In response to the issues of redundancy and long power paths at the storage port in traditional photovoltaic energy storage three-port converter structures, this paper proposes a hybrid topology with optimal efficiency tracking capabilities. Based on a full-bridge converter, this topology reuses the Buck bridge arm and the full-bridge arm, and introduces a storage port, enabling voltage regulation and power control between the photovoltaic port, battery port, and load, thus achieving partial power path optimization. Through appropriate timing control, the proposed topology can both achieve maximum power point tracking for the photovoltaic system and adjust the power path between the photovoltaic and battery ports while maintaining constant output gain, thereby optimizing the overall converter efficiency. The paper provides a detailed analysis of the working principles of the proposed topology, including gain calculation and soft switching implementation conditions. Finally, an experimental prototype with a photovoltaic input range of 60–90 V, a battery port voltage of 48 V, an output voltage of 24 V, and a rated power of 160 W was built to validate the proposed solution.