Ireland and Northern Ireland (SEM) Negative Electricity Prices, 2026
Day-ahead electricity prices in Ireland and Northern Ireland (SEM) were below zero for 4 hours (0.06% of hours) on 1 day in 2026 up to 2026-09-19 (19 September 2026). The lowest interval price was EUR -10.05/MWh on 2026-04-11 (11 April 2026) and the highest EUR 407.27/MWh on 2026-06-24 (24 June 2026). Prices are day-ahead, in EUR per MWh as published, and are not converted.
Key Facts
- Day-ahead electricity prices in Ireland and Northern Ireland (SEM) were below zero for 4 hours (0.06% of hours) on 1 day in 2026 up to 2026-09-19 (19 September 2026). The lowest interval price was EUR -10.05/MWh on 2026-04-11 (11 April 2026) and the highest EUR 407.27/MWh on 2026-06-24 (24 June 2026).
- The longest streak of consecutive days with a price below zero in Ireland and Northern Ireland (SEM) in 2026 was 1 day, from 2026-04-11 (11 April 2026) to 2026-04-11 (11 April 2026).
- In September 2026 up to 2026-09-19 (19 September 2026), Ireland and Northern Ireland (SEM) had 0 hours below zero on 0 days.
- Since 2025-08-16 (16 August 2025), the lowest price in Ireland and Northern Ireland (SEM) was EUR -18.39/MWh on 2025-10-04 (4 October 2025) and the highest EUR 465.05/MWh on 2025-11-25 (25 November 2025).
Hours Below Zero
Delivery days to 2026-09-19, local timeSeptember 2026 to date0 hours
2026 to date4 hours
Share of hours, 20260.06%
Days below zero, 20261 day
| Period | Days with data | Hours below zero | Share of hours | Days below zero | Longest streak of days |
|---|---|---|---|---|---|
| September 2026 to date | 17 | 0 hours | 0.0% | 0 | 0 days |
| 2026 to date | 258 | 4 hours | 0.06% | 1 | 1 day (2026-04-11 to 2026-04-11) |
| Since 2025-08-16 | 396 | 42 hours | 0.4% | 6 | 3 days (2025-10-03 to 2025-10-05) |
Hours are time weighted, so 15 minute and 60 minute intervals count alike. Share of hours divides by 24 times the days with data, so it is approximate on clock change days. A streak is consecutive local days each with at least one interval below zero, not a continuous run of hours.
Source: ENTSO-E Transparency Platform (transparency.entsoe.eu), CC BY 4.0. Aggregated and converted by World Power Monitor; ENTSO-E does not endorse this site. (ENTSO-E Terms of Use plus CC BY 4.0 for listed data items) Data as of 2026-09-19. Computed by World Power Monitor from the day-ahead price statistics of each local delivery day.
Lowest and Highest Prices
EUR/MWh, single market interval| Period | Lowest price | Delivery day | Highest price | Delivery day |
|---|---|---|---|---|
| September 2026 to date | EUR 0.69/MWh | 2026-09-06 (6 September 2026) | EUR 333.00/MWh | 2026-09-16 (16 September 2026) |
| 2026 to date | EUR -10.05/MWh | 2026-04-11 (11 April 2026) | EUR 407.27/MWh | 2026-06-24 (24 June 2026) |
| Since 2025-08-16 | EUR -18.39/MWh | 2025-10-04 (4 October 2025) | EUR 465.05/MWh | 2025-11-25 (25 November 2025) |
The lowest and highest prices are single market intervals of 15 or 60 minutes, not daily averages. The delivery day is the local day the interval belongs to.
Source: ENTSO-E Transparency Platform (transparency.entsoe.eu), CC BY 4.0. Aggregated and converted by World Power Monitor; ENTSO-E does not endorse this site. (ENTSO-E Terms of Use plus CC BY 4.0 for listed data items) Data as of 2026-09-19.
