The large-scale adoption of green hydrogen as a sustainable fuel is hindered by challenges such as the high cost of catalysts, the necessity of high-purity water, and dependence on grid energy sources. This work demonstrates a cost-effective silica-anchored cobaloxime molecular complex (4) as a multifunctional electrocatalyst for seawater splitting using solar energy, enabling round-the-clock green hydrogen production. This catalyst facilitates both the oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) at the cathode, as well as the oxygen evolution reaction (OER) at the anode. A commercial silicon photovoltaic cell was used to generate electricity from solar energy, which powered seawater electrolysis with the silica-anchored molecular catalyst (4) present in both the cathode and anode. This integrated photolysis system achieved a high solar-to-hydrogen efficiency of 14% and a power conversion efficiency of 17.4%. Additionally, a single-stack alkaline electrolyzer incorporating the silica-anchored cobaloxime catalyst (4) at both electrodes exhibited ~1.12 mmol/h green H2 and ~0.61 mmol O2 with the hydrogen conversion efficiency of 80 kWh kg-1-of-H2 under natural sunlight. The same catalyst (4) was utilized as an air-cathode material in a Zn-air battery, leveraging its oxygen reduction and evolution reaction properties. The battery is successfully charged via an appropriate silicon solar cell in 30 minutes, which stores solar energy and facilitates seawater splitting in the absence of sunlight for more than an hour. This integrated approach provides a constant and sustainable solution for green hydrogen production via renewable energy storage and utilization process.