Active Messages

SubjectApplicationMessage DetailsStart Date of ChangeEnd Date of Change
Maintenance to Data Miner in Prod. on April 7 from 4:00 p.m. - 7:00 p.m. EPT
  • Data Miner 2
Tool or website outage, Re-login
Please share within your organization

Key Messages

  1. Share this communication internally within your organization to anyone who may need this information​​​​​​
  2. Users may need to re-authenticate to applications
  3. Update any hard certificate binding configurations for Data Miner API connections after the update

PJM will be performing maintenance to Data Miner in the Production environment on Tuesday, April 7, 2026, 4:00 p.m. - 7:00 p.m. EPT (1600 - 1900 hours).

The update may cause connectivity failure up to 5 minutes.

If users experience any connectivity failure during this time, users should retry their connection attempts.

Any hard certificate binding configured in automation scripts will need to be modified by the client after the update.

4/7/2026 16:004/7/2026 19:00
Rescheduled: Maintenance to eDART Train and Production April 8, 2026, from 1:00 p.m. to 5:00 p.m. EPT
  • eDART
Tool or website outage
Please share within your organization

The eDART maintenance release communicated below has been rescheduled to Wednesday, April 8, 2026, from 1:00 p.m. - 5:00 p.m. EPT (1300 - 1700 hours).

During the release there will be an outage of up to 5 minutes for certain portions of the eDART system and error messages may be generated.

****Previously sent message****

PJM will perform maintenance to eDART in the Training and Production environments on Tuesday, March 31, 2026, from 11:00 a.m. to 3:00 p.m. EPT (1100 to 1500).

During the release there will be an outage of up to 5 minutes for certain portions of the eDART system and error messages may be generated.

4/8/2026 13:004/8/2026 17:00
Maintenance to BLIT in Prod. and Train on April 8 from 4:30 p.m. - 6:00 p.m. EPT
  • Billing Line Item Transfer
Tool or website outage
Users will be unable to access tool or website, Please share within your organization

PJM will be performing system maintenance to Billing Line Item Transfer in the Production and Train environments on Wednesday, April 8, 2026, from 4:30 p.m. - 6:00 p.m. EPT (1630 - 1800 hours). During this maintenance, there will be an outage of up to 15 minutes.

4/8/2026 16:304/8/2026 18:00
Linden Scheduling Restriction
  • ExSchedule
  • OASIS

The Linden path is restricted to 0MWs from April 6, 2026 08:00 until April 11, 2026 15:00 due to eDART ticket 1271720 & 1285134.


Please reference the Transmission Facilities Outage List for the above mentioned eDART ticket in the event of updates done after this posting.


https://edart.pjm.com/reports/linesout.txt

4/6/2026 08:004/11/2026 15:00
Rescheduled: Maintenance to Markets Gateway and Stale Data in Prod. moving to April 9 from 2:50 p.m. - 5:00 p.m. EPT
  • Data Miner 2
  • Data Viewer
  • Markets Gateway
  • PJM Now
  • PJM.com and other subsidiary websites
Tool or website outage, Stale Data
Users will be unable to access tool or website, Please share within your organization

The maintenance communication below has been rescheduled to Thursday, April 9, 2026, from 2:50 p.m. - 5:00 p.m. EPT (1450-1700 hours).

****Previous Message****

PJM will be performing system maintenance to Markets Gateway in the Production environment on Thursday, April 2, 2025, from 2:50 p.m. - 5:00 p.m. EPT (1450-1700 hours).

During this maintenance, there will be an outage of up to 30 minutes to Markets Gateway.

Stale data will appear on Data Miner, Data Viewer, PJM.com, and PJM Now.

4/9/2026 14:504/9/2026 17:00
Maintenance to Various Tools in Prod. and Train on April 9 from 5:00 p.m. - 6:00 p.m. EPT
  • Cost Agent
  • Data Viewer
  • DER Directory
  • ELCC Calculator
  • Messages
  • NextGen
  • PJM Tools Home Page
  • Planning Center - Queue Scope
  • Resource Tracker
Tool or website outage
Please share within your organization

PJM will be performing system maintenance in the Production and Train environments on Thursday, April 9, 2026, from 5:00 p.m. - 6:00 p.m. EPT (1700-1800 hours). During this maintenance, there will be an outage of up to 1 hour.

Impacted Tools:

  1. Cost Agent (Production only - No Train environment for this tool)
  2. Data Viewer (Production only - No Train environment for this tool)
  3. DER Directory
  4. ELCC Calculator (Production only - No Train environment for this tool)
  5. Messages
  6. NextGen
  7. PJM Tools home page
  8. Queue Scope
  9. Resource Tracker (Production only - No Train environment for this tool)​​​
4/9/2026 17:004/9/2026 18:00
Maintenance to Secure Share in Prod. on April 9 from 4:00 p.m. - 7:00 p.m. EPT
  • PJM.com and other subsidiary websites
Tool or website outage
Please share within your organization


PJM will be performing system maintenance in the Production environment on Thursday, April 9, 2026, from 4:00 p.m. - 7:00 p.m. EPT (1600 - 1900 hours).

During this maintenance, there will be an outage of up to 1 hour.

Impacted Tool

. Secure Share


4/9/2026 16:004/9/2026 19:00
Increased Reserve Requirements
  • Markets Gateway
  • Messages
No action required/information only, Please share within your organization

Due to the non-performance of committed Synchronized Reserve resources during Synchronized Reserve Events since the implementation of Reserve Price Formation (October 1, 2022) and to maintain compliance with NERC Standards, effective from May 19, 2023, PJM carried an additional 30% on the Reliability requirement component of Synchronized and Primary reserve in the RTO only in the Day-Ahead, and Real-time Markets for all hours. Effective January 9, 2026 instead of 30% PJM will carry an additional 20% on the Reliability requirement component of Synchronized and Primary reserve in the RTO only in the Day-Ahead, and Real-time Markets for all hours until further notice.


For example (rounded to whole MW): If the largest single contingency = 1,630 MW


Default (100% of largest contingency)

Synchronized Reserve requirement: 1,630*1 + 190 = 1,820 MW

Primary Reserve requirement: 1,630*1.5 + 190 = 2,635 MW

30-Minute Reserve requirement: Max(3,000, gas contingency, PR reliability) + 190 = 3,190 MW


Increased reliability by 20%

Synchronized Reserve requirement: 1,630*1.2 + 190 = 2,146 MW

Primary Reserve requirement: 1,630*1.2*1.5 + 190 = 3,124 MW

30-Minute Reserve requirement: Max(3,000, gas contingency, PR reliability) + 190 = 3000 + 190 = 3,190 MW


If you have any questions regarding this message, please contact PJM Customer Service at (866) 400-8980 or send an email to custsvc@pjm.com. Thank you.

1/8/2026 00:0012/31/2026 00:00