The hydrogen production cost is higher if using wind/H 2 rather than PV/H 2. The concentrated CSP/H 2 system needs a power cycle. Minimum maintenance is required, and a power cycle is not needed to produce electricity. PV/H 2 and wind/H 2 systems are both suitable in remote and arid areas. The hydrogen production cost depends on several factors, such as renewable energy sources, electrolysis type, weather conditions, installation cost, and the productivity of hydrogen per day. Finally, an economic assessment of green hydrogen production is given. A comparative study of different types of electrolyzers was also presented and discussed. ![]() A comparison of the different methods for hydrogen production based on PV and WG systems was given in this study. The technology of water decomposition based on renewable energy sources, to produce hydrogen, can be achieved by different processes (photochemical systems photocatalysis systems, photo-electrolysis systems, bio-photolysis systems, thermolysis systems, thermochemical cycles, steam electrolysis, hybrid processes, and concentrated solar energy systems). Different technologies based on solar energy which allow hydrogen production are presented to study their benefits and inconveniences. Hydrogen (H 2) production based on solar energy is considered to be the newest solution for sustainable energy. Several research works have investigated the direct supply of renewable electricity to electrolysis, particularly from photovoltaic (PV) and wind generator (WG) systems.
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