The transportation sector is undergoing a transformative shift towards electric vehicles (EVs) to mitigate environmental concerns and reduce reliance on fossil fuels. As EV adoption continues to rise, there is a growing demand for efficient and high-power fast-charging infrastructure to accommodate the needs of EV users. This paper presents a novel approach to bi-directional EV fast charging by integrating solar energy and ultra-wide bandgap power devices, aiming to enhance both the sustainability and performance of EV charging systems. The proposed system combines state-of-the-art solar photovoltaic technology with ultra-wide bandgap power devices such as gallium nitride (GaN) transistors to create an advanced bi-directional EV fast charger. The integration of solar panels allows the charger to harness renewable energy, reducing its environmental footprint and reliance on the grid. Additionally, the use of ultra-wide bandgap power devices enhances the charger’s efficiency, power density, and reliability. The paper includes a comprehensive analysis of the design and performance of this innovative EV fast charger. We present simulation results and experimental data to evaluate its efficiency, power output, and charging capabilities. Furthermore, a detailed cost–benefit analysis is conducted to assess the economic feasibility and potential return on investment for deploying such a solar-integrated ultra-wide bandgap power device-based bi-directional EV fast charger. The findings of this study demonstrate the significant potential of this technology in enhancing the sustainability and performance of EV charging infrastructure. By harnessing solar energy and utilizing ultra-wide bandgap power devices, in addition to offering electric vehicles a quick and dependable charge, this bi-directional EV fast charger can lower greenhouse gas emissions and improve the transportation industry’s overall sustainability. This research serves as a crucial step towards a cleaner and more efficient future for electric mobility.