The U.S. power grid nearly doubles in capacity from 2022 to 2050 to meet increasing demand for electric power, and most newly built capacity will be from renewable energy technologies, according to most cases in our Annual Energy Outlook 2023 (AEO2023). Declining capital costs for solar panels, wind turbines, and battery storage, as well as government subsidies such as those included in the Inflation Reduction Act (IRA), result in renewables becoming increasingly cost effective compared with the alternatives when building new power capacity. Economic growth, paired with rising electrification in end-use sectors, results in stable growth in U.S. electric power demand through 2050.