The Renewable Electricity Production Tax Credit (PTC) is a tax credit available for businesses that generate electricity from qualified renewable energy sources, such as wind, closed-loop biomass, open-loop biomass, geothermal, solar, small irrigation power, municipal solid waste, qualified hydropower, and marine and hydrokinetic energy. The credit amount is calculated based on the amount of electricity produced and sold by the taxpayer to an unrelated person during the taxable year. The credit rate is adjusted annually for inflation and varies depending on the type of renewable energy source. This credit aims to incentivize the production of renewable energy and promote a transition towards cleaner and more sustainable energy sources. For more details, refer to 26 U.S. Code § 45.