What will energy generation be like in the future? Which energies are affordable, which ones are not worth it in the long run? To answer such questions, so far experts have had to tediously gather and evaluate energy system data such as load and feed-in time series or installed outputs. The platform Open Power System Data gives researchers free access to Europe-wide energy data and scentific scripts for the first time - free of charge and freely usable. With the open-science portal the University of Flensburg and its partners TU Berlin, DIW Berlin, and Neon Neue Energieökonomik facilitate scientific studies and boost cooperation.