Former Tesla executive Drew Baglino makes the case that solid-state transformers…
Former Tesla executive Drew Baglino makes the case that solid-state transformers, built from modern silicon carbide power semiconductors, could become a foundational technology for rebuilding the U.S. grid. He frames the problem as a mismatch between rapidly growing electricity demand—from datacenters, EVs, heat pumps, reindustrialization, and AI—and a grid whose key assets are aging out just as delivery costs are overtaking generation costs as the main driver of electricity prices. In his telling, utilities are trapped by conservative planning assumptions, capital-deployment incentives, and blunt legacy equipment that lacks telemetry and dynamic control, leading planners to overbuild instead of actively optimizing existing infrastructure.
The proposed alternative is to bring the “Moore’s Law” trajectory of power electronics into medium-voltage distribution systems. Baglino points to decades of advances from thyristors and IGBTs to silicon carbide MOSFETs, noting major gains in switching speed, voltage handling, power density, and cost. He argues these improvements now make solid-state transformers practical: programmable conversion platforms that can replace not just conventional transformers, but also some switchgear, tap changers, capacitor banks, and balancing equipment. The article acknowledges remaining challenges—grid protection integration, cybersecurity, and field reliability—but presents them as engineering problems rather than scientific barriers. Overall, it is both a technology thesis and an industrial-policy argument for modernizing grid hardware with software-controlled, semiconductor-based systems.