Wholesale power prices on the largest electric grid in the US surged by 76% in Q1, driven by soaring demand from data centers and intensifying pressure on grid operators to protect consumers from rising costs.
The total cost of wholesale power on the PJM Interconnection averaged $136.53 per megawatt-hour (MWh) in Q1, up from $77.78 per MWh in Q1 2025, an increase of $58.75 per MWh.
Monitoring Analytics said energy costs accounted for the largest share of the increase, rising $42.90 per MWh, or 78.5%. Capacity costs climbed $14.21 per MWh, a 398.1% jump, while transmission costs increased by $0.94 per MWh, or 5.3%.
Data centers require vast amounts of electricity, creating a new and consistent burden on regional power supplies.
Energy, capacity, and transmission were the three largest components of total wholesale power costs on the PJM Interconnection, accounting for 98.3% of the total in Q1. Energy made up 71.5% of the total cost, capacity 13.0%, and transmission 13.8%.
The Monitoring Analytics report also showed shifts in generation mix compared with Q1 2025. Coal-fired generation declined 1.7%, while natural gas generation rose 4.2%. Oil-fired generation increased sharply by 43.2%. Renewable output was mixed, with wind generation falling 4.7% and solar generation rising 15.0%.
The increase in wholesale costs comes amid ongoing debates over supply adequacy, rising demand from data centers and electrification trends, and the impact of changing generation patterns on grid reliability and pricing.
PJM Interconnection operates the largest wholesale electricity market in the US, spanning 13 states and serving millions of customers.