The systems analysis work combines top-down energy industry analyses of the overall energy system at the regional, national and European levels with economic and technology-oriented bottom-up studies. The methods applied range from assessing renewable resource potentials through earth observation (using synergies with the Space research area), modelling the integration of renewable energy sources in high spatial and temporal resolution and developing data models for power and gas networks, all the way to studying scenarios to analyse and develop implementation strategies for the energy transition.