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

9.24.2026 15:45 to 1.6.2027 00:00

The Hudson path is restricted to 250MW 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.

Happening Today: Maintenance to Markets Gateway and Stale Data in Prod. on Sept. 25 from 3:00 p.m. - 5:00 p.m. EPT

9.25.2026 from 15:00 to 17:00

PJM will be performing system maintenance to Markets Gateway in the Production environment on Friday, September 25, 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 2 hours.

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

Impacted Tools

Markets Gateway

Hudson Scheduling Restriction

9.28.2026 00:01 to 9.30.2026 23:00

The Hudson path is restricted to 0MWs from Sep 28, 2026 00:01 until Sep 30, 2026 23:00 due to eDART tickets 1289787 and 1320649.

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

Temporary Changes to the Synchronized Reserve Requirements

9.28.2026 08:00 to 10.1.2026 16:00

PJM may carry additional Reserve MW effective hour ending 8 of September 28, 2026 through hour ending 16 of October 1, 2026 due to a temporary switching condition on the system. 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

Maintenance to Tools in Prod. and Train on Sept. 28 from 3:00 p.m. - 5:00 p.m. EPT

9.28.2026 from 15:00 to 17:00

PJM will be performing system maintenance in the Production and Train environments on Monday, September 28, 2026, from 3:00 p.m. - 5:00 p.m. EPT (1500-2000 hours). During this maintenance, there will be an outage of up to 5 minutes.

Impacted Tool

DER Directory (Production Only)

Cost Agent (Prod & Train)

Next Gen (Prod &Train)

Maintenance to Tools in Prod. and Train on Sept. 28 from 3:00 p.m. - 5:00 p.m. EPT

9.28.2026 from 15:00 to 17:00

PJM will be performing system maintenance in the Production and Train environments on Monday, September 28, 2026, from 3:00 p.m. - 5:00 p.m. EPT (1500-2000 hours). During this maintenance, there will be an outage of up to 5 minutes.

Impacted Tool

Cost Agent (Prod & Train)

Next Gen (Prod &Train)

Maintenance to eGADS in Prod. on Sep. 29 from 11:00 a.m. - Noon EPT

9.29.2026 from 11:00 to 12:00

PJM will be performing system maintenance in the Production environment on Tuesday, September 29, 2026, from 11:00 a.m. - Noon EPT (1100-1200 hours). During this maintenance, there will be an outage of up to 10 minutes.

Impacted Tool

eGADS

Maintenance to OASIS and ExSchedule in Prod. on Sept. 29 from 2:30 p.m. - 4:30 p.m. EPT

9.29.2026 from 14:30 to 16:30

PJM will be performing system maintenance in the Production environment on Tuesday, September 29, 2026, from 2:30 p.m. - 4:30 p.m. EPT (1430-1630 hours). During this maintenance, there will be an outage of up to 5 minutes.​​

Impacted Tools

ExSchedule

OASIS​​​​​​

Maintenance to Secure Share in Prod. on Sep. 29 from 4:00 p.m. - 8:00 p.m. EPT

9.29.2026 from 16:00 to 20:00

PJM will be performing system maintenance in the Production environment on Tuesday, September 29, 2026, from 4:00 p.m. - 8:00 p.m. EPT (1600-2000 hours). During this maintenance, there will be an outage of up to 1 hour.

​​Impacted Tool

Secure Share

Maintenance to Power Meter in Prod. and Train on September 29 from 4:30 p.m.-6:00 p.m. EPT

9.29.2026 from 16:30 to 18:00

PJM will be performing system maintenance in the Production and Train environments on Tuesday, September 29, 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 30 minutes.

Impacted Tool

Power Meter

Maintenance to Power Meter in Prod. and Train on September 29 from 4:30 p.m.-6:00 p.m. EPT

9.29.2026 from 16:30 to 18:00

PJM will be performing system maintenance in the Production and Train environments on Tuesday, September 29, 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 30 minutes.

Impacted Tool

Power Meter

Maintenance to one or more tools in the Prod. on Sep 30 from 4:30 p.m.- 6:00 p.m. EPT

9.30.2026 from 16:30 to 18:00

PJM will perform a system maintenance in the Production environment on Wednesday, September 30, 2026, from 4:30 - 6:00 p.m. EPT (1630 to 1800 hours). During this maintenance, there will be an outage of up to 30 minutes.

Impacted Tools

Cost Agent

Maintenance to eDART Production September 30, 2026, from 10:00 p.m. to 3:00 a.m. EPT

9.30.2026 22:00 to 10.1.2026 03:00

PJM will perform maintenance to eDART in the Production​​​ environment on Wednesday, September 30, 2026, from 10:00 p.m. to 3:00 a.m. EPT (2200 to 0300).

During the release there will be intermittent outages of up to 2 hours for certain portions of the eDART Production system and error messages may be generated. Stakeholders should review the Release Notes for details.