Researchers have developed a cost-effective single-source 25-level inverter that achieves a twelvefold voltage gain with redundant switching and hybrid modulation. Other studies have explored similar inverter technologies, including a seven-level and a 17-level inverter, as well as various modulation techniques to improve performance. The specifics of these inverters and their applications vary, with some focusing on reliability, device reduction, and voltage stress, while others examine the effects of parasitic capacitance and thermal performance.