This research service provides a high level overview of various energy generating technology types in South Africa, including nuclear, solar, hydro, wind, diesel and gas gensets, co-generation, open cycle gas turbines and closed cycle gas turbines. An introduction to each technology type is provided, along with general capital and operational expenses associated with each of them. General trends are also indicated where relevant and of interest. The main objective is to inform about alternatives to grid connectivity available in the market, their applicability and estimated relative costs. In addition, selected information on each technology type from an African perspective is also provided, serving contextual purposes.