March 30, 2026
ComEd Substation Map: Where Battery Storage Projects Are Being Built in Illinois
An interactive map of ComEd substations in northern Illinois showing where battery energy storage projects are viable. Find substations near your property.
Battery energy storage projects connect to the power grid at substations — the transformer facilities that step voltage up or down between transmission lines and local distribution. Knowing where substations are, and which ones have available capacity, is the key to determining whether your land qualifies for a lease.
The ComEd service territory
ComEd (Commonwealth Edison) operates the electrical grid across northern Illinois, serving approximately 4 million customers. The service territory spans from the Wisconsin border south to Kankakee and from the Indiana border west to the Quad Cities.
Within this territory, there are approximately 500+ substations ranging from small 69 kV distribution substations to major 345 kV transmission hubs.
Where battery projects are concentrating
Based on the PJM interconnection queue and current developer activity, battery storage projects are clustering around substations in these areas:
- I-80 corridor (LaSalle, Grundy, Kendall counties) — Major transmission infrastructure running east-west
- I-39 corridor (Lee, Bureau, Marshall counties) — North-south transmission with rural land availability
- Bloomington-Normal area (McLean County) — Multiple 345 kV substations with large capacity
- Peoria metro (Peoria, Woodford counties) — Dense substation network with available capacity
- Rockford area (Winnebago, Stephenson, Ogle counties) — Growing interconnection activity
What makes a substation viable for battery storage?
Not every substation can support a battery project. The key factors are:
- Voltage level: 69 kV and above is generally required for projects over 2 MW
- Available capacity: The substation must have room for additional generation/storage
- Queue depth: How many other projects are already waiting to connect
- Feeder infrastructure: The distribution lines connecting the substation to the grid
Explore substations near you
Use the interactive map on our homepage to explore substations in the ComEd territory. Click any substation to see estimated project capacity and potential earnings.
To find out specifically whether your property is near a viable substation, request a free site evaluation.
Frequently asked questions
How many ComEd substations are in northern Illinois?
There are approximately 500+ substations in the ComEd service territory across northern Illinois. These range from small 69 kV distribution substations to major 345 kV transmission hubs. Not all have available capacity for new battery storage projects.
How close does my land need to be to a substation?
Generally, the closer the better — properties within 2-5 miles of a substation with available capacity are the most viable. The exact distance depends on the existing distribution infrastructure (three-phase power lines) connecting your area to the substation.