MWh Sep 21, 14:00 UTC
- Priciest period
- 307.47 €/MWh Sep 8, 17:00 UTC
Top spike days
- 2025-09-08max 307.47 €/MWh
- 2025-09-09max 285.83 €/MWh
- 2025-09-30max 240.35 €/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 SE3
- → 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.