This report provides up-to-date cost and performance data on renewable electric power generation technologies such as wind, solar thermal, solar photovoltaic, and biomass; fossil fuel-based technologies such as pulverized coal, fluidized bed combustion, integrated coal gasification combined-cycle, open-cycle gas turbine, and combined-cycle gas turbine; nuclear technologies; and energy storage technologies. This study updates results from a 2017 project, incorporating technology enhancements, better highlighting the potential influence of market factors, enhancements to design, and revisions to cost and performance data. The South African government’s Department of Mineral Resources and Energy is in the process of evaluating these technologies for future capacity additions, and the independent data and expertise presented in this report will facilitate the Integrated Resource Plan process of South Africa.