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      Learn how the different electricity markets operate and timelines they work on.

    • Balancing Market

      The Balancing Market determines the imbalance settlement price for settles of the TSO's balancing actions.

      • Joining the Balancing Market
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      • Joining the Capacity Market
      • Capacity Auction Timetable
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    • Market Data

      View the full range of static and dynamic reports available to download.

    • Static Reports

      See libraries of flat file outputs created by the SEMO Central Market Systems.

      • Historic Market Data
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      View market data in online charts or download the data.

    • Settlement Calendar

      Publication dates for settlement statements and documents, and due dates for payments in and out.

  • Publications
    • Publications

      See market related documentation such as monthly and quarterly external reports, generator outages and meeting minutes.

    • General Publications

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  • Rules & Modifications
    • Rules & Modifications

      View all the information you might need on rules and modifications for the Balancing and Capacity Markets.

    • Balancing Market Modifications

      Modifications to the Balancing Market Trading and Settlement Code.

      • Balancing Market Committee Members
      • Balancing Market Elections
      • Balancing Market Rules
      • Submit a Balancing Market Modification Proposal
    • Capacity Market Modifications

      Modifications to the Capacity Market Code.

      • Capacity Market Rules
      • Submit a Capacity Markey Modification Proposal
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    • Training

      Training is intended to provide the learning materials that will help participants fulfil their role in the Markets.

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      View the courses that you can currently take to learn about fulfilling your market obligations.

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      The library provides access to all of the self-learning and instructor-led training materials.

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  2. Legacy SEM
  3. Legacy SEM Publications

Legacy SEM Publications

Download legacy documentation relating to the Single Energy Market, the market that came before today's SEM.

Legacy General Publications

Market related documentation and regulatory reports for the legacy SEM

Find out more about Legacy General Publications

Legacy Market Parameters

Market documentation for the legacy SEM

Find out more about Legacy Market Parameters

Legacy MO Performance

Market Operator performance reporting for the legacy SEM

Find out more about Legacy MO Performance

Legacy Meetings

This area holds all information related to the numerous meetings and engagements relating to the legacy SEM. You can view all meeting related documentation from agendas through to related papers.

Find out more about Legacy Meetings
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Republic of Ireland

The Oval, 160 Shelbourne Road, Ballsbridge, Dublin 4, D04 FW28.

Northern Ireland

Castlereagh House, 12 Manse Road, Belfast, BT6 9RT.
  • Subscribe
  • Market Messages
  • Events
  • Links
  • About SEMO
  • Privacy Statement
  • Cookies
  • Disclaimer
  • Web Accessibility
  • Site Map