Data Center Energy Procurement in Illinois

Data centers are among the largest and most distinctive commercial electricity accounts in Illinois: enormous, near-constant load with a very high load factor. Northern Illinois — the Elk Grove Village and I-88/Aurora/DeKalb corridors, largely in ComEd territory — has a growing footprint. For these facilities, procurement and capacity strategy are high-stakes.

Who this is for

Facility, engineering, and finance leaders at Illinois data centers and large computing facilities, and developers evaluating an Illinois site's energy profile.

The data center load profile

• Very high, very steady load. IT and cooling run continuously, producing a high load factor that can be favorable for supply pricing.
• Large, persistent capacity obligation. Because the facility runs near-flat, its capacity tag (PLC) in the ComEd/PJM zone is large and continuous, making capacity a major, ongoing cost component.
• Scale magnifies contract terms. At this size, pricing scope, pass-throughs, and volume terms have outsized dollar impact — small per-kWh differences are large absolute numbers.

Why capacity and contract structure dominate

For a near-flat load this large, the supply rate, capacity treatment, and contract terms all matter enormously. A PJM auction clearing price is not a bill rate — capacity cost is filtered through delivery year, PLC, and the contract — so understanding those mechanics is central, not incidental. See commercial demand charges and the PJM capacity guide.

Getting started

Provide interval data and 12–24 months of bills for the facility (or projected load for a development), confirm the serving utility, and the account can be analyzed and priced on matched terms through the procurement process. No savings figure is promised in advance.