Renewable Energy Certificate (REC) have become increasingly popular in recent years as the demand for clean and sustainable energy sources continues to grow. REC is a market-based instrument that represents the property rights to the environmental, social, and other non-power attributes of renewable electricity generation. When one megawatt-hour (MWh) of electricity is generated and delivered to the electricity grid from a renewable energy resource, a REC is issued to certify the ownership of that renewable energy.