FERC rejects PJM's Interim Resource Adequacy Service for large loads on Oct. 9, approves registry
On Oct. 9, 2026, FERC rejected most of PJM's plan for connecting data centers and other large loads, including the Interim Resource Adequacy Service (IRAS) and "bring your own new capacity" rules. FERC said IRAS provisions appear to intrude on state jurisdiction over retail rates and to discriminate against large loads. FERC approved PJM's definition of large loads and a large load registry that would record a facility's location, ramp schedule and capacity supply.
Why it matters
Developers planning data centers in PJM territory should expect curtailment priorities to be set by state regulators rather than through a PJM-wide interim service, and should plan for continued uncertainty in interconnection rules and capacity prices.
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