The fuel cell stack has to be observed and understood as a complex system of components all interacting within each other and not as an association of single standalone components. This is the greatest challenge in the ENDURANCE project, since it is of vital importance to the creation of a powerful predictive model for SOFC stack operation.

The fuel cell stack is a system of interfaces/interphases where complex phenomena occur. The project aims to isolate, break down, and separate them in single phenomena processes. These "single phenomena" are generated by the minimum of interfaces/interphases in a quasi-independent way and therefore suitable for a separate deep investigation via micro-sample studies. To overcome this important challenge the team of ENDURANCE researchers works together to understand how to separate the minimum interphases/interfaces to be studied separately by single sample rigs and by segmented stacks.