Within this project, power generation technologies possibly contributing to Swiss electricity supply until 2050 are evaluated. The evaluation concerns technology development, generation (or import, respectively) potential, cost of electricity, and environmental burdens along complete energy chains (Life Cycle Assessment). Domestic options for power generation to be analyzed are small and large hydro power, wind power, photovoltaics, biomass, geothermal power, natural gas plants, nuclear power and fuel cells. Offshore wind, wave & tidal as well as solar thermal and coal power are taken into account for electricity imports.