Hours Below Zero Each Day
Local delivery days, 2025-08-16 to 2026-09-19Daily hours through 2026-09-19
| Delivery day (local) | Hours below zero |
|---|---|
| 2025-08-16 | 0 hours |
| 2025-08-17 | 0 hours |
| 2025-08-18 | 0 hours |
| 2025-08-19 | 0 hours |
| 2025-08-20 | 0 hours |
| 2025-08-21 | 0 hours |
| 2025-08-22 | 0 hours |
| 2025-08-23 | 0 hours |
| 2025-08-24 | 0 hours |
| 2025-08-25 | 0 hours |
| 2025-08-26 | 0 hours |
| 2025-08-27 | 0 hours |
| 2025-08-28 | 0 hours |
| 2025-08-29 | 0 hours |
| 2025-08-30 | 0 hours |
| 2025-08-31 | 0 hours |
| 2025-09-01 | 0 hours |
| 2025-09-02 | 0 hours |
| 2025-09-03 | 0 hours |
| 2025-09-04 | 0 hours |
| 2025-09-05 | 0 hours |
| 2025-09-06 | 0 hours |
| 2025-09-07 | 6 hours |
| 2025-09-08 | 0 hours |
| 2025-09-09 | 0 hours |
| 2025-09-10 | 0 hours |
| 2025-09-11 | 0 hours |
| 2025-09-12 | 0 hours |
| 2025-09-13 | 0 hours |
| 2025-09-14 | 0 hours |
| 2025-09-15 | 6 hours |
| 2025-09-16 | 0 hours |
| 2025-09-17 | 0 hours |
| 2025-09-18 | 0 hours |
| 2025-09-19 | 0 hours |
| 2025-09-20 | 0 hours |
| 2025-09-21 | 0 hours |
| 2025-09-22 | 0 hours |
| 2025-09-23 | 0 hours |
| 2025-09-24 | 0 hours |
| 2025-09-25 | 0 hours |
| 2025-09-26 | 0 hours |
| 2025-09-27 | 0 hours |
| 2025-09-28 | 0 hours |
| 2025-09-29 | 0 hours |
| 2025-09-30 | 0 hours |
| 2025-10-01 | 0 hours |
| 2025-10-02 | 0 hours |
| 2025-10-03 | 1 hour |
| 2025-10-04 | 19 hours |
| 2025-10-05 | 6 hours |
| 2025-10-06 | 0 hours |
| 2025-10-07 | 0 hours |
| 2025-10-08 | 0 hours |
| 2025-10-09 | 0 hours |
| 2025-10-10 | 0 hours |
| 2025-10-11 | 0 hours |
| 2025-10-12 | 0 hours |
| 2025-10-13 | 0 hours |
| 2025-10-14 | 0 hours |
| 2025-10-15 | 0 hours |
| 2025-10-16 | 0 hours |
| 2025-10-17 | 0 hours |
| 2025-10-18 | 0 hours |
| 2025-10-19 | 0 hours |
| 2025-10-20 | 0 hours |
| 2025-10-21 | 0 hours |
| 2025-10-22 | 0 hours |
| 2025-10-23 | 0 hours |
| 2025-10-24 | 0 hours |
| 2025-10-25 | 0 hours |
| 2025-10-26 | 0 hours |
| 2025-10-27 | 0 hours |
| 2025-10-28 | 0 hours |
| 2025-10-29 | 0 hours |
| 2025-10-30 | 0 hours |
| 2025-10-31 | 0 hours |
| 2025-11-01 | 0 hours |
| 2025-11-02 | 0 hours |
| 2025-11-03 | 0 hours |
| 2025-11-04 | 0 hours |
| 2025-11-05 | 0 hours |
| 2025-11-06 | 0 hours |
| 2025-11-07 | 0 hours |
| 2025-11-08 | 0 hours |
| 2025-11-09 | 0 hours |
| 2025-11-10 | 0 hours |
| 2025-11-11 | 0 hours |
| 2025-11-12 | 0 hours |
| 2025-11-13 | 0 hours |
