Solid-state transformer for up to 36kV grid voltage under development
- August 14, 2026
Siemens and Reinhausen (MR) are advancing the future of power solutions for the AI era through a strategic partnership.
Together, the companies are developing and will industrialize a solid-state transformer for up to 36kV grid voltage. The technology is being developed for deployment in AI data centers, Siemens said in a release.
AI is driving a fundamental transformation of data center infrastructure. The industry is moving from traditional power architectures towards more efficient and scalable solutions capable of supporting the next generation of AI workloads. Solid-state transformers are one of the key building blocks of that transition. AI-ready data centers and high-density power infrastructures are increasing the requirements for medium-voltage connection, power density, efficiency, and availability.
For an 800VDC distribution system, a medium-voltage solid-state transformer provides a compact, efficient, and galvanically isolated alternative to conventional multistage AC/DC power-conversion architectures. In this architecture, medium voltage AC is converted to 800 VDC and distributed to the data centers, reducing intermediate conversion stages and enabling more efficient power delivery to high-density AI infrastructure.
The partners
MR is the world’s leading manufacturer of voltage regulation technology for power transformers and has decades of experience in power quality and grid stability. The company has also developed extensive know-