NOTICE DATE: March 13, 2023

NOTICE TYPE: M-A030323-03 Outage - Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services

INTENDED AUDIENCE: ERCOT Market Participants

DAYS AFFECTED: March 14, 2023 09:30 – 12:00; March 14, 2023 13:00 - 15:00; March 15, 2023 17:00 – 20:00; March 16, 2023 13:30 – 15:30; March 16, 2023 16:30 – 18:30.

LONG DESCRIPTION: ERCOT will be performing planned system maintenance of several databases and applications March 14 - March 16, 2023.

During the March 14, 2023 09:30 – 12:00 and March 14, 2023 13:00 - 15:00 outage windows, Market Participants may experience intermittent issues with the following services:

• Find ESIID

During the March 15, 2023 17:00 – 20:00 outage window, all services available through the Market Information System (MIS) will be unavailable, including the following:

• Report publishing to the ERCOT MIS
• Downloading of extracts and reports from the MIS and EWS
• Net Dependable Capability and Reactive Capability (NDCRC)
• Congestion Revenue Right (CRR) Market User Interface
• Find ESIID and Find Transaction
• Market Participant Identity Manager (MPIM)
• Market Data Transparency (MDT) Web Services
• Extract Subscriber
• Service Requests

During this outage window, please use the following URLs to directly access the Market Manager, CRR Market User Interface, and Outage Scheduler: 

• https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action
• https://mis.ercot.com/mui-ercot-ihedge/
• https://mis.ercot.com/osrui/osrui/Summary.action

During the March 16, 2023 13:30 – 15:30 outage window, Market Participants may experience intermittent issues with the following services:

• ERCOT.com
• RIOO-RS

During the March 16, 2023 16:30 – 18:30 outage window, Market Participants may experience intermittent issues with the following services:

• Market Participant Identity Manager (MPIM)
• The following ERCOT internet services:
  • Renewable Energy Credit – https://sa.ercot.com/rec/home
  • ERCOT Interconnection Services (GINR) – https://sa.ercot.com/ginr/
• Net Dependable Capability and Reactive Capability (NDCRC)

Note that the outage start times may be delayed depending on the current system conditions.

ADDITIONAL INFORMATION: Reports will be rerun and reposted as applicable. ERCOT.com dashboard displays will not be populated with data during the March 15, 2023 17:00 – 20:00 timeframe.

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].

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