The widespread adoption of electric vehicles (EVs) requires a power quality-compliant fast charging infrastructure. This paper presents a comparative performance analysis of a grid-integrated photovoltaic (PV) assisted DC fast EV charging station using maximum power point tracking (MPPT). The proposed system integrates a PV array, MPPT controller, grid interface, inverter, front-end converter, DC link regulation, and EV battery charging unit. The effectiveness of a three-level inverter and three-level front-end converter (3LI-3LFEC) is compared with a conventional two-level inverter and front-end converter (2LI-2LFEC). Performance evaluation was carried out using DC bus voltage regulation, EV charging power, PV power contribution, battery voltage, charging current, state-of-charge (SOC) variation, and harmonic analysis. Simulation results show both configurations maintain a stable DC bus voltage near 800 V. The three-level configuration EV charging power achieves 2.386% increase and charging voltage and current reach approximately 926.61V and 102.90 A, respectively. The SOC increases from 0.2000 to 0.201833, validating successful battery energy transfer during the simulation interval. In 3LI-3LFEC, total harmonic distortion (THD) in current is reduced by 4.753%, whereas voltage THD is negligible in both configurations. Overall, the 3LI-3LFEC-based solar-assisted EV charging system provides improved charging performance and enhanced power quality for high-power DC fast-charging applications.