Upcoming Changes

Increased Reserve Requirements

1.8.2026 00:00 to 12.31.2026 00:00

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.

Hudson Scheduling Restriction (NY outage)

9.24.2026 15:45 to 1.6.2027 00:00

The Hudson path is restricted to 300MW from Sep 24, 2026 15:45 until Jan 6, 2027 00:00 due to NY outage.

Please reference the NY system for the outage ticket in the event of updates done after this posting.

Formula Rate Data Submission Reminder: Nov 2026

10.7.2026 00:00 to 12.31.2026 23:59

As year-end approaches, some TOs will be submitting formula rate filings for January 2027 - December 2027. Please enter your January 2027 - December 2027 Formula Rate Data into TC Planner by November 14, 2026. Timely submission is important for TC Planner to function well.

Application background, required actions, and available resources are provided below.

Background:

On April 11, 2024 at 3 p.m. EPT PJM launched a new tool, TC Planner tool. Transmission Cost Planner (TC Planner) replaced the previous Transmission Cost Information Center (TCIC). It helps PJM stakeholders in understanding current transmission costs and estimating future transmission costs.

Actions Requested:

1.Access Request: To add formula rate data into TC Planner for your company, write access is needed.

1) An existing account in the PJM Account Manager will automatically grant users read-only access to the TC Planner. No additional access requests are required beyond having a valid Account Manager account.

2) To request write access or to set up a new PJM account, please visit tcplanner-take-a-tour

2.Add both planning and settlement formula rate data (January 2027 - December 2027) into TC Planner for your company by November 14, 2026

Materials & Support:

1.We have available materials, including the User Guide, a Training Demo and Take A Tour document for TC Planner. Those materials show how to submit access request and add formula rate data into TC Planner.

2.Please contact TC Planner support for any questions or concerns.

Maintenance to Secure Share in Prod. on Oct. 21 from 12:30 p.m. - 2:00 p.m. EPT

10.21.2026 from 12:30 to 14:00

PJM will be performing system maintenance in the Production environment on Wednesday, October 21, 2026, from 12:30 ​​p.m. - 2:00 p.m. EPT (1230-1400 hours). During this maintenance, there will be an outage of up to 20 minutes.

​​Impacted Tool - Secure Share

Maintenance to DER Directory and Gas Pipeline in Prod. and Train on Oct. 21 from 1:00 p.m. - 4:00 p.m. EPT

10.21.2026 from 13:00 to 16:00

PJM will be performing system maintenance in the Production and Train environments on Wednesday, October 21, from 1:00 p.m. - 4:00 p.m. EPT (1300 - 1600 hours).

During this maintenance, there will be an outage of up to 10 minutes.

Impacted Tools

DER Directory

Gas Pipeline (Prod Only)

Maintenance to DIMA in Prod. and Train on Oct. 21 from 1:00 p.m. - 5:00 p.m. EPT

10.21.2026 from 13:00 to 17:00

PJM will be performing system maintenance in the Production and Train environments on Wednesday, October 21, 2026, from 1:00 p.m. - 5:00 p.m. EPT (1300-1700 hours). During this maintenance, there will be an outage of up to 15 minutes.

Impacted Tool - DIMA

Maintenance to DIMA in Prod. and Train on Oct. 21 from 1:00 p.m. - 5:00 p.m. EPT

10.21.2026 from 13:00 to 17:00

PJM will be performing system maintenance in the Production and Train environments on Wednesday, October 21, 2026, from 1:00 p.m. - 5:00 p.m. EPT (1300-1700 hours). During this maintenance, there will be an outage of up to 15 minutes.

Impacted Tool - DIMA

Maintenance to Markets Gateway and Stale Data in Prod. on October 21 from 2:45 p.m. - 6:00 p.m. EPT

10.21.2026 from 14:45 to 18:00

PJM will be performing system maintenance to Markets Gateway in the Production environment on Wednesday, October 21, 2026, from 2:45 p.m. - 6:00 p.m. EPT (1445 - 1800 hours).

