EngineeringFERC|March 5, 2026
FERC found PJM's tariff "unjust and unreasonable" for co-located data centers and ordered the nation's largest grid operator to create entirely new interconnection rules.
- Created two new transmission service types: Firm Contract Demand and Non-Firm Contract Demand for co-located loads
- Compliance filings were due Jan-Feb 2026; reply briefs due April 17, 2026
- Addresses the core tension: data centers want fast grid access, but utilities and regulators worry about reliability and cost-shifting
- PJM's market monitor separately urged FERC to rule that large data centers can only come online if reliability metrics are still met
- DOE has proposed rules requiring FERC to finalize large-load interconnection policy by April 30, 2026







