Generally, RECs (Renewable Energy Certificates) are tradable, contractual instruments that represent the full suite of attributes of 1 Megawatt-hour of renewable energy generation on the electricity grid. RECs are the sole means to claim usage of grid-connected renewable electricity in the United States, and the compliance instrument for consumption- or delivery-based state Renewable Portfolio Standards. Renewable electricity generation and use are tracked through RECs, and so by matching RECs with your electricity service you are using renewable electricity. A REC represents the environmental benefits of 1 megawatt-hour of renewable electricity that can be paired with electricity For more information on RECs please see this video.
* Disclaimer: Please note that the above information regarding RECs is not state specific. Each state has its own REC requirements. The REC programs utilized by Kiwi Energy to match energy consumption and offset gas consumption go above and beyond those legal requirements in each individual state.