America’s largest power grid, managed by PJM Interconnection and covering 13 states from Illinois to Tennessee, is facing significant strain as data centers and AI chatbots rapidly increase electricity consumption—outpacing the grid’s ability to build new power plants. This has led to sharp electricity price increases, with bills projected to rise over 20% this summer in some areas.
The rising costs stem from an 800% jump in prices at PJM’s annual capacity auction last year, which sets rates to ensure electricity availability during extreme weather. These price hikes trickle down to consumers and have sparked political and organizational upheaval: Pennsylvania’s governor has threatened to pull the state from PJM, the grid’s CEO announced he will step down, and key board members have been replaced.
The auction is scheduled again soon, with expectations of further price rises, driven by a growing mismatch between supply and demand. Aging power plants are retiring faster than new ones come online, and PJM has delayed auctions and paused accepting applications for new power plants—actions that experts say exacerbate the shortage.
Pennsylvania Governor Josh Shapiro emphasized the need for transparency, speed, and cost control from PJM. The grid operator attributes the supply crunch partly to external factors, such as state policies that closed fossil fuel plants prematurely and soaring demand from data centers, especially in “Data Center Alley” in Northern Virginia.
Although PJM has cleared about 46 gigawatts of new power projects in recent years—enough for 40 million homes—many face delays due to local opposition, supply chain issues, and financing problems. PJM lost more than 5.6 gigawatts of power capacity in the last decade and added only about 5 gigawatts in 2024, less than smaller grids in California and Texas.
Demand from data centers alone is expected to increase by 32 gigawatts by 2030, with AI-related workloads significantly contributing to the surge.
The power crunch intensified after PJM paused processing new power plant applications in 2022, overwhelmed by renewable project requests, and after AI chatbots like ChatGPT gained popularity in 2023, boosting data center energy use. Consumer groups have called for a redo of the 2024 capacity auction, citing unfairly high prices.
In response, PJM implemented reforms including price caps and biannual auctions, and expedited the connection of 51 power projects, but many will not be operational until 2030 or later. For example, the Three Mile Island nuclear plant restart, contracted by Microsoft, won’t come online before 2027.
Experts warn that PJM must improve its processing of new power plant applications to effectively address the supply-demand imbalance and prevent blackouts.