This study assesses different combinations of water pretreatment (RO and UF) and solar energy input (PV, ST, and PTC), evaluating their techno-economic feasibility, efficiencies, environmental impact, and sustainability. . Hydrogen is one of the most intriguing energy sources for producing power from fuel cells and heat engines without releasing carbon dioxide or other pollutants. The production of hydrogen via the electrolysis of water using renewable energy sources, such as solar energy, is one of the possible uses. . Green hydrogen is a key factor in tackling climate change and facilitating the transition to a low-carbon future. Its production process relies on water electrolysis, a technology that uses electricity to split water molecules into hydrogen and oxygen. To be classified as “ green ”, the energy used. . Integrating a proton exchange membrane (PEM) electrolyzer with solar energy can aid this transition. Using treated sewage effluent, instead of deionized water, can make the process more economical and sustainable. Thus, the objective of this research is to demonstrate that an integrated. . HyLYZER® is our globally proven, modular water electrolyzer platform designed for easy on-site installation and simple interconnectivity for scaling up. Our commitment to engineering excellence powers the platform, adding two unique systems to our portfolio: HyLYZER® 500 and HyLYZER® 1000. The. . The coupling of photovoltaics (PVs) and PEM water electrolyzers (PEMWE) is a promising method for generating hydrogen from a renewable energy source. While direct coupling is feasible, the variability of solar radiation presents challenges in efficient sizing. The high costs and logistical challenges of electrolysis have resulted in limited widespread investigation and implementation of electrochemical. .