The topic of the thesis is highly relevant and aligns with current trends in the fields of electromobility, renewable energy and energy storage. The use of second-life batteries to support peak-load shaving of fast-charging infrastructure represents a significant area of research and industrial practice.

Student approached the assignment systematically and proactively. They regularly consulted partial outcomes and progressively incorporated the supervisor’s feedback. It is evident that they gained a deep understanding of the topic and were capable of independently addressing both technical and analytical challenges. The thesis is overall at a good technical and formal level; however, it exhibits certain shortcomings, mainly resulting from the limited time frame (3 months).

Despite this short timeframe, the student was able to fully complete all points of the assignment. Therefore, I recommend the thesis for defense and propose the final evaluation with a grade of A. Points proposed by supervisor: 90

The student clearly conducted a thorough and extensive analysis of the developed SL-BESS model, providing a highly detailed overview of the model’s structure and individual mechanisms/components. The student demonstrated excellent understanding of the practical engineering and deployment of the SL-BESS for the given scenario, highlighting their theoretical knowledge of electrical systems and applications.

Some shortcomings were clear in the literary review aspect of the thesis. The absence of supporting references for several key statements limited the integrity of some aspects of the thesis. Furthermore, the student could have significantly improved the environmental and economical evaluation aspect of the thesis with some key adjustments and consideration backed with more literary support. Given that this was a significant aspect of the justification of the proposed model, this should have been a more complex and detailed aspect, or at least simplified with supporting estimates of error margins and clearly defined limitations to the evaluation; e.g., mentioning the variable renewable energy share in the Czech energy grid or variable electricity prices on an hourly basis and how this would significantly impact the environmental and economical calculations. Topics for thesis defence:

1. How did you justify the use of a constant grid CO2 emission factor of 0.35 kg CO2/kWh (aside from the increased projections of future electricity demands mentioned in the thesis) regarding the fluctuations seen at an instantaneous rate (hourly, minutes, or seconds on most public data sites) due to changes in supply and demand causing the renewables share to fluctuate from anywhere between 0% to 50% of the grid energy mix, and thus causing significant CO2 emission fluctuations throughout the day?
2. Could you include the projection of increasing EV use in the Czech Republic into the assumed 6,340 charging sessions per year to better calculate the net profits and total power consumption/delivery?

Points proposed by reviewer: 86