NOTICE DATE: February 4, 2026
NOTICE TYPE: M-A020426-01 Operations
SHORT DESCRIPTION: ERCOT MOTE will be open for DST testing
INTENDED AUDIENCE: QSE operations personnel
DAYS AFFECTED: February 9, 2026, through February 13, 2026
LONG DESCRIPTION: The ERCOT Market Operations Test Environment (MOTE) will be available for Market Participant Daylight Saving Time (DST) testing as listed in the table below. There is only one period for testing this year. The testing period will be from Monday through Friday and will follow the simulated times shown in the table.
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Real Time
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Simulated Time
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MOTE System Activity
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Mon 2/9/2026 14:00
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Fri 3/6/2026 2:00
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MOTE servers Normal Time change to DST Time
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Mon 2/9/2026 17:00
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Fri 3/6/2026 5:00
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Start testing QSE submissions for next 5 days, including Short Day 3/8/2026
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Mon 2/9/2026 22:00
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Fri 3/6/2026 10:00
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DAM close for Operating Day 3/7/2026
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|
Tue 2/10/2026 22:00
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Sat 3/7/2026 10:00
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DAM close for Operating Day 3/8/2026 (Short DST Day)
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Wed 2/11/2026 13:00
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Sun 3/8/2026 1:00
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CST Time
|
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Wed 2/11/2026 14:00
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Sun 3/8/2026 3:00
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DST Transition Time - CDT
|
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Wed 2/11/2026 21:00
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Sun 3/8/2026 10:00
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DAM close for Operating Day 3/9/2026
|
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Thu 2/12/2026 21:00
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Mon 3/9/2026 10:00
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DAM close for Operating Day 3/10/2026
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|
Fri 2/13/2026 14:00
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Tue 3/10/2026 3:00
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Close of testing and MOTE servers DST Time change to Normal Time
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ADDITIONAL INFORMATION: For information regarding submissions, including DST requirements, please refer to the latest version of the EIP External Interface Specifications document for use of the External Web Services (EWS) found on the XSDs webpage. The most recent External Web Services XSD may also be found in the same location.
For MOTE testing, the URL for XML submissions is: https://testmisapi.ercot.com/NodalAPI/EWS/
The URL for UI submissions is: https://testmis.ercot.com/mmsui/mmsui/displayTradesLanding.action
The following are examples of how the Short DST Day March 8, 2025, will be labeled:
0100
0200
0400
0500
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 ClientServices@ercot.com.
If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.
dg