Design and Economic Assessment of a Sustainable Standalone Photovoltaic System for Hospital Lift Applications

This study presents an optimized design and operation strategy for a stand-alone solar photovoltaic power system to drive a 4.5 kW elevator at Mansoura University Hospital, Egypt. The research aims to reduce the battery bank capacity and overall system cost while maximizing the utilization of solar panels. A novel "Optimum Operator System" is proposed, incorporating three power switches controlled by an Arduino microcontroller. The system's performance is analyzed through extensive modeling, simulation, and experimental validation. Results show a significant reduction in battery bank capacity, with 7 fewer 100 Ah batteries required compared to conventional systems. The proposed method significantly enhances system efficiency while also lowering overall costs. It achieves these improvements through optimized processes and innovative technologies that streamline operations. In addition to these economic advantages, the method provides substantial environmental benefits, such as reduced carbon emissions and increased use of sustainable resources. This combination makes it an appealing solution for various applications within institutional settings, ranging from educational institutions to government buildings. Furthermore, aligning with Egypt's renewable energy goals addresses immediate operational needs and contributes to the country's long-term commitment to sustainability and environmental stewardship.