This chapter outlines an integrated approach to water electrolysis by photovoltaic (PV) technology for sustainable green hydrogen generation. A foundational overview pertaining to the operational principles of photovoltaic systems and water electrolysis, this chapter further discusses the diversity of solar cells and electrolyzer, highlighting their respective efficiencies, proceeding to an in-depth knowledge of how the two technologies work and the synergy resulting from their combination. Key concepts discussed include principles of photovoltaics and electrochemistry relative to the splitting of water. An exploratory advancement in optimization and control strategies by advanced power electronics for lessening power fluctuations owing to the variability of solar energy and the dynamic requirements of the electrolytic systems are provided. These parts accentuate the importance of integrating smart management systems to improve the efficiency and stability of PV-assisted electrolysis setups. In the optimization context of the system, the chapter emphasizes techniques set to maximize hydrogen production. These include various control algorithms and system configurations designed in such a way that they can be adapted to different inputs of solar while maintaining an optimum output of hydrogen. This chapter analyzes the practical cases and real-world applications from which to extract the scalability and performance of existing systems by investigating the economic viability and market analysis for PV-assisted electrolysis, especially as a renewable energy source. Finally, it presents future challenges: the research needs that already exist and potential technological advances. It demands continuous innovation and collaboration to surpass barriers that exist currently and increase the feasibility of producing solar-powered hydrogen. By charting out these pathways, the chapter is intended to contribute toward the broader goal of transitioning toward a sustainable and economically viable hydrogen economy.