Monthly market report
Sweden Luleå SE1 — September 2025
Day-ahead auction, 726 settlement periods, computed from the same data the API serves.
Average price
15.69 €/MWh
-5.62 vs previous month
Negative prices
3 hours
3 settlement periods below 0
Avg daily spread
39.62 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
25.23 €/MWh
Extremes
- Cheapest period
- -0.85 €/MWh Sep 21, 11:00 UTC
- Priciest period
- 231.11 €/MWh Sep 8, 18:00 UTC
Top spike days
- 2025-09-08max 231.11 €/MWh
- 2025-09-09max 227.56 €/MWh
- 2025-09-18max 90.87 €/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 SE1
- → 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.