| 2025-11-14 | 0 hours |
| 2025-11-15 | 0 hours |
| 2025-11-16 | 0 hours |
| 2025-11-17 | 0 hours |
| 2025-11-18 | 0 hours |
| 2025-11-19 | 0 hours |
| 2025-11-20 | 0 hours |
| 2025-11-21 | 0 hours |
| 2025-11-22 | 0 hours |
| 2025-11-23 | 0 hours |
| 2025-11-24 | 0 hours |
| 2025-11-25 | 0 hours |
| 2025-11-26 | 0 hours |
| 2025-11-27 | 0 hours |
| 2025-11-28 | 0 hours |
| 2025-11-29 | 0 hours |
| 2025-11-30 | 0 hours |
| 2025-12-01 | 0 hours |
| 2025-12-02 | 0 hours |
| 2025-12-03 | 0 hours |
| 2025-12-04 | 0 hours |
| 2025-12-05 | 0 hours |
| 2025-12-06 | 0 hours |
| 2025-12-07 | 0 hours |
| 2025-12-08 | 0 hours |
| 2025-12-09 | 0 hours |
| 2025-12-10 | 0 hours |
| 2025-12-11 | 0 hours |
| 2025-12-12 | 0 hours |
| 2025-12-13 | 0 hours |
| 2025-12-14 | 0 hours |
| 2025-12-15 | 0 hours |
| 2025-12-16 | 0 hours |
| 2025-12-17 | 0 hours |
| 2025-12-18 | 0 hours |
| 2025-12-19 | 0 hours |
| 2025-12-20 | 0 hours |
| 2025-12-21 | 0 hours |
| 2025-12-22 | 0 hours |
| 2025-12-23 | 0 hours |
| 2025-12-24 | 0 hours |
| 2025-12-25 | 0 hours |
| 2025-12-26 | 0 hours |
| 2025-12-27 | 0 hours |
| 2025-12-28 | 0 hours |
| 2025-12-29 | 0 hours |
| 2025-12-30 | 0 hours |
| 2025-12-31 | 0 hours |
| 2026-01-01 | 0 hours |
| 2026-01-02 | 0 hours |
| 2026-01-03 | 0 hours |
| 2026-01-04 | 0 hours |
| 2026-01-05 | 0 hours |
| 2026-01-06 | 0 hours |
| 2026-01-07 | 0 hours |
| 2026-01-08 | 0 hours |
| 2026-01-09 | 0 hours |
| 2026-01-10 | 0 hours |
| 2026-01-11 | 0 hours |
| 2026-01-12 | 0 hours |
| 2026-01-13 | 0 hours |
| 2026-01-14 | 0 hours |
| 2026-01-15 | 0 hours |
| 2026-01-16 | 0 hours |
| 2026-01-17 | 0 hours |
| 2026-01-18 | 0 hours |
| 2026-01-19 | 0 hours |
| 2026-01-20 | 0 hours |
| 2026-01-21 | 0 hours |
| 2026-01-22 | 0 hours |
| 2026-01-23 | 0 hours |
| 2026-01-24 | 0 hours |
| 2026-01-25 | 0 hours |
| 2026-01-26 | 0 hours |
| 2026-01-27 | 0 hours |
| 2026-01-28 | 0 hours |
| 2026-01-29 | 0 hours |
| 2026-01-30 | 0 hours |
| 2026-01-31 | 0 hours |
| 2026-02-01 | 0 hours |
| 2026-02-02 | 0 hours |
| 2026-02-03 | 0 hours |
| 2026-02-04 | 0 hours |
| 2026-02-05 | 0 hours |
| 2026-02-06 | 0 hours |
| 2026-02-07 | 0 hours |
| 2026-02-08 | 0 hours |
| 2026-02-09 | 0 hours |
| 2026-02-10 | 0 hours |
| 2026-02-11 | 0 hours |
| 2026-02-12 | 0 hours |
| 2026-02-13 | 0 hours |
| 2026-02-14 | 0 hours |
| 2026-02-15 | 0 hours |
| 2026-02-16 | 0 hours |
| 2026-02-17 | 0 hours |
