Monthly market report
Ireland (SEM) IE-SEM — May 2026
Day-ahead auction, 720 settlement periods, computed from the same data the API serves.
Average price
143.8 €/MWh
+25.07 vs previous month
Negative prices
0 hours
0 settlement periods below 0
Avg daily spread
79.33 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
35.46 €/MWh
Extremes
- Cheapest period
- 78.15 €/MWh May 23, 13:00 UTC
- Priciest period
- 265.73 €/MWh May 1, 07:00 UTC
Top spike days
- 2026-05-01max 265.73 €/MWh
- 2026-05-06max 245.25 €/MWh
- 2026-05-02max 242.5 €/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.