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Thu, May 28, 2020 10:12 AM

M-A041420-03 Invitation to Test Market Information System (MIS) Sandbox

NOTICE DATE: May 28, 2020

NOTICE TYPE: M-A041420-03 Release

SHORT DESCRIPTION: Invitation to Test Market Information System (MIS) Sandbox

INTENDED AUDIENCE: Market Information System (MIS) Users

DAYS AFFECTED: May 28, 2020

LONG DESCRIPTION: ERCOT has released a sandbox version of the updated Market Information System (MIS) to the Market Operations Test Environment (MOTE). MIS users are encouraged to explore the sandbox version of MIS at

Chrome is the preferred browser for this site. Using Internet Explorer may cause display issues. Please see the release notes attachment for more details.

The sandbox version will not require digital certificates or provide access to applications, public, secure, or certified data. It will include a refreshed look, new navigational structure, and enhanced sorting and search capabilities.

ERCOT is asking MIS users to test the sandbox and provide feedback in one or more of the following methods:

MIS upgrade timeline:

  • January 2020: ERCOT Market Information List (EMIL) web interface - Complete
  • May 28, 2020: Sandbox version of new MIS available for feedback
  • September 2020: New MIS available for testing
  • November 2020: New MIS go-live (will run in parallel with current MIS until Q1 2021)

ACTION REQUIRED: Please forward this notice to frequent MIS users in your organization and encourage them to test the MIS sandbox at and provide feedback anytime between Thursday, May 28 and Wednesday, June 24, 2020.

See attached release notes for additional details. See attached information map to view information movement from the current MIS to the new sandbox version of MIS.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at

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MIS Sandbox Release Notes 052820.pdf (May 28, 2020 – pdf)

MIS-InfoMap.xlsx (May 28, 2020 – xlsx)