Solar panels on cruise ships could indeed help power some of the onboard systems like lights and cabin A/C, reducing the overall fuel consumption. However, there are a few challenges to consider. The main issue is the size and efficiency of the panels needed to generate significant power. Cruise ships consume a lot of energy, and the surface area available for solar panels might not be enough to make a huge impact. Additionally, the increased wind drag from the panels could offset some of the fuel savings, but this could potentially be mitigated with smart design and placement of the panels.
I installed solar panels on my house last year, and the experience has been very positive. The main reasons I went solar were to reduce my energy bills and decrease my carbon footprint. The upfront cost was significant, but the long-term savings and environmental benefits made it worth it. For your idea to work on a cruise ship, you would need a similar cost-benefit analysis to ensure it's practical. If the technology continues to improve and panel efficiency increases, it could become a more viable option for large-scale applications like cruise ships. You can find more information on the latest advancements in solar technology and their applications here.