| 2026-02-18 | 0 hours |
| 2026-02-19 | 0 hours |
| 2026-02-20 | 0 hours |
| 2026-02-21 | 0 hours |
| 2026-02-22 | 0 hours |
| 2026-02-23 | 0 hours |
| 2026-02-24 | 0 hours |
| 2026-02-25 | 0 hours |
| 2026-02-26 | 0 hours |
| 2026-02-27 | 0 hours |
| 2026-02-28 | 0 hours |
| 2026-03-01 | 0 hours |
| 2026-03-02 | 0 hours |
| 2026-03-03 | 0 hours |
| 2026-03-04 | 0 hours |
| 2026-03-05 | 0 hours |
| 2026-03-06 | 0 hours |
| 2026-03-07 | 0 hours |
| 2026-03-08 | 0 hours |
| 2026-03-09 | 0 hours |
| 2026-03-10 | 0 hours |
| 2026-03-11 | 0 hours |
| 2026-03-12 | 0 hours |
| 2026-03-13 | 0 hours |
| 2026-03-14 | 0 hours |
| 2026-03-15 | 0 hours |
| 2026-03-16 | 0 hours |
| 2026-03-17 | 0 hours |
| 2026-03-18 | 0 hours |
| 2026-03-19 | 0 hours |
| 2026-03-20 | 0 hours |
| 2026-03-21 | 0 hours |
| 2026-03-22 | 0 hours |
| 2026-03-23 | 0 hours |
| 2026-03-24 | 0 hours |
| 2026-03-25 | 0 hours |
| 2026-03-26 | 0 hours |
| 2026-03-27 | 0 hours |
| 2026-03-28 | 0 hours |
| 2026-03-29 | 0 hours |
| 2026-03-30 | 0 hours |
| 2026-03-31 | 0 hours |
| 2026-04-01 | 0 hours |
| 2026-04-02 | 0 hours |
| 2026-04-03 | 0 hours |
| 2026-04-04 | 0 hours |
| 2026-04-05 | 0 hours |
| 2026-04-06 | 0 hours |
| 2026-04-07 | 0 hours |
| 2026-04-08 | 0 hours |
| 2026-04-09 | 0 hours |
| 2026-04-10 | 0 hours |
| 2026-04-11 | 4 hours |
| 2026-04-12 | 0 hours |
| 2026-04-13 | 0 hours |
| 2026-04-14 | 0 hours |
| 2026-04-15 | 0 hours |
| 2026-04-16 | 0 hours |
| 2026-04-17 | 0 hours |
| 2026-04-18 | 0 hours |
| 2026-04-19 | 0 hours |
| 2026-04-20 | 0 hours |
| 2026-04-21 | 0 hours |
| 2026-04-22 | 0 hours |
| 2026-04-23 | 0 hours |
| 2026-04-24 | 0 hours |
| 2026-04-25 | 0 hours |
| 2026-04-26 | 0 hours |
| 2026-04-27 | 0 hours |
| 2026-04-28 | 0 hours |
| 2026-04-29 | 0 hours |
| 2026-04-30 | 0 hours |
| 2026-05-01 | 0 hours |
| 2026-05-02 | 0 hours |
| 2026-05-03 | 0 hours |
| 2026-05-04 | 0 hours |
| 2026-05-05 | 0 hours |
| 2026-05-06 | 0 hours |
| 2026-05-07 | 0 hours |
| 2026-05-08 | 0 hours |
| 2026-05-09 | 0 hours |
| 2026-05-10 | 0 hours |
| 2026-05-11 | 0 hours |
| 2026-05-12 | 0 hours |
| 2026-05-13 | 0 hours |
| 2026-05-14 | 0 hours |
| 2026-05-15 | 0 hours |
| 2026-05-16 | 0 hours |
| 2026-05-17 | 0 hours |
| 2026-05-18 | 0 hours |
| 2026-05-19 | 0 hours |
| 2026-05-20 | 0 hours |
| 2026-05-21 | 0 hours |
| 2026-05-22 | 0 hours |
| 2026-05-23 | 0 hours |
| 2026-05-24 | 0 hours |
