**Data Availability Statement:** Not applicable.

**Acknowledgments:** This study was conducted as part of the GENESIS project (https://www.genesiscleansky.eu/ (9 March 2023)). The authors are grateful to all project partners for the fruitful discussions and expert advice about the main elements of hybrid-electric architectures, which formed a solid theoretical foundation for the studies presented in this work.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

### **Abbreviations**

The following abbreviations are used in this manuscript:

