Nageswar Rao, B.N.Yellasiri, Y.Kishan, D.Karunakaran, E.2026-02-062024Proceedings of the International Conference on Power Electronics, Drives, and Energy Systems for Industrial Growth, PEDES, 2024, Vol., 2024, p. -28363841https://doi.org/10.1109/PEDES61459.2024.10960885https://idr.nitk.ac.in/handle/123456789/29160Galvanic isolation is a crucial component of grid-connected solar PV systems. Despite the increasing adoption of multilevel inverters (MLIs) for grid-connected applications, the literature lacks sufficient discussion on the isolation of these inverters. This paper introduces a 25-level isolated multilevel inverter topology that utilizes only fourteen switches. The proposed configuration incorporates three transformers, each connected via a combination of three bidirectional switches and two H-bridges. This single-phase isolated inverter efficiently generates a 25-level AC output voltage with a voltage gain of 6 while requiring fewer switches. The design of the proposed converter is compared with state-of-the-art multilevel inverters described in the literature. Simulations conducted using MATLAB software demonstrate that the proposed MLI delivers high-quality power, even under dynamic conditions. © 2024 IEEE.invertersisolated convertersMultilevel Converterspower electronicspulse width modulation