One renewable energy certificate (REC) represents 1,000 kilowatt-hours of renewable energy delivered to the power grid. To put that in perspective, the average Alameda home uses 331 kilowatt-hours a month. The purchase of RECs helps support production of new renewable energy technologies. All of our RECs are certified by the Environmental Protection Agency's preferred third party, Green-e®. To watch a video about RECs, click here.