The generation of electricity and heat is the largest single activity covered by the EU Emissions Trad-ing System (EU ETS). This report provides an in-depth analysis of the electricity sector since the EU ETS was introduced in 2005. It allows key drivers behind the development in capacities, generation levels and emissions to be identified. It thereby provides key information from past developments which form the basis for future projections and the design of tailored policy instruments. The re-port provides information on the European level as well as for 10 selected European countries: the Czech Republic, Estonia, France, Germany, Italy, the Netherlands, Poland, Romania, Spain and the United Kingdom.