US Power Grid Redesign Urgent as AI Data Centres Strain System
Electricity bills are projected to surge by more than 20% this summer in parts of PJM Interconnection’s territory. The grid spans 13 states, from Illinois to Tennessee and Virginia to New Jersey, and serves about 67 million customers. The region also hosts the largest concentration of data centres in the world.
The cost data is striking. Data centres connected to the grid have added $6.5 billion to the cost of procuring power supplies.
After a December auction, total costs tied to data centres reached $23.1 billion for June 2025 through May 2028. These fast-growing users account for 49% of the total $47.2 billion cost across three consecutive auctions.
The Scale of What PJM Is Proposing
PJM Interconnection plans to add 15 gigawatts of new power supply under an emergency proposal to address expected shortages driven by artificial intelligence growth. The grid operator for the 13-state eastern US region plans to match proposed data centres with new power plants.
Developers have responded strongly. PJM received more than 800 applications for new generation projects under its updated interconnection process. The pipeline includes 349 battery storage projects, 157 natural gas plants, 142 solar farms, and 65 wind farms.
“We are encouraged by the diversity of generation types seeking to join the PJM generation fleet,” said David Mills, PJM’s president and CEO. “This is good news because we need all the generation we can get.”
Political pressure is also rising. Pennsylvania Governor Josh Shapiro warned that if PJM does not seriously reform itself, Pennsylvania may act independently.
Federal officials have already stepped in. The Trump administration ordered two oil and natural gas plants in Pennsylvania to remain online through the summer, even though they were scheduled to retire in May, due to blackout risks.
Analysts say coordinated action during peak stress periods could avoid $40 billion to $150 billion in capital investments over the next decade. That would reduce costs for households and small businesses tied to grid expansion for data centres.
The US power grid redesign for AI data centres has moved beyond energy planning into national security concerns. The push to scale AI is now colliding with the limits of existing power infrastructure.
