The National Science Foundation (NSF) awarded a $399,680 Federal Project Grant (CFDA 47.041 - Engineering) to North Carolina State University to conduct a fundamental study and modeling of pressure-tolerant power electronics systems. The research aims to develop test methodologies, understand electrical-thermal-pressure relationships, and establish models to describe the impact of high hydrostatic pressure on power components and systems. The study will focus on critical passive power components and emerging wide bandgap semiconductor switches, with the goal of reducing costs, improving reliability and efficiency, and simplifying cooling and maintenance of underwater energy systems, vehicles, and infrastructure. Experimental validation will be performed at pressures up to 10,000 PSI, covering conditions for nearly all of the Earth's oceans, seas, and lakes. This research is expected to accelerate the deployment of reliable and lower-cost underwater exploration, habitats, and microgrids.