PJM’s big new data center plan: Make the states figure it out

The regional grid operator PJM, which manages power supply across 13 states from Illinois to Virginia, has proposed a plan to keep massive data centers from driving up everyone else's electric bills. Data centers use huge amounts of power, and PJM expects them to add 30 to 34 gigawatts of demand by the early 2030s. Building enough power plants to meet that growth would otherwise get passed on to regular utility customers.

Under the new plan, PJM would require large power users — data centers of at least 50 megawatts — to either line up their own power supply (new solar, wind, batteries, or backup generation) or risk being cut off from the grid first during emergencies, starting in 2027. But PJM can't tell individual utilities which customers to cut off — that's a state decision. So the plan leans on states and utilities to actually enforce this, through tools like "large load tariffs" that tie a data center's costs to its own grid impact. Some states, including Illinois, are considering laws requiring data centers to pay for clean power to match what they use. Consumer advocates say most states aren't ready to put these rules in place yet.

The plan still needs approval from federal regulators. For homeowners, the bigger picture is this: rising electricity prices in this region have been tied partly to data center growth, and how well your state follows through on these rules could affect whether that cost pressure eases or continues to show up on your utility bill.