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 Using The Site 

Welcome to SEMO's new website

SEMO launched this new site on Monday 28th June, 2010.

This page provides an overview of some of the features on the new site.

For any queries on how to use this site please contact the SEMO Market Helpdesk

Our  Go Live Bulletin describes some of the new features in more detail.

Resources available on this site

Help pages
SEMO Dictionary - provides on-line definitions of terms used by the SEM
Market Training pages - Training materials and factsheets
 Change Request form - Use this to request changes or improvements to the SEMO Website
View our Sitemap to help locate what you are looking for
Help on opening office documents from the SEMO website

About this Site


The new homepage provides a graphical representation of the latest data (Prices and Load) coming from the Market Systems for each of the three run types.

A message board provides indication of any incidents happening in the Market or other communications issued by the Market Helpdesk.

Market Data

Dynamic Reporting: An online Reporting Database has been implemented allowing you to view Market data on-line and to download data to your own PC.  Visit our Market Data page to create an account and to start viewing data.

Please note: even if you have signed up for email Alerts, you will need to register separately for Market Data.

Static Reporting: The legacy flat files output by SEMO's Central Market Systems can be found in the Static Reports section and are available for manual download in this area. 

The legacy format of Market Data "Data Publication Reports" can be found in our General Publications section. 

In addition, the flat files can be downloaded by FTP via the normal FTP mechanism described in the GPUD document.  The FTP site URL is

Settlement Calendar

The Settlement Calendar format has changed to be easier to navigate.  Visit the Settlement Calendar page and view or download the details.


You can sign up for email notifications on our site.  A number of different mailing lists have been set up.  Please note: even if you have signed up for Market Data, you need to subscribe separately for email alerts.

A number of RSS feeds have also been implemented, which allow you to synchronise data from our site to an RSS reader, e.g. Outlook, Internet browser or mobile phone.

SEMO is a joint venture between EirGrid PLC and SONI Limited