PJM’s latest reliability warning puts data-center transfers and migration plans under closer scrutiny.

PJM’s October 22 update from the Federal Energy Regulatory Commission’s October 21 reliability conference describes a planning problem that reaches beyond new construction: large data-center loads can draw power almost continuously, making spring and fall maintenance periods harder to manage and complicating backup-power coordination.

PJM reported that approximately 3,900 MW of large loads unexpectedly transferred to backup generation on July 22 after routine transmission events, producing concerning voltage fluctuations. PJM says it is developing voltage- and frequency-ride-through requirements and participating in North American Electric Reliability Corporation standards work for large computational loads. That work is ongoing; it is not a newly effective universal requirement for every facility.

FRG operational interpretation, not an enacted requirement: treat power readiness as a transition gate. Before a facility exit, workload migration, or lease handback, coordinate removal dates with verified readiness at the receiving site and in the operation that remains online.

Confirm capacity and commissioning milestones. Identify who owns UPS, generator, and protection-setting decisions and what engineering or utility coordination is required. Identify the systems that must remain available through the migration, and retain test, equipment, and handover records before disposition. A lease deadline does not establish electrical readiness, and available backup equipment does not establish permission to operate it in every circumstance.

For transitions involving critical-power assets, resolve those dependencies before treating recovery value or removal dates as firm. Site-specific service agreements, tariffs, permits, engineering requirements, and utility direction still control.