Alaska

• Golden Valley Electric Association

California

• Anaheim Public Utilities
• Burbank Water & Power
• BEST Business Energy Services Team
• Energy Smart Grocer
• Los Angeles Department of Water & Power
• Modesto Irrigation District Water & Power
• PGE Pacific Gas & Electric
• Pacific Power
• Right Lights
• Riverside Public Utilities
• Roseville Electric
• Redding Electric Utility
• San Diego Gas & Electric
• Silicon Valley Power
• Southern California Edison 

Colorado

• Aquila Incorporated
• City of Longmont
• CORE Community Office for Resource Efficiency
• Excel Energy
• Platte River Power Authority

• Connecticut Light & Power

• Florida Power & Light Company 
• Tampa Electric
  

• HECO Hawaiian Electric Company

Idaho

• Advista Utilities
• Idaho Power

• CWLP City Water Light & Power

• Cinergy
  

• Iowa Association of Municipal Utilities
• Linn County Rural Electric Co-op
• Alliant Energy
• Mid American Energy

• Bangor Hydro Electric Company
• Efficiency Maine

• Massachusetts Electric
• WMECO Western Massachussets Electric
• NSTAR Boston Edison
• Unitil / Fitchburg Gas & Electric Light Company

Minnesota

• Alexandria Light & Power
• Marshall Municipal Utilities
• Minnesota Power
• Alliant Energy
• Otter Tail Power Company
• Xcel Energy

Missouri

• Kansas City Power & Light

• Flathead Electric Co-op
• Northwestern Energy

• Sierra Pacific Power
• Nevada Power
  

• Granite State Electric
• New Hampshire Electric Co-op
• Public Service of New Hampshire

New Jersey

• New Jersey Board of Public Utilities
• PSEG
• Rockland Electric Company

New York

• LIPA Long Island Power Authority
• NYSERDA

Oregon

• Energy Trust of Oregon
• Portland General Electric

Rhode Island

• Narragansett Electric

South Dakota

• Black Hills Power

Texas

• Austin energy
• Entergy Texas
• Relliant Energy

Utah

• Utah Power - PacifiCorp

Vermont

• CVPS Central Vermont Public Service
• Efficiency Vermont

Washington

• Avista Utitlities
• Pacific Power
• PUD of Challam County
• Puget Sound Energy
• Seattle City Light
• Snohomish County PUD
• Tacoma Power

Wisconsin

• Barron Electric
• Focus On Energy
• Jackson Electric Cooperative

Wyoming

• Black Hills Power
• Pacific Power

• Office of Energy Efficiency
• Aquila Networks