Zone explainer · recomputed continuously
What drives electricity prices in Ireland (SEM)?
Data window: trailing 30 days (mix) and 2026 year-to-date (prices) · recomputed 2026-08-28T02:39Z
136.63
YTD avg €/MWh
4
negative hours YTD
-10.04 / 407.26
YTD min / max €/MWh
volt-6sa
serving forecast model
The generation mix (trailing 30 days)
IE-SEM still prices off fossil fuel (61% of recent generation). Gas and coal set the marginal price most hours, which ties this zone to fuel and carbon markets more than to local weather. Renewable build-out shows up as spread widening: cheap green middays against fuel-priced peaks.
The zone has cleared negative 4 hours so far this year (live counters on the tracker), inside a year-to-date range of -10.04 to 407.26 €/MWh. Our serving model (volt-6sa) currently runs 31.2% less error than the naive baseline (live, 19 scored days) — verified daily on the public scorecard.
Method. Mix shares from realized generation (ENTSO-E A75, trailing 30 days); price stats from hourly means of published day-ahead auction results (2026 YTD). Every figure recomputes continuously — this page is a query, not an essay with a shelf life. Cite as "Voltcast Research, voltcast.com".
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