ComEd - Wind & Photovoltaic Generation Program

April 01, 2008


In April 2000, Commonwealth Edison (ComEd), an investor-owned utility serving Chicago and surrounding areas, established a net-metering program for photovoltaic (PV) and wind-energy systems up to 40 kW. The program is available to all customer classes. The total installed capacity of all net-metered systems is limited to 0.1% of the utility's annual peak demand. ComEd installs a special dual-register meter for net-metered systems. ComEd pays customer-generators, on a monthly basis, the utility's avoided costs for any net excess generation (NEG). In addition, in order to simulate the economics of net metering, ComEd makes an additional annual payment for the customer's total excess power added to ComEd's system during the year (up to the amount of power the customer took from ComEd during the year). Customers are paid at a rate representing the difference between the average avoided cost paid to the customer for NEG and the average retail rate paid by the customer for retail purchases during the year.

Program Overview

Implementing Sector: Utility
Category: Regulatory Policy
State: Illinois
Incentive Type: Net Metering
Web Site:
Start Date:
Eligible Renewable/Other Technologies:
  • Solar Photovoltaics
  • Wind (All)
  • Wind (Small)
Applicable Utilities: 40 kW
System Capacity Limit: 0.1% of annual peak demand
Aggregate Capacity Limit: Purchased monthly at utility's avoided-cost rate, plus an annual incentive payment
Net Excess Generation: ComEd
Ownership of Renewable Energy Credits: Yes


Name: Maryl Freestone
Organization: Exelon Corporation
Address: ESO Tech. Services, 2nd Fl
Oakbrook Terrace IL 60181-4260
Phone: (800) 825-5436

This information is sourced from DSIRE; the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University.