| 2026-05-25 | 0 hours |
| 2026-05-26 | 0 hours |
| 2026-05-27 | 0 hours |
| 2026-05-28 | 0 hours |
| 2026-05-29 | 0 hours |
| 2026-05-30 | 0 hours |
| 2026-05-31 | 0 hours |
| 2026-06-01 | 0 hours |
| 2026-06-02 | 0 hours |
| 2026-06-03 | 0 hours |
| 2026-06-04 | 0 hours |
| 2026-06-05 | 0 hours |
| 2026-06-06 | 0 hours |
| 2026-06-07 | 0 hours |
| 2026-06-08 | 0 hours |
| 2026-06-09 | 0 hours |
| 2026-06-10 | 0 hours |
| 2026-06-11 | 0 hours |
| 2026-06-12 | 0 hours |
| 2026-06-13 | 0 hours |
| 2026-06-14 | 0 hours |
| 2026-06-15 | 0 hours |
| 2026-06-16 | 0 hours |
| 2026-06-17 | 0 hours |
| 2026-06-18 | 0 hours |
| 2026-06-19 | 0 hours |
| 2026-06-20 | 0 hours |
| 2026-06-21 | 0 hours |
| 2026-06-22 | 0 hours |
| 2026-06-23 | 0 hours |
| 2026-06-24 | 0 hours |
| 2026-06-25 | 0 hours |
| 2026-06-26 | 0 hours |
| 2026-06-27 | 0 hours |
| 2026-06-28 | 0 hours |
| 2026-06-29 | 0 hours |
| 2026-06-30 | 0 hours |
| 2026-07-01 | 0 hours |
| 2026-07-02 | 0 hours |
| 2026-07-03 | 0 hours |
| 2026-07-04 | 0 hours |
| 2026-07-05 | 0 hours |
| 2026-07-06 | 0 hours |
| 2026-07-07 | 0 hours |
| 2026-07-08 | 0 hours |
| 2026-07-09 | 0 hours |
| 2026-07-10 | 0 hours |
| 2026-07-11 | 0 hours |
| 2026-07-12 | 0 hours |
| 2026-07-13 | 0 hours |
| 2026-07-14 | 0 hours |
| 2026-07-15 | 0 hours |
| 2026-07-16 | 0 hours |
| 2026-07-17 | 0 hours |
| 2026-07-18 | 0 hours |
| 2026-07-19 | 0 hours |
| 2026-07-20 | 0 hours |
| 2026-07-21 | 0 hours |
| 2026-07-22 | 0 hours |
| 2026-07-23 | n/a |
| 2026-07-24 | n/a |
| 2026-07-25 | 0 hours |
| 2026-07-26 | 0 hours |
| 2026-07-27 | 0 hours |
| 2026-07-28 | 0 hours |
| 2026-07-29 | 0 hours |
| 2026-07-30 | 0 hours |
| 2026-07-31 | 0 hours |
| 2026-08-01 | 0 hours |
| 2026-08-02 | 0 hours |
| 2026-08-03 | 0 hours |
| 2026-08-04 | 0 hours |
| 2026-08-05 | 0 hours |
| 2026-08-06 | 0 hours |
| 2026-08-07 | 0 hours |
| 2026-08-08 | 0 hours |
| 2026-08-09 | 0 hours |
| 2026-08-10 | 0 hours |
| 2026-08-11 | 0 hours |
| 2026-08-12 | 0 hours |
| 2026-08-13 | 0 hours |
| 2026-08-14 | 0 hours |
| 2026-08-15 | 0 hours |
| 2026-08-16 | 0 hours |
| 2026-08-17 | 0 hours |
| 2026-08-18 | 0 hours |
| 2026-08-19 | 0 hours |
| 2026-08-20 | 0 hours |
| 2026-08-21 | 0 hours |
| 2026-08-22 | 0 hours |
| 2026-08-23 | 0 hours |
| 2026-08-24 | 0 hours |
| 2026-08-25 | 0 hours |
| 2026-08-26 | 0 hours |
| 2026-08-27 | 0 hours |
| 2026-08-28 | 0 hours |
