NOTICE DATE: March 28, 2018

NOTICE TYPE: M-B032818-01 Outage – Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services

INTENDED AUDIENCE: ERCOT Market Participants

DAYS AFFECTED: April 2, 2018 17:00 – 19:00, April 3, 2018 16:00 – 18:00, April 4, 2018 09:30 – 12:00

LONG DESCRIPTION: ERCOT will be performing planned system maintenance of several databases and applications on April 2 - 4, 2018.

During the April 2, 2018 17:00 – 19:00 outage window, Market Participants may experience intermittent issues with the following services:

· MPIM

· The following ERCOT internet services:

o Texas Renewables – www.texasrenewables.com/

o Retail Testing Website - etod.ercot.com

· Market Data Transparency (MDT) Web Services

· Extract Subscriber

· Net Dependable Capability and Reactive Capability (NDCRC)

During the April 3, 2018 16:00 – 18:00 outage window, all services available through the Market Information System (MIS) will be unavailable, including the following:

· Market submissions and requests via External Web Services (EWS), Market Manager and Outage Scheduler

· 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

· MPIM

· Market Data Transparency (MDT) Web Services

· Extract Subscriber

· eService

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/osrui/osrui/Summary.action
https://mis.ercot.com/crr/mui/ListAllUserMessage.do (For CRR Account Holders)
https://mis.ercot.com/crr/mui/editSMPCreditLimit.do (For Counter-Parties)

During the April 4, 2018 09:30 – 12:00 outage window, Market Participants may experience intermittent issues with the following services:

· Find ESIID

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. The MIS Dashboards and ERCOT.com price displays will not be populated with data during the April 3, 2018 16:00 – 18:00 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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