This technical note details the implementation of a closed-loop current control and grid synchronization system for a three-phase, three-wire Neutral Point Clamped (NPC) inverter. Serving as a core subsystem in a fast electric vehicle charging topology with intermediate storage, the grid-tied NPC inverter manages bidirectional power flow between the DC storage bus and the AC grid. The proposed control framework is implemented in the synchronous dq-reference frame using a dq-type phase-locked loop (PLL) for precise grid synchronization and proportional-integral (PI) controllers equipped with anti-windup protection. The system integrates an active DC bus balancing strategy to mitigate neutral-point voltage deviations caused by grid unbalances. Complete hardware setup descriptions are provided alongside downloadable Simulink control templates utilizing both carrier-based and space-vector modulation techniques. Experimental validation results demonstrate accurate reference tracking and rapid transient response under nominal operating conditions.