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  • Enhanced Optional STOR

  • National Grid has a requirement for provision of a volume of an Enhanced Optional STOR Service from non-BM Providers on a trial basis for this winter. This service creates an opportunity for National Grid to access additional non-BM volume closer to the real time. We would like to invite tenders from industry providers who can meet the necessary technical and commercial criteria to participate in this service.

    The deadline for tender submission is 8th January 2016 12:00pm.

    We will run a webinar on 5th January 2016 13:00 – 15:00 to explain the service in detail and answer any queries you may have. If you would like to participate in the webinar, please register your interest by emailing:

    Your Contacts for this service trail are: Rebecca Yang ( or Nick Blair (

    Invitation to Tender Documents

    All relevant documents for this Enhanced Optional STOR Service are published below.

  • Invitation to Tender Documents

  • 30 May 2017
    Flexible DTU assessments - April 2017
    24 KB

    11 Apr 2017
    Flexible DTU tender submission template_final
    17 KB

    16 Mar 2017
    Fixed DTU 2017 results_published
    23 KB

    25 Jan 2017
    Appendix 5 - Worked example of the baseline methodology
    29 KB

    24 Jan 2017
    Fixed DTU tender submission template_final_xlxs
    17 KB

    06 Jan 2016
    Enhanced Optional STOR Guidance Note
    255 KB

    21 Dec 2015
    Invitation for Tender Final
    133 KB

    21 Dec 2015
    Optional STOR Trial Tender Submission Spreadsheet v_1
    159 KB

    13 Jan 2016
    Enhanced Optional STOR Service_Appendix Template
    213 KB