PJM will be performing system maintenance in the Production environment on August 25, 2026, from 4:00 p.m. - 9:00 a.m., August 26.

During this maintenance, there may be intermittent unavailability.

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Generation Deactivations

Generator deactivations can alter power flows that may yield violations of established transmission system reliability criteria. Therefore system upgrades may be required to correct any identified reliability violation, in many areas of PJM. Visit the Learning Center site to learn about the steps PJM takes to keep the grid stable when power plants retire.

Deactivated Generators include:

  • Retired - inactive and not expected to return to service
  • Mothballed - inactive for a defined period and expected to return to service

Deactivated Generators currently mothballed XLS

The list of deactivations is typically updated within 24 business hours of notification from the generator. If a deactivation is not shown, PJM has not been notified of the deactivation.

Generator Deactivation Notices