The utilities and energy efficiency providers listed below work with EFI to make energy efficiency-related products available to their qualifying customers. In most cases eligibility restrictions and purchase and/or delivery restrictions apply, and in some cases qualifying customers must be validated prior to viewing the site. Clicking on the utility name will open a new window with the offer.
| Arkansas | |
| SWEPCO | Eligibility: residential electric Products: energy efficient lighting |
| California | |
| City of Colton Electric Utility | Eligibility: residential electric Products: energy efficient lighting, plug load controls, and smart thermostats |
| Southern California Gas | Eligibility: residential natural gas Products: hot water-saving showerheads |
| Pacific Power | Eligibility: residential electric Products: energy efficient lighting and hot water-saving devices |
| Pasadena Water and Power | Eligibility: residential electric Products: energy efficient lighting and hot water-saving devices |
| Connecticut | |
| Eversource | Eligibility: residential electric Products: energy efficient lighting |
| United Illuminating | Eligibility: residential electric Products: energy efficient lighting |
| Idaho | |
| Rocky Mountain Power | Eligibility: residential electric Products: energy efficient lighting and hot water-saving devices (suspended) |
| Illinois | |
| Ameren Illinois | Eligibility: non-residential electric Products: energy efficient lighting and controls |
| Indiana | |
| Duke Energy | Eligibility: residential electric Products: energy efficient lighting |
| Duke Energy | Eligibility: non-residential electric Products: energy efficient lighting, controls, and hot water-saving devices |
| Kentucky | |
| Duke Energy | Eligibility: residential electric Products: energy efficient lighting |
| Duke Energy | Eligibility: non-residential electric Products: energy efficient lighting, controls, and hot water-saving devices |
| Maryland | |
| Potomac Edison | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Massachusetts | |
| Berkshire Gas | Eligibility: residential with natural gas space heating Products: smart thermostats |
| Blackstone Gas | Eligibility: residential with natural gas space heating Products: smart thermostats |
| Cape Light Compact | Eligibility: residential electric Products: energy efficient lighting, plug load controls, and hot water-saving showerheads |
| Cape Light Compact | Eligibility: residential with electric, oil, or propane space heating Products: smart thermostats |
| Columbia Gas of MA | Eligibility: residential with natural gas space heating Products: smart thermostats |
| Eversource | Eligibility: residential electric Products: energy efficient lighting, plug load controls, and hot water-saving showerheads |
| Eversource | Eligibility: residential with electric, oil, or propane space heating Products: smart thermostats |
| Eversource | Eligibility: residential with natural gas space heating Products: smart thermostats |
| Hudson Light and Power | Eligibility: residential electric Products: energy efficient lighting and plug load controls |
| Liberty Utilities | Eligibility: residential with natural gas space heating Products: smart thermostats |
| National Grid | Eligibility: residential electric Products: energy efficient lighting, plug load controls, and hot water-saving showerheads |
| National Grid | Eligibility: residential with electric, oil, or propane space heating Products: smart thermostats |
| National Grid | Eligibility: residential with natural gas space heating Products: smart thermostats |
| Reading Municipal Light Department | Eligibility: residential electric Products: energy efficient lighting and plug load controls |
| Unitil | Eligibility: residential electric Products: energy efficient lighting, plug load controls, and hot water-saving showerheads |
| Unitil | Eligibility: residential with electric, oil, or propane space heating Products: smart thermostats |
| Unitil | Eligibility: residential with natural gas space heating Products: smart thermostats |
| Missouri | |
| Ameren Missouri | Eligibility: residential natural gas Products: hot water-saving devices |
| New Hampshire | |
| Eversource | Eligibility: residential electric Products: energy efficient lighting |
| Liberty Utilities | Eligibility: residential electric Products: energy efficient lighting |
| New Hampshire Electric Cooperative | Eligibility: residential electric Products: energy efficient lighting |
| Unitil | Eligibility: residential electric Products: energy efficient lighting |
| New Jersey | |
| FirstEnergy | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Jersey Central Power & Light | Eligibility: all customers Products: wide variety of energy efficient technologies |
| New Mexico | |
| PNM | Eligibility: residential electric Products: energy efficient lighting |
| New York | |
| PSEG Long Island | Eligibility: residential electric Products: energy efficient lighting |
| North Carolina | |
| Duke Energy | Eligibility: residential electric Products: energy efficient lighting |
| Duke Energy | Eligibility: non-residential electric Products: energy efficient lighting, controls, and hot water-saving devices |
| EnergyUnited | Eligibility: residential electric Products: energy efficient lighting, controls, hot water-saving devices, and weatherization products |
| Ohio | |
| AEP Ohio | Eligibility: residential electric Products: energy efficient lighting |
| Columbia Gas of Ohio | Eligibility: residential natural gas Products: programmable thermostats, smart thermostats, and hot water-saving devices |
| Dayton Power and Light | Eligibility: residential electric Products: energy efficient lighting |
| Duke Energy | Eligibility: residential electric Products: energy efficient lighting |
| Duke Energy | Eligibility: non-residential electric Products: energy efficient lighting |
| Efficiency Smart | Eligibility: residential electric Products: energy efficient lighting |
| FirstEnergy | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Ohio Edison | Eligibility: all customers Products: wide variety of energy efficient technologies |
| The Illuminating Company | Eligibility: all customers Products: wide variety of energy efficient technologies |
| ToledoEdison | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Oklahoma | |
| Public Service of Oklahoma | Eligibility: residential electric with smart meters Products: smart thermostats |
| Pennsylvania | |
| American Municipal Power | Eligibility: residential electric Products: energy efficient lighting |
| Efficiency Smart | Eligibility: residential electric Products: energy efficient lighting |
| FirstEnergy | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Met-Ed | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Penelec | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Penn Power | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Rhode Island | |
| National Grid | Eligibility: residential electric Products: energy efficient lighting and plug load controls |
| South Carolina | |
| Duke Energy | Eligibility: residential electric Products: energy efficient lighting |
| Duke Energy | Eligibility: non-residential electric Products: energy efficient lighting, controls, and hot water-saving devices |
| EnergyUnited | Eligibility: residential electric Products: energy efficient lighting, controls, hot water-saving devices, and weatherization products |
| SCE&G | Eligibility: residential electric Products: energy efficient lighting |
| Texas | |
| TXU Energy | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Utah | |
| Rocky Mountain Power | Eligibility: residential electric Products: energy efficient lighting and hot water-saving devices |
| Vermont | |
| Efficiency Vermont | Eligibility: residential electric (statewide) Products: energy efficient lighting and plug load controls |
| Washington | |
| Pacific Power | Eligibility: residential electric Products: energy efficient lighting and hot water-saving devices |
| West Virginia | |
| American Electric Power | Eligibility: residential electric Products: energy efficient lighting |
| Appalachian Power | Eligibility: residential electric Products: energy efficient lighting |
| FirstEnergy | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Mon Power | Eligibility: all customers Products: wide variety of energy efficient technologies |
| Wisconsin | |
| Focus On Energy | Eligibility: residential electric (statewide) Products: energy efficient lighting and hot water-saving devices |
| Wyoming | |
| Rocky Mountain Power | Eligibility: residential electric Products: energy efficient lighting and hot water-saving devices |