The most cost-effective design for generating hydrogen from PV solar for a multi MW project size will depend on several factors, including the location, climate, available resources, and the specific needs and goals of the project. However, some general principles and strategies that can help to maximize cost-effectiveness include:

Overall, the most cost-effective design for generating hydrogen from PV solar for a multi MW project size will depend on careful planning, optimization, and integration of the various components of the system, along with a comprehensive cost analysis to ensure that the system is economically viable in the long-term.