This study addresses the power loss issue in traditional monofacial PV Trombe walls due to the design of PV glass plate transmittance and the thermal challenges of winter heating and summer cooling in regions with hot summers and cold winters. An innovative bifacial PV Trombe wall system with built-in reversible louvers has been proposed. An experimental platform was established in Nanjing to compare power generation performance and thermal behavior of the bifacial PV Trombe wall system with and without reversible louvers during the non-heating season. The results show that the system with reversible louvers improved the overall power generation efficiency from 15.40% to 16.17%, with a total power generation increase of 5.04%. Furthermore, the system not only maintains uniform vertical temperature distribution across the components but also significantly reduces the peak temperature and the rate of temperature increase in the heat-collecting wall, thereby decreasing the building's thermal load. It was also observed that the wall experienced reverse heat transfer to the photovoltaic components in the absence of louvers, negatively impacting their performance and stability. However, the integrated adjustable louvers effectively mitigated this issue. Furthermore, the investigation into the impact of PV cell coverage on the energy output of both traditional PV Trombe walls and the bifacial PV Trombe wall system revealed that both configurations experience a reduction in energy output as coverage decreases. Notably, the energy output of the bifacial PV Trombe wall system declines at a slower rate. At a coverage level of 0.5, the difference in energy output between the two systems reaches its maximum, with the bifacial PV technology enhancing the energy output of the traditional PV Trombe system by 17.46%.