<p>This study introduces an advanced bidirectional multi-port DC-DC converter that serves as a versatile interface unit, integrating two unidirectional and two bidirectional ports. This design allows three distinct input sources to be efficiently combined. The bidirectional load port can draw power from individual input sources or multiple sources simultaneously. Additionally, the battery port supports charging not only from the input power sources but also from recovered energy from the load port, enhancing overall energy utilization. Compared to conventional converters, the proposed design offers greater flexibility and improved performance. Key advantages include step-up operation, continuous input currents, reduced voltage stress on semiconductor components, and a common ground connection among all ports, simplifying system integration. To ensure accurate performance assessment, the converter is analyzed in continuous conduction mode using mathematical modeling. Its performance is further validated through experimental testing on a laboratory prototype, with the results confirming its efficiency and suitability for practical energy management applications.</p>