The product about single-stage solar photovoltaic (SPV) array grid integrated system using a Neutral clamped Converter (NCC). The NCC also provides power quality features such as harmonics mitigation, power factor correction and perturb and observation-based maximum power point tracking for an SPV grid-interfaced system. With this approach, the NCC has the active power flow from the SPV array to the grid and it also performs the non-linear load current harmonic compensation by keeping the grid current almost sinusoidal. On the other hand, in the night mode, if the SPV power is not available, the NCC works as an active power filter for the harmonics elimination and reactive power compensation. This increases the effective utilization of the NCC. The proposed system is modelled and simulated using MATLAB/Simulink.