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Power Grid Watchdog Warns AI Data Centers Are Straining Supply
PJM forecasts an electricity reserve shortfall starting June 2027 due to retiring plants and surging AI data center demand, risking grid reliability across its 13-state region.
Earlier this month, PJM Interconnection said electric supplies will fall short of the 'reserve margin' from June 2027 to May 2028 and urged data centers to bring their own generation.
Old plants retiring and slow interconnections mean PJM Interconnection faces supply shortfalls amid extraordinary demand from data centers built to support artificial intelligence.
In practice, utilities phone AWS to shed 1,000 MW, and AWS can pause roughly 30% of data-center operations, which can consume 100–500 MW and provide gigawatt-scale curtailment.
As a consequence, state regulators and utility commissions may require data centers to generate power or disconnect during emergencies, while questioning why ratepayers should subsidize hyperscalers' reliability amid rising costs and emergency payments.
Experts recommend utilities and regulators exclude data-center demand response from planning reserve margins, build more generation and storage, and enforce capacity-credit agreements with 75% participation floors to avoid a dependency trap.