In this project, propose an efficient intelligent controller for FLY BACK converter with an isolated 31-level inverter for grid connected PV system is implemented. PV application based MLI requires multiple voltage sources and in most of the MLIs, the loads shared by the voltage sources are varying due to inverter’s topology and switching methods. This reduces the utilization of the PV array. PI controller is employed to maximise the output of the PV system. For optimal PV module utilization, an asymmetric cascaded thirty one-level multilevel inverter (MLI) is introduced in this thesis as an intermediate stage between converter and grid. The controlling of inverter is made by synchronizing the grid current and voltage and current using the closed loop control technique. FLY BACK converter is used as it has excellent voltage-gain ratio. The PI controller is proposed to perform the grid synchronization operation. The simulation and modelling of the introduced FLYBACK converter and thirty one-level inverter configurations with their control techniques are done in MATLAB domain so as to demonstrate the grid connected PV system performances.