Chicago-area households are about to get a clearer picture of where energy-hungry data centers are connecting to the grid — but they will not get the added protection PJM had sought during power emergencies.

Here's what to know

According to Fox News, on Oct. 12, PJM Interconnection planned to activate a new "Large Load Registry." The grid operator, which oversees Chicago and a large swath of the Midwest and East Coast, will require utilities to identify single-site customers with exceptionally high electricity use, including factories and data centers.

With those reports, PJM hopes to spot major new sources of demand earlier instead of being surprised after the system is already under strain. The operator has said a surge in electricity-hungry data centers is a key reason the region could run into a supply crunch beginning in 2027.

The registry was only part of PJM's original proposal. It also sought tougher requirements for major new power users, including a rule that would have forced them to line up additional electricity or face being among the first customers curtailed during emergencies.

FERC rejected the most disputed parts of that broader plan, saying PJM had overreached by trying to shape how states and local utilities prioritize shutoffs and how rates would apply to those customers.

More background

For Illinois households, the outcome is mixed: PJM will gain better insight into where very large new electric loads are being added, but residents lose a proposed protection that could have put data centers ahead of homes in line during emergency shutoffs.

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If supplies tighten, PJM still cannot cut power to data centers and other major new users before homes, hospitals, or schools. The power to make that decision remains with state officials and local utilities.

In comments to Utility Dive, FERC Commissioner David Rosner said noncritical data centers should be shut off before ordinary customers during an emergency, Fox News reported. At the same time, he said state regulators should write those rules, underscoring a wider debate over who should be protected first as electricity demand climbs quickly.

What can be done?

The clearest change that is still happening is the registry itself. PJM should get earlier notice about new factories or data centers that could add stress before the 2027 crunch it has warned about.

Households can also focus on the part of the energy equation they control most directly: home efficiency. In the second half of this transition, many residents will be looking for ways to lower their own bills, and the Palmetto Comfort Plan includes $0-down options that can lower heating and cooling costs by up to 50%. Palmetto Comfort Plans also include 12 years of free maintenance, which can make an efficient HVAC or heat pump upgrade easier to manage over time.

To achieve the same goal, homeowners can pair solar panels with electric appliances, including efficient HVAC systems, to push utility costs even lower. EnergySage makes it easy to compare solar options and find the best solar system and installer for a home's budget, and it can help homeowners save up to $10,000 on solar installations.

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