The global energy system is undergoing massive transformations that originate from far-reaching changes in societal, business, and technical paradigms. Data-driven energy system analysis embracing the open science paradigm is a prime tool to monitor, assess, and support necessary transformative changes. While the availability of new data collection and analysis techniques is boosting energy science, the growing degree of complexity and uncertainty through the integration of different types of data streams and numerous interlinkages within the socio-technical systems require new concepts to enable the documentation and eproducibility of scientific results. Open science research has a pivotal role to play in this respect because it enables the detection of conflicts across findings in different disciplines as well as harvests synergies between he disciplines involved. The presentationbwill discuss current practices and future directions of open, data-driven energy system research, drawing from a review of on-going practices and discussions in the European energy research community. It will also give a short introduction into the up-coming Horizon 2020 project EERAdata.