As the world shifts towards clean and sustainable energy solutions, hydrogen has emerged as a viable candidate for decarbonizing various sectors due to its versatile nature and zero-emission combustion properties. However, the current dependency of hydrogen production on fossil fuels raises concerns about greenhouse gas emissions and environmental impact. To address this, sustainable methods for green hydrogen production are being developed, with water electrolysis standing out as a promising solution. Electrolyzers like alkaline, proton exchange membrane, and solid oxide cells offer high purity and efficiency in hydrogen production. By integrating renewable power sources such as photovoltaic and wind turbines, the production of 'green hydrogen' can be achieved, reducing carbon emissions and enhancing energy security. Research on hybrid energy systems combining solar, wind, and biomass power generation for hydrogen production demonstrates significant efficiencies and cost-effectiveness in various regions. Optimization techniques further improve system efficiency and maximize the use of renewable energy sources, emphasizing the potential for a sustainable energy transition.