Hydrogen from renewables, or green hydrogen, is produced by electrolyzing water using electricity derived from renewable energy sources like solar photovoltaic systems, wind turbines, or hydropower. The electrolysis process splits water (H₂O) into hydrogen (H₂) and oxygen (O₂), with no greenhouse gas emissions when powered by renewables. This method contrasts with hydrogen from fossil fuels (e.g., natural gas reforming), which generates significant carbon emissions. Key to this production is the compatibility of electrolyzer technologies with renewables: PEM electrolyzers, for instance, excel in this context due to their ability to rapidly adjust to fluctuations in renewable power output. AEM electrolyzers, a newer technology, also show promise for integrating with renewables by balancing efficiency and cost. By linking hydrogen production to renewables, this approach not only provides a clean hydrogen source but also addresses the challenge of storing surplus renewable energy, making it a critical component of a sustainable energy ecosystem.