Emerging System Applications and Technological Trends in Power Electronics: Power electronics is increasingly cutting across traditional boundaries This article summarizes six emerging system applications, which include green energy system integrations; microgrids; all things grid connected; transportation electrification; smart homes, smart buildings, and smart cities; and energy harvesting. The four major technology trends playing a crucial role in driving the emerging system applications include adiabatic power conversion, monolithic powerconversion, multilevel power converters, and wide-bandgap devices.