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.

Maintenance to Markets Gateway in Prod. on Aug. 26 from 3:00 p.m. - 6:00 p.m. EPT

8.26.2026 from 15:00 to 18:00

PJM will be performing system maintenance to Markets Gateway in the Production environment on Wednesday, August 26, 2026, from 3:00 p.m. - 6:00 p.m. EPT (1500-1800 hours).

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

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

​​​​​​​Impacted Tool

Markets Gateway​​​​​​

Maintenance to NextGen in Prod. and Train on Aug. 27 from 10:00 a.m. - Noon EPT

8.27.2026 from 10:00 to 12:00

PJM will be performing maintenance in the Production and Train environments on Thursday, August 27, 2026, from 10:00 a.m. - Noon EPT (1000 - 1200 hours).

During this maintenance, users may see page expiration errors and would need to log out and log back in to resolve.

Impacted Tool:

NextGen

Maintenance to NextGen in Prod. and Train on Aug. 27 from 10:00 a.m. - Noon EPT

8.27.2026 from 10:00 to 12:00

PJM will be performing maintenance in the Production and Train environments on Thursday, August 27, 2026, from 10:00 a.m. - Noon EPT (1000 - 1200 hours).

During this maintenance, users may see page expiration errors and would need to log out and log back in to resolve.

Impacted Tool:

NextGen

Maintenance to Queue Point in Prod. and Train on Aug. 27 from 11:00 a.m. - Noon EPT

8.27.2026 from 11:00 to 12:00

PJM will be performing system maintenance in the Production and Train environments

on Thursday, August 27, 2026, from 11:00 a.m. - Noon EPT (1100-1200 hours). During this maintenance, there will be an outage of up to 5 minutes.

Impacted Tool

Planning Center: Queue Point

Maintenance to Queue Point in Prod. and Train on Aug. 27 from 11:00 a.m. - Noon EPT

8.27.2026 from 11:00 to 12:00

PJM will be performing system maintenance in the Production and Train environments

on Thursday, August 27, 2026, from 11:00 a.m. - Noon EPT (1100-1200 hours). During this maintenance, there will be an outage of up to 5 minutes.

Impacted Tool

Planning Center: Queue Point

Maintenance to Markets Gateway in Train on Aug.27 from 1:00 p.m. - 3:00 p.m. EPT

8.27.2026 from 13:00 to 15:00

PJM will be performing system maintenance in the Train environment on Thursday, August 27, 2026, from 1:00 p.m. - 3:00 p.m. EPT (1300-1500 hours). During this maintenance, there will be an outage of up to 30 minutes.

Impacted Tool

Markets Gateway

Maintenance to Markets Gateway, Data Miner, SCED, and ASO in Prod. on Aug. 27 from 2:50 p.m. - 5:00 p.m. EPT

8.27.2026 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, August 27, 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 30 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 InSchedule in Prod. and Train on Aug. 27 from 4:30 p.m. - 6:00 p.m. EPT

8.27.2026 from 16:30 to 18:00

PJM will be performing system maintenance in the Production and Train environments on Thursday, August 27, 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: InSchedule

Maintenance to InSchedule in Prod. and Train on Aug. 27 from 4:30 p.m. - 6:00 p.m. EPT

8.27.2026 from 16:30 to 18:00

PJM will be performing system maintenance in the Production and Train environments on Thursday, August 27, 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: InSchedule

Maintenance to Voting in Prod. and Train on Aug. 27 from 5:00 p.m. - 8:00 p.m. EPT

8.27.2026 from 17:00 to 20:00

PJM will be performing system maintenance to Voting in the Production and Train environments on Thursday, August 27, 2026, from 5:00 p.m. - 8:00 p.m. EPT (1700-2000 hours). During this maintenance, there will be an outage of up to 30 minutes.

Impacted Tool

Voting

Maintenance to Voting in Prod. and Train on Aug. 27 from 5:00 p.m. - 8:00 p.m. EPT

8.27.2026 from 17:00 to 20:00

PJM will be performing system maintenance to Voting in the Production and Train environments on Thursday, August 27, 2026, from 5:00 p.m. - 8:00 p.m. EPT (1700-2000 hours). During this maintenance, there will be an outage of up to 30 minutes.

Impacted Tool

Voting

Happening Today: Maintenance to DR Hub in Prod. and Train on Aug. 28 from 1:00 p.m. - 3:00 p.m. EPT

Today from 13:00 to 15:00

PJM will be performing a system maintenance in the Production and Train environments TODAY, on Friday, August 28, 2026, from 1:00 p.m. - 3:00 p.m. EPT (1300-1500 hours).

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

Impacted tool

DR Hub

Happening Today: Maintenance to DR Hub in Prod. and Train on Aug. 28 from 1:00 p.m. - 3:00 p.m. EPT

8.28.2026 13:00 to 8.29.2026 15:00

PJM will be performing a system maintenance in the Production and Train environments TODAY, on Friday, August 28, 2026, from 1:00 p.m. - 3:00 p.m. EPT (1300-1500 hours).

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

Impacted tool

DR Hub

Maintenance to tools in Train Environment on Sep. 1 from 10 a.m.-Noon EPT

9.1.2026 from 10:00 to 12:00

PJM will be performing system maintenance in the Train environment on Tuesday, September 1, 2026 from 10:00 a.m.-Noon EPT (1000-1200 hours). During this maintenance, there will be an outage of up to 30 minutes.

Impacted Tool

eGADS