The Flying Capacitor Multicell Inverter (FCMI) possesses an inherent balancing of voltage across the capacitors and it is used to distribute the input voltage and minimize the voltage stress. This FCMI's RMS is first controlled with fuzzy controller and the outputs are analyzed, then a suitable Model Predictive Controller (MPC) is considered to be in command of the RMS voltage of the Flying Capacitor Multicell Inverter and the outputs are measured up to with fuzzy controlled FCMI. The controller (Fuzzy and MPC) are considered for different levels of FCMI circuits and has been found that MPC controller gives better performance as compared to the fuzzy controlled FCMI. To weigh against the performance of Fuzzy and MPC controllers the Rise time, Settling time, Overshoot, Peak and Peak time are taken as comparison parameters and the comparison chart is presented for analysis.