California
-Southern California Edison (ended 11/30/12)
-Southern California Gas
Connecticut
-United Illuminating
-Connecticut Light & Power Illinois
-Ameren (residential)
-Ameren (commercial)
Kentucky
-AEP Kentucky
-Duke Energy (residential)
Massachusetts
-Cape Light Compact
-MMWEC
-National Grid (electric)
-National Grid (gas)
-NSTAR Electric
-Unitil
-Western MA Electric
Missouri
-Ameren Missouri (electric)
-Ameren Missouri (gas)
New Hampshire
-Liberty Utilities (residential)
-Liberty Utilities (sm. business)
-NH Electric Cooperative (residential)
-NH Electric Cooperative (sm. business)
-Public Service of NH (residential)
-Public Service of NH (sm. business)
-Unitil (residential)
-Unitil (sm. business)
New Jersey
-NJ Clean Energy Program
-NJ Natural Gas
New Mexico
-PNM
New York
-LIPA
North Carolina
-Duke Energy (residential)
Ohio
-AEP Ohio
-American Municipal Power
-Columbia Gas of Ohio
-Duke Energy (residential)
Pennsylvania
-American Municipal Power
-Met-Ed
-Penelec
-Penn Power
Rhode Island
-National Grid (electric)
-National Grid (gas)
South Carolina
-Duke Energy (residential)
Vermont
-Efficiency Vermont
Washington
-Puget Sound Energy
West Virginia
-American Electric Power
-Appalachian Power

For a listing of our other online stores view efi.org/consumer/clients.