Renewable Energy Certificates

The Connecticut Light and Power Company and The United Illuminating Company (the Companies) are issuing a joint Request for Information (RFI) to support the development of the “Low and Zero Emissions Renewable Energy Credit Program” (the Program) pursuant to Sections 107, 108, and 110 of Public Act 11-80, An Act Concerning the Establishment of the Department of Energy and Environmental Protection and Planning for Connecticut’s Energy Future.

Prior to finalizing the Program, the Companies are issuing this RFI to inform customers and developers of projects that may qualify for ZRECs and LRECs of the upcoming solicitations, to obtain feedback on the Program, and to pose a number of questions for consideration by customers and the developer community. 


The RFI can be viewed at




Companies, institutions and homeowners can support clean energy by purchasing renewable energy certificates (also known as RECs, renewable energy credits, green tags, green energy certificates, or tradable renewable certificates). RECs are tradable commodities that prove 1 megawatt-hour of electricity was generated from a renewable energy source. A megawatt-hour equals 1,000 kilowatt-hours, and the average residential customer consumes about 800 kilowatt-hours a month.


RECs are bought and sold in order to provide a subsidy to encourage the development and use of renewable energy sources. For instance, a wind farm will earn RECs for the electricity it produces and can then sell those RECs on the open market.


Purchasing RECs allows companies and institutions to help the environment and at the same time help their organizations by demonstrating to others that they are environmental stewards and leaders in sustainability in their communities. 


A list of REC suppliers may be accessed through the federal Environmental Protection Agency (EPA):


A list of Connecticut organizations that are buying RECs may be accessed through the EPA: