Active Messages

SubjectApplicationMessage DetailsStart Date of ChangeEnd Date of Change
Temporary Changes to the Synchronized Reserve Requirements
  • Markets Gateway
  • Messages
No action required/information only, Please share within your organization

PJM may carry additional Synchronized Reserve megawatt effective hour ending 09 on March 9, 2026, through hour ending 17 on March 30, 2026, due to a temporary switching condition on the system. The reserve requirements being cleared in real-time can be viewed under the Dispatched Reserves screen in Data Viewer.


If you have any questions, please contact PJM's Member Relations, or 610-666-8980

3/9/2026 08:003/30/2026 16:00
Maintenance to DR Hub in Prod. and Train on March 30 from 3:00 p.m. - 5:00 p.m. EPT
  • DR Hub
Tool or website outage
Users will be unable to access tool or website, Please share within your organization

PJM will be performing a system maintenance to DR Hub in the Production and Train environments on Monday, March 30, 2026, from 3:00 p.m. - 5:00 p.m. EPT (1500 - 1700 hours). During this maintenance, there will be an outage of up to 30 minutes.

Impacted tool

DR Hub

3/30/2026 15:003/30/2026 17:00
Maintenance to Data Miner in Prod. on March 30 from 3:00 p.m. - 6:00 p.m. EPT
  • Data Miner 2
  • Data Viewer
  • 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

During this maintenance, there will be an outage of up to 15 minutes to Data Miner.

Real-Time Unverified Five Minute LMPs feed will be unavailable during this maintenance window. The retention on this feed is being updated to 15 days to improve performance.

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

3/30/2026 15:003/30/2026 18:00
Maintenance to Various Tools in Prod. and Train on March 31 from 5:00 p.m. - 8:30 p.m. EPT
  • Cost Agent
  • Data Viewer
  • DER Directory
  • ELCC Calculator
  • Gas Pipeline
  • Messages
  • NextGen
  • PJM Tools Home Page
  • Planning Center - Queue Scope
  • Resource Tracker
Tool or website outage
Users will be unable to access tool or website, Please share within your organization

PJM will be performing system maintenance in the Production and Train environments on Tuesday, March 31, 2026, from 5:00 p.m. - 8:30 p.m. EPT (1700-2030 hours).

During this maintenance, there will be an outage of up to 3 hours.

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. Gas Pipeline (Production only - No Train environment for this tool)
  6. Messages
  7. NextGen
  8. PJM Tools home page
  9. Queue Scope
  10. Resource Tracker (Production only - No Train environment for this tool)


3/31/2026 17:003/31/2026 20:30
Special Message for the Day Ahead Market
  • Markets Gateway
  • Messages
No action required/information only, Please share within your organization

Per FERC Order 881, effective for market day 3/4 and forward the Day Ahead Market will use 881 forecast ratings.

3/3/2026 00:004/4/2026 00:00
Maintenance to Markets Gateway and Stale Data in Prod. on April 2 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

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.

4/2/2026 14:504/2/2026 17:00
LINVFT PJMVFTLD LOAD (1302423, 2/17-4/06) Emergency Outage
  • ExSchedule
  • OASIS

ATC on Linden VFT path is limited to 300MW due to emergency outage submitted vide eDART # 1302423 outage timeframe 02/17/2026 17:00 through 04/06/2026 08:00 as Linden VFT Unit #3 being derated to 90 MW due to excitation issues.



2/17/2026 17:004/6/2026 08:00
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
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