The Supercritical Transformational Electric Power (STEP) Demo pilot plant — a $169 million, 10-megawatt supercritical carbon dioxide (sCO2) test facility at Southwest Research Institute (SwRI) in San Antonio — has generated electricity for the first time. SwRI collaborated with project lead GTI Energy and GE Vernova, the U.S. Department of Energy/National Energy Technology Laboratory, and several industry participants to develop the STEP Demo project.