<p>This paper presents a comprehensive optimization of the performance of alkaline water electrolysis systems integrated with photovoltaic moduls for sustainable hydrogen production. The research investigates critical operating parameters, including electrolyte concentration (25-30 wt% KOH), temperature (25-80 °C), current density (100-500 mA/cm²), and power management strategies using maximum power point tracking (MPPT). Electrochemical impedance spectroscopy reveals a charge transfer resistance of 0.32 Ω·cm² under optimal conditions (30 wt.% KOH, 60 °C). The optimized system achieves a Faradaic efficiency of 90.9%, an energy efficiency of 55.9%, and an overall solar-to-hydrogen conversion efficiency of 13.5% with MPPT implementation, representing a 20.5% improvement over direct coupling. Long-term stability testing over 1000 hours confirms an electrode corrosion rate below 0.01 mm/year for 316L stainless steel electrodes. An economic analysis demonstrates a levelized cost of hydrogen (LCOH) of USD 1.85/kg for 1 MW-scale systems in the high-irradiation climate of Uzbekistan (2,150 kWh/m²/year), achieving a 26% cost advantage compared to temperate regions. The findings validate the technical feasibility and commercial viability of solar-powered alkaline electrolysis for industrial-scale green hydrogen production under Central Asian conditions. The primary scientific contribution of this research is the first comprehensive optimization study of alkaline water electrolysis tailored specifically to the climatic conditions of Uzbekistan (2,150 kWh/m2/year), demonstrating that 316L stainless steel electrodes can achieve 1000-hour operational stability with corrosion rates below 0.01 mm/year, providing a cost-effective alternative to expensive noble-metal catalysts.</p>