Heron Power is investing more than $100 million to convert a 286,000-square-foot California warehouse into a factory capable of producing 10,000 solid-state transformers per year, a volume the company says represents 40-plus gigawatts of medium-voltage capacity and the largest single-year transformer buildout in over two decades. Mass production is scheduled to begin late next year, and Chief Executive Drew Baglino reports strong early interest from electric utilities and data-center developers racing to secure grid equipment amid unprecedented demand.
The move signals a potential inflection point for solid-state transformer technology, which replaces the heavy iron cores and oil baths of conventional units with power-electronics-based architectures that are smaller, lighter, and inherently controllable. For utilities, that translates to faster deployment, reduced substation footprints, and the ability to manage voltage and power quality dynamically — capabilities that grow more valuable as inverter-based resources proliferate. For data-center operators, the compact form factor and rapid ramp rates align with the compressed timelines and dense power requirements of AI-driven campuses.
Transformer supply chains have been a critical bottleneck across North America, with lead times for large power transformers stretching past two years and prices doubling since 2020. Heron’s medium-voltage focus — typically 4 kV to 69 kV — targets the distribution and interconnection tier where data centers, solar-plus-storage plants, and industrial electrification projects connect. If the company can deliver at the stated scale, it would represent a meaningful new domestic source at a time when the U.S. grid is adding gigawatts of new load and generation annually.
Baglino, a former Tesla energy executive, has assembled a team steeped in high-volume power-electronics manufacturing, and the company’s choice of a brownfield warehouse conversion over greenfield construction reflects a capital-efficient approach to rapid scale-up. The broader market will be watching whether solid-state transformers can achieve the reliability track record and cost parity that utilities require for widespread adoption. Early deployments with pilot partners will likely determine the pace at which this technology moves from niche applications into mainstream grid infrastructure.
Read the full report at Energy Central.