Abstract Amid rising fossil fuel costs and intensifying climate challenges, integrating electric vehicles (EVs) into hybrid smart grids offers a scalable pathway to improve energy efficiency and enhance grid reliability. This study proposes a novel bidirectional power interface that enables seamless vehicle-to-grid (V2G) and grid-to-vehicle (G2V) energy exchange. The proposed topology employs a single bidirectional converter and three parallel isolated DC-DC converters to support fast charging and ancillary grid services. Comparative analysis highlights its technical superiority by reducing voltage/current stress, minimizing device count, achieving compact implementation, and eliminating isolation requirements in the DC stage relative to conventional grid-tied units. Parallel battery operation provides independent control, mitigates charge imbalance, and ensures reliable full-load current delivery without overcharging or deep discharging individual cells. The system is validated through detailed MATLAB/Simulink simulations using a DQ-frame control strategy for accurate power regulation. Results confirm enhanced battery management, extended system lifespan, and reduced environmental impact, contributing to developing resilient and low-carbon hybrid energy systems.