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ERCOT Client Services <[log in to unmask]>
Tue, 11 Sep 2018 18:31:15 +0000
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***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. *****

NOTICE DATE:  September 11, 2018

NOTICE TYPE:  W-A091117-01 Operations

SHORT DESCRIPTION:  ERCOT MOTE will be open for DST testing

INTENDED AUDIENCE: QSE operations personnel

DAY AFFECTED:  September 24 - 28, 2018

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.  Note that there is 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.


Simulated time

MOTE system DST Testing

9/24/18 2:00 PM

11/2/18 2:00 AM

MOTE Servers Normal Time change to DST Time

9/24/18 4:00 PM

11/2/18 4:00 AM

Start testing QSE submissions for next 7 days including Long Day 11/04/2017 Operating Day

9/24/18 10:00 PM

11/2/18 10:00 AM

DAM close for Operating Day 11/03/2018

9/25/18 10:00 PM

11/3/18 10:00 AM

DAM close for Operating Day 11/04/2018 (Long DST Day)

9/26/18 2:00 PM

11/4/18 2:00 AM

DST Transition Time

9/26/18 3:00 PM

11/4/18 2:00* AM

DST Repeated Hour

9/26/18 11:00 PM

11/4/18 10:00 AM

DAM close for Operating Day 11/05/2018

9/28/18 2:00 PM

11/6/18 1:00 AM

Close of Test and MOTE Servers DST Time Change to Normal Time

ADDITIONAL INFORMATION:  For information regarding submissions, including Daylight Saving Time requirements, please refer to the latest version of the EIP External Interfaces Specification v1.20K document<> found on the ERCOT website for use of the External Web Services (EWS). The most recent External Web Services XSD<> may also be found in the same location.

During testing, the URL for XML submissions will be:

The URL for UI submissions will be:

The following are examples of how the Long DST Day November 4, 2018 are labeled:


0200 (Normal Hour)

0200* (Repeated Hour)




The MOTE MPIM application will be unavailable for the duration of the DST testing.

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 [log in to unmask]<mailto:[log in to unmask]>.

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