While both solar offset credits and RECs incentivize positive environmental impact, these instruments differ in some material ways: the owner of one carbon offset has the right to claim responsibility for removing or preventing one tonne of CO2 from entering the atmosphere the owner of one renewable energy credit (REC) has the right to claim responsibility for bringing 1 megawatt (MWh) of renewable energy onto the electrical grid. Since the purpose of these instruments differs, demand for them differs too. For sellers it is important to appreciate that one solar offset credit tends to trade at a higher value than one REC on an energy equivalent basis.