General Outage Information

Generation Outages

EirGrid and SONI develop and implement a Generation Outage Plan. This ensures co-ordination of  “planned outages”, when power stations will not be available due to maintenance or other reasons.

The Generation Outage Plan takes into account security of supply in Ireland and Northern Ireland, as well as economic operation of the power systems, and the maintenance/resource needs of generators.

For more information on Generation Outage planning or requesting a Generator Outage, please go to Generation Outages. This page also contains the latest outage documents and guidelines.

Transmission Outages

The System Integrity team in EirGrid puts together a Transmission Outage Programme and manages transmission outages. This involves planned times when transmission infrastructure (lines, cables and substations etc.) will be out of service for maintenance. It also involves times when testing, connection of new plant and decommissioning of old plant is carried out.

Transmission maintenance takes place in line with the EirGrid Asset Maintenance Policy to ensure that the transmission system can operate in a safe, secure and reliable manner. A Guide to Transmission Equipment Maintenance is available here.

A high level description of the transmission outage planning process is available here.

For more information on transmission outage planning or requesting a transmission customer outage, visit the transmission outages page.

For information on the availability of Generators, please go to our library and search 'Availability Reports'.

EirGrid and ESBN have published a consultation paper located here.

Outturn Availability

The Single Electricity Market Committee (SEMC) decision SEM-15-071 "Process for the Calculation of Outturn Availability" was published on 29 September 2015.

For information relating to the process for the calculation of outturn availability, please see The EirGrid and SONI Implementation Approach to the SEM Committee Decision Paper SEM-15-071.

The Ireland Ex-Post Outturn Availability Connection Asset Annual Maintenance Plan for the 2020 outage season, as approved by the Regulatory Authorities, is published here.

The Ireland Ex-Ante Outturn Availability Connection Asset Annual Maintenance Plan for the current outage season, as approved by the Regulatory Authorities, is published here.

REMIT Publications

EirGrid will send out updates (via SEM-O Market Messages) to the REMIT publication in the event that there is a significant change to the outage schedule. If market participants wish to be included in an email distribution list, please subscribe at Note that these emails will only be sent during normal office hours.

Regulation on Wholesale Energy Markets Integrity and Transparency (REMIT) is a new EU Regulation (# 1227/2011) which establishes a new framework for the integrity and monitoring of the wholesale energy market. Under REMIT, market participants are obliged to fulfil the obligations described in Article 4 (1) specifically that “Market participants shall publicly disclose in an effective and timely manner inside information which they possess...”

EirGrid and SONI will now publish detailed generator and interconnector unit outage plan updates in a more regular and timely manner to improve transparency and assist market participants in complying with REMIT in this regard.

Thus, in addition to the annual All-Island Outage Plan updated quarterly and the 2-month All-Island Outage Plan published monthly, a new weekly All-Island Outage Plan covering the next 16 weeks will be published here. The report consists of two worksheets; the first sheet shows the outages graphically at a daily level and the second worksheet shows the start and finish times and dates of the outages. Outages are represented with an abbreviation in the files - “S” represents a Scheduled Outage and “F” represents a Forced Outage.

Outage Week 38(2021) - 01(2022) - Published on 15 September 2021

Outage Week 37(2021) - 52(2021) - Published on 08 September 2021

Outage Week 36(2021) - 51(2021) - Published on 01 September 2021

Outage Week 35(2021) - 50(2021) - Published on 25 August 2021

Outage Week 34(2021) - 49(2021) - Published on 19 August 2021

Outage Week 33(2021) - 48(2021) - Published on 11 August 2021

All-Island Outage Plan publications for previous weeks can be found in our Library.

Interconnector Information

Planned Outages

A list of the planned outages which are currently scheduled is available here. Planned outages for 2020 are:

  • 5 to 6 February
  • 18 to 22 March
  • 8 to 9 July
  • 27 August  to 1 September

Forced Outages

Forced outages occurred on the following dates in 2020:

  • 10 July