Enphase Energy Publishes Technical White Paper on GaN Technology for Next-Generation Distributed Power Electronics

Enphase Energy, a global energy technology company based in Fremont, California, released a technical white paper on May 21, 2026, outlining its use of Gallium Nitride (GaN) Bi-Directional Switch (BDS) technology in distributed power electronics. The paper explains how GaN BDS—monolithically integrated to block voltage bidirectionally—enables higher efficiency, switching frequency, power density, and broader AC voltage compatibility for products like the IQ9 Series Microinverters, used in residential and commercial solar applications. The white paper contrasts GaN BDS with traditional bi-directional switches, which rely on two unidirectional transistors. By using a single device structure, GaN BDS reduces semiconductor die area, gate charge, and component count, lowering costs while improving performance. These advantages translate into smaller, more efficient power converters, particularly for high-frequency applications like Enphase’s modular architecture. The technology is being deployed in multiple product lines, including the IQ Bidirectional EV Charger and the IQ Solid-State Transformer (IQ SST) for AI data center power infrastructure. The IQ SST will incorporate higher-voltage GaN BDS and uni-directional switch devices, expanding voltage capabilities for commercial three-phase grid applications in the U.S. Enphase highlights four key benefits of GaN BDS: reduced switching and gate-drive losses for higher efficiency, lower gate charge enabling smaller magnetics and filters, expanded voltage support for commercial grids, and cost savings from monolithic integration. The company’s Chief Product Officer, Raghu Belur, emphasized that GaN BDS aligns with Enphase’s roadmap for microinverters, batteries, EV charging, and data center systems while maintaining its core distributed power architecture. The white paper positions GaN BDS as a critical advancement in power electronics, particularly for compact, high-performance applications where wide bandgap semiconductors like GaN are increasingly replacing silicon. Enphase’s adoption follows broader industry trends, with GaN already established in smartphone and laptop chargers, while silicon carbide dominates high-power EV and industrial systems.