The paper evaluates hybrid renewable energy systems combining hydropower and hydrogen storage, analyzing their Levelized Cost of Energy (LCOE) and Storage (LCOS). It highlights the efficiency and economic viability of these systems, with LCOS values ranging from $0.044 to $0.1 per kWh for hydropower and $0.04 to $0.068 per kWh for hydrogen. The study highlights hydropower’s cost-efficiency and hydrogen’s flexibility in balancing renewable energy intermittency. While the study provides detailed cost analyses, could the authors clarify the geographical and temporal assumptions underlying the LCOE calculations, as regional and seasonal variations can significantly influence costs? Moreover, Figures 9 and 11 present hybrid system costs but lack clear differentiation between peak and off-peak values. Could the authors also elaborate on the specific data sources and methodologies used to generate these figures to ensure transparency and reproducibility?
