Abstract The goal of lowering the size and expense of grid-connected solar systems has led to a recent surge in interest in transformerless grid-connected inverter advancements. However, achieving the maximum power from individual modules is a significant restriction in such systems. A modular transformerless grid-connected solar multilevel inverter that can accomplish each module's maximum power point (MPP) under various operating conditions is proposed in this study. There is flexibility to expand the number of inputs with fewer components thanks to the straightforward and modular architecture that is being given. For the suggested system, a single-phase synchronous reference frame PI (SRF-PI) controller has been developed and implemented, and the methodical process for doing so has been explained.

Keywords: Mppt, Transformerless Inverters, Photovoltaic, Grid Tied.

| DOI: 10.17148/IARJSET.2024.111027