U.S. grid constraints are increasingly a delivery problem rather than a…
U.S. grid constraints are increasingly a delivery problem rather than a generation problem: average residential electricity rates have risen about 25-30% since 2019, while transmission and distribution now make up nearly half of customer bills in many regions even as wind, solar, batteries, and gas generation costs have fallen.
- The article argues the grid is aging into a demand surge: about 70% of U.S. transmission lines and large power transformers are over 25 years old, more than half of distribution transformers are nearing end of life, and ASCE gave U.S. energy infrastructure a D+ in 2025.
- Transformer supply has become a bottleneck, with demand more than doubling since 2019, costs up 80%, and an estimated 30% U.S. supply deficit; the piece also notes that 80% of supply is imported and domestic transformer steel production is highly concentrated.
- Power semiconductor progress is presented as the enabler for grid modernization: since the early 1980s, switching speeds have improved by four orders of magnitude and current density by more than three, with modern silicon carbide MOSFETs switching in nanoseconds and blocking thousands of volts; the sector now generates roughly $60 billion in annual sales.
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.