For each of the past eleven years, EPRI’s research program on Integrated Energy System Planning Methods and Analysis (Project Set 178B), in conjunction with member electric companies, has developed different scenarios of potential future technology, regulatory, and market conditions that may exist in the United States in the coming decades, and analyzed how the electric sector might evolve under these scenarios. This presentation, and the accompanying Excel spreadsheet datasets, highlight the analysis and results from the 2023 REGEN Scenarios Analysis Project. In 2023, the research focused on understanding the U.S. electric sector’s role in economy-wide changes for a low carbon transition. Eighteen scenarios of varying emissions policies, other policies, and future cost projections are analyzed. The scenarios explore three potential emissions policies: a business-as-usual, a net-zero CO2 electric sector by 2035, and economywide decarbonization by 2050. Each of these the emissions policies are analyzed with and without the Inflation Reduction Act (IRA), with various cost projections, and with constrained transmission and increased interconnection costs. Results focus on the generation buildout by scenario and how the electric sector interacts with the broader economy to meet climate policy targets.