Abstarct: The integration of sustainable energy sources, especially solar PV systems, into the power grid has attracted considerable attention due to their potential for clean and sustainable energy production. This thesis discusses the incorporation of maximum power point tracking (MPPT) performance into a five-level grid-connected PUC cell inverter designed for efficient operation under variable solar PV conditions. The proposed inverter architecture provides improved voltage levels and reduced switching losses, improving overall system performance. By integrating the MPPT function, the operating point of the PV array is dynamically adjusted to extract the maximum available power even under varying solar radiation and temperature conditions. This system uses a proportional response (PR) controller to inject the converter current into the grid. By regulating the output current and voltage of the inverter, the PR controller ensures that the system maintains high power quality and reliability. A modified version of the PR controller, known as the pseudo-PR controller, is implemented to address the issues associated with the infinite gain of the traditional PR controller. The PR controller provides faster response to disturbances and better management of resonant frequencies in the system than conventional PI controllers, thereby improving system stability and performance. We performed the simulation and the simulation results showed that the combination of maximum power point tracking (MPPT) function in the five-level PUC cell inverter significantly improves the overall performance of the system.