The behavior of output voltage and leakage current in Solar photovoltaicsolar photovoltaic (PV) applications are significant concerns in transformerless grid-connected multilevel inverters (MLIs). A novel Boosting Common-Ground type MLI (BCGMLI) with an optimal component count is demonstrated in this paper. It provides a step-up output voltage while using less components than most state-of-the-art topologies. Improved voltage control, reduced component count, self-balanced capacitor-based boosting, and higher efficiency are all benefits of the inverter topology, which is developed to address significant issues in PV systems. In order to generate a 9-level two-fold phase voltage, BCGMLI uses just eight complementary operational switches. The proposed inverter architecture successfully resolves the problem of leakage current through its Common groundcommon grounding feature. In addition, this new inverter is capable of operating under sudden changes in modulation index, load disturbance conditions, sudden changes in input voltage magnitude, and managing reactive power when the grid experiences lagging or leading power factor conditions. With component design guidelines, in-depth explanation of the inverter's circuit operation, control strategy, pulse width modulation (PWM) method, and loss analysis is presented. The effectiveness and feasibility of the BCGMLI is demonstrated by showcasing experimental results.