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

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

Maintenance to Bulletin Board and Messages in Prod. and Train on Oct. 21 from 5:00 p.m. - 7:00 p.m. EPT

10.21.2026 from 17:00 to 19:00

PJM will be performing system maintenance in the Production and Train environments on Wednesday, October 21, 2026, from 5:00 p.m. - 7:00 p.m. EPT (1700-1900 hours). During this maintenance, there will be an outage of up to 15 minutes.

Impacted Tools - Bulletin Board, Messages

Maintenance to Bulletin Board and Messages in Prod. and Train on Oct. 21 from 5:00 p.m. - 7:00 p.m. EPT

10.21.2026 from 17:00 to 19:00

PJM will be performing system maintenance in the Production and Train environments on Wednesday, October 21, 2026, from 5:00 p.m. - 7:00 p.m. EPT (1700-1900 hours). During this maintenance, there will be an outage of up to 15 minutes.

Impacted Tools - Bulletin Board, Messages

Maintenance to eDART Train and Production October 22, 2026, from 11:00 a.m. to 3:00 p.m. EPT

10.22.2026 from 08:00 to 12:00

PJM will perform maintenance to eDART in the Training and Production environments on Thursday, October 22, 2026, from 11:00 a.m. to 3:00 p.m. EPT (1100 to 1500).

During the release there may be a brief outage of up to 5 minutes for certain portions of the eDART Train and Production systems and error messages may be generated.

This maintenance release will activate the full functionality of the Auto Ticket creation for Generation tickets enhancement in eDART Prod.

For additional information please see the Auto Ticket Creation - Frequently Asked Questions.

Maintenance to eDART Train and Production October 22, 2026, from 11:00 a.m. to 3:00 p.m. EPT

10.22.2026 from 08:00 to 12:00

PJM will perform maintenance to eDART in the Training and Production environments on Thursday, October 22, 2026, from 11:00 a.m. to 3:00 p.m. EPT (1100 to 1500).

During the release there may be a brief outage of up to 5 minutes for certain portions of the eDART Train and Production systems and error messages may be generated.

This maintenance release will activate the full functionality of the Auto Ticket creation for Generation tickets enhancement in eDART Prod.

For additional information please see the Auto Ticket Creation - Frequently Asked Questions.

Maintenance to Markets Gateway, Data Miner, SCED, and ASO in Prod. on October 22 from 2:50 p.m. - 5:00 p.m. EPT

10.22.2026 from 14:50 to 17:00

PJM will be performing system maintenance to Markets Gateway, Data Miner, Security Constrained Economic Dispatch (SCED), and Ancillary Services Optimizer (ASO) in the Production environment on Thursday, October 22, 2026, from 2:50 p.m. - 5:00 p.m. EPT (1450 - 1700 hours).

During this maintenance, there will be an outage of up to 45 minutes.

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

PJM may utilize manual economic dispatch for generation control.

​​​​​​​Impacted Tools

Markets Gateway

Data Miner

Security Constrained Economic Dispatch (SCED)

Ancillary Services Optimizer (ASO)

Maintenance to PJM Connect in Prod. and Train on October 22 from 5:00 p.m. - 8:00 p.m. EPT

10.22.2026 from 17:00 to 20:00

PJM will be performing system maintenance to PJM Connect in the Production and Train environments on Thursday, October 22, 2026, from 5:00 p.m. - 8:00 p.m. EPT (1700 - 2000 hours). During this maintenance, there will be intermittent outages of up to 03 hours.

Impacted Tool - PJM Connect​

Maintenance to PJM Connect in Prod. and Train on October 22 from 5:00 p.m. - 8:00 p.m. EPT

10.22.2026 from 17:00 to 20:00

PJM will be performing system maintenance to PJM Connect in the Production and Train environments on Thursday, October 22, 2026, from 5:00 p.m. - 8:00 p.m. EPT (1700 - 2000 hours). During this maintenance, there will be intermittent outages of up to 03 hours.

Impacted Tool - PJM Connect​