A research group led by scientists from the German Aerospace Center (DLR) has conducted a study simulating the installment of photovoltaic (PV) modules on cruise ship balconies to power their utilities efficiently. The study proposed three different DC configurations for PV integration and compared their efficiency during simulated cruises in the Caribbean, Norwegian, and Danish waters. The researchers suggested installing two 250W, 22%-efficient panels on each cabin balcony, with different orientations, to potentially achieve a maximum output of 827.5 kW on a Helios class cruise ship with 1,655 balcony cabins. By connecting the PV systems to a 350 V distribution network, the study aimed to optimize performance and ensure safe operation. Simulations indicated a significant potential for energy savings, with self-sufficiency levels of 45% and 47% observed during Caribbean and Norwegian cruises, respectively. The study also highlighted the importance of battery storage for emergency power and peak load buffering. Overall, the research findings were positive, emphasizing the efficiency and performance modeling of PV systems for cruise ship cabins with battery storage using direct current distribution networks.