Within the project eXtremOS, application-oriented energy balances for 30 European countries were created. The methodical combination of different statistical energy data allows for national final energy consumption to be presented in different levels of detail (sectors, applications, energy sources and branches). For one thing, the balances enable energy-related analyses, e.g. the highlighting of country-specific characteristics or cross-country comparisons. For another, the statistical data can serve as model input for energy system modeling.