Monthly market report
Ireland (SEM) IE-SEM — May 2025
Day-ahead auction, 744 settlement periods, computed from the same data the API serves.
Average price
108.44 €/MWh
-2.73 vs previous month
Negative prices
16 hours
16 settlement periods below 0
Avg daily spread
89.94 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
41.14 €/MWh
Extremes
- Cheapest period
- -23.5 €/MWh May 25, 10:00 UTC
- Priciest period
- 237.39 €/MWh May 27, 08:00 UTC
Top spike days
- 2025-05-27max 237.39 €/MWh
- 2025-05-01max 233.21 €/MWh
- 2025-05-06max 218 €/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 IE-SEM
- → 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.