Green hydrogen production involves using renewable energy (solar, wind, hydro) to power electrolysis, splitting water into hydrogen and oxygen without carbon emissions. Key technologies include: alkaline electrolyzers (mature, cost-effective for large-scale use), PEM electrolyzers (high efficiency, fast response for variable renewable inputs), and AEM electrolyzers (emerging, combining low costs with PEM-like performance). The process starts with renewable energy generation, followed by electrolysis, hydrogen purification, and storage. For example, Ørsted’s P2X facilities use wind/solar power to produce green hydrogen for e-fuels like e-methanol. Hyto’s production methods likely emphasize scalable, modular systems that optimize energy conversion efficiency and minimize water usage, ensuring alignment with circular economy principles.