The significance of this I-Corps project is based on the translation from lab to market of high-voltage, silicon-carbide (SiC)-based, multilevel power electronics building blocks (PEBBs) — a technology with the potential to modernize critical energy and propulsion systems. Power electronics refers to the branch of electrical engineering that deals with the conversion, control, and management of electrical power using semiconductor devices such as diodes, transistors, and silicon-carbide (SiC) components. These systems enable efficient power conversion across different voltage and current levels, making them essential for modern energy applications. The U.S. faces urgent challenges in upgrading its aging power grid, integrating new energy sources, and accelerating electrification in aerospace and space power systems. The impact of this technology extends beyond engineering innovation; it supports a more efficient and resilient energy infrastructure, fostering economic growth and technological leadership in the U.S. power and electrification industry. This project investigates the commercialization of a class of high-voltage, silicon-carbide (SiC)-based, multilevel power electronics building blocks (PEBBs). The PEBB is a generic block that can be connected to form a class of modular and scalable high-voltage and high-power converters capable of performing any conversion type, alternating current (AC) - direct current (DC), DC-AC, DC-DC, and AC-. The PEBB uses a neutral-point