Method for controlling a power assembly

A computer-implemented method for controlling a power assembly, the power assembly comprising a fuel cell unit and an electric energy storage system for storing excess electric energy produced by the fuel cell unit, the method comprising:

• predicting a power demand for power delivery from the power assembly over a prediction horizon,
• calculating costs associated with controlling the power assembly according to at least two different control scenarios during the prediction horizon, wherein the at least two different control scenarios include a first control scenario in which the fuel cell unit is turned off, and a second control scenario in which the fuel cell unit is turned on, wherein, for each of said control scenarios, the associated cost includes at least:
• a cost associated with an expected ability or non-ability of the power assembly to deliver power according to the predicted power demand,
• a cost associated with fuel consumption, and
• a cost associated with fuel cell degradation,
• comparing the calculated costs of the respective at least two control scenarios to obtain a comparison result,
• selecting one of the at least two control scenarios based on the comparison result, and
• controlling the power assembly according to the selected control scenario.