In recent years, there is an increasing demand for flexible, time- and location-independent academic study programs. For this reason, blended-learning concepts have been and are being developed in many disciplines. Such programs can be studied mainly online and part-time, from all over the world, supplemented by short on campus periods. In the field of Renewable Energy education, the blended-learning master's degree program Renewable Energy Online has been developed at the University of Oldenburg, Germany. This article aims at presenting the concept of this program. Thereby, it focuses on learning-teaching concepts, which address the motivation of students and the needs and resources of diverse groups of students.