| 2026-08-29 | 0 hours |
| 2026-08-30 | 0 hours |
| 2026-08-31 | 0 hours |
| 2026-09-01 | 0 hours |
| 2026-09-02 | n/a |
| 2026-09-03 | n/a |
| 2026-09-04 | 0 hours |
| 2026-09-05 | 0 hours |
| 2026-09-06 | 0 hours |
| 2026-09-07 | 0 hours |
| 2026-09-08 | 0 hours |
| 2026-09-09 | 0 hours |
| 2026-09-10 | 0 hours |
| 2026-09-11 | 0 hours |
| 2026-09-12 | 0 hours |
| 2026-09-13 | 0 hours |
| 2026-09-14 | 0 hours |
| 2026-09-15 | 0 hours |
| 2026-09-16 | 0 hours |
| 2026-09-17 | 0 hours |
| 2026-09-18 | 0 hours |
| 2026-09-19 | 0 hours |
Source: ENTSO-E Transparency Platform (transparency.entsoe.eu), CC BY 4.0. Aggregated and converted by World Power Monitor; ENTSO-E does not endorse this site. (ENTSO-E Terms of Use plus CC BY 4.0 for listed data items) Data as of 2026-09-19.
Month by Month
First and latest months may be partial| Month | Days with data | Hours below zero | Days below zero | Lowest price | Highest price |
|---|---|---|---|---|---|
| August 2025 | 16 | 0 hours | 0 | EUR 0.00/MWh | EUR 288.98/MWh |
| September 2025 | 30 | 12 hours | 2 | EUR -3.19/MWh | EUR 232.89/MWh |
| October 2025 | 31 | 26 hours | 3 | EUR -18.39/MWh | EUR 323.29/MWh |
| November 2025 | 30 | 0 hours | 0 | EUR 2.14/MWh | EUR 465.05/MWh |
| December 2025 | 31 | 0 hours | 0 | EUR 7.00/MWh | EUR 281.59/MWh |
| January 2026 | 31 | 0 hours | 0 | EUR 48.39/MWh | EUR 287.39/MWh |
| February 2026 | 28 | 0 hours | 0 | EUR 20.10/MWh | EUR 257.47/MWh |
| March 2026 | 31 | 0 hours | 0 | EUR 0.00/MWh | EUR 348.88/MWh |
| April 2026 | 30 | 4 hours | 1 | EUR -10.05/MWh | EUR 297.16/MWh |
| May 2026 | 31 | 0 hours | 0 | EUR 78.15/MWh | EUR 265.73/MWh |
| June 2026 | 30 | 0 hours | 0 | EUR 5.54/MWh | EUR 407.27/MWh |
| July 2026 | 29 | 0 hours | 0 | EUR 9.73/MWh | EUR 292.25/MWh |
| August 2026 | 31 | 0 hours | 0 | EUR 8.78/MWh | EUR 311.50/MWh |
| September 2026 | 17 | 0 hours | 0 | EUR 0.69/MWh | EUR 333.00/MWh |
Prices are day-ahead, in EUR per MWh. A negative price means sellers pay to deliver electricity in that interval, usually when wind and solar output is high and demand is low; the explanation and the ranking of all zones are on the main page.
Source: ENTSO-E Transparency Platform (transparency.entsoe.eu), CC BY 4.0. Aggregated and converted by World Power Monitor; ENTSO-E does not endorse this site. (ENTSO-E Terms of Use plus CC BY 4.0 for listed data items) Data as of 2026-09-19.