The paper proposes a novel green-energy-based ‘hydroponic charging system’ design to power digital devices. The system relies on the principle of photosynthesis (PS-I and PS-II) of aquatic plants to derive biochemical current that charges gadgets such as smartphones. The focus lies in harnessing the plant’s ability to convert solar energy into electrical current. The proposed photosynthetic system interfaces with electrodes and electron mediators, transforming light energy into usable electrical power. The developed prototype uses carbon electrodes to capture electrons from a Monstera plant. The results reveal a significant fluctuation in DC voltage (0.40–0.51 V) which serves as an indicator of electrical energy generated by plants as part of photosynthesis or response to the external environment.