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Output Usable Data

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The data files displayed on this page are provided in accordance with Balancing and Settlement Code requirements (in Sections Q6.4 and V4.4). The files contain Output Usable data by System Zone and on a National basis in a format that is suitable for downloading.

"Output Usable" is basically the portion of a Production BM Unit's Registered Capacity that is expected to be available and is not unavailable due to a planned outage. Formal definitions of "Output Usable", "Registered Capacity", "Planned Outage" and "System Zone" can be found in the Glossary and Definitions section of the Grid Code, obtainable via the following link:

http://www.Nationalgridinfo.co.uk/grid_code/mn_current.html

To view a System Zone Map, refer to the publish date/time in the Output Usable Data file upon download and select the map, in PDF format, effective for this date from the table below.

System Zone Map

Notify me when a document is added/updated to this table Notify me when a document is added/updated to this table
TitleEffective FromEffective To Documents to add to basket Notifying of updated documents
PDF IconSystem Zone Map (196Kb)02/04/0231/03/05
PDF IconSystem Zone Map (322Kb)01/04/05Present

The Output Usable information is presented here as follows:

  • The daily peak half hour MW value of Output Usable for each day from the 2nd to the 14th day following the current Operational Day; the filename is displayed as the first date for which data appears in the content of the file. The six previous files, by type (i.e. National or Zone) will be available for download.
  • The daily peak half hour MW value of Output Usable for each day from the 2nd to the 49th day following the current Operational Day (note that this information is produced on an ad-hoc basis, by type i.e. National or Zone); the filename is displayed as the first date for which data appears in the content of the file
  • The weekly peak half hour MW value, for the peak Settlement Period for each week from the 2nd to the 52nd week following the current week; the filename is displayed as the date of the first Monday for which data appears in the content of the file. The three previous files, by type (i.e. National or Zone) will be available for download
  • The weekly peak half hour MW value of Output Usable for each week in separate files for the 1st, 2nd, 3rd, 4th and 5th year ahead; the filename is displayed as the first date for which data appears in the content of the file. The last file, by type, will be available for download

To view Output Usable data please select a file type and whether you wish to view the information on a National or System Zone basis by using the drop down menu above.

Historical Output Usable Data, not displayed on this web page, may be requested for the period from 2 April 2002. Please contact the ELEXON Helpdesk on 020 7380 4222 or by emailing helpdesk@elexon.co.uk indicating the period for which you require the data and the type of file you require.

Should you experience any difficulty in viewing the data displayed please contact the ELEXON Helpdesk. It is recommended that these contact details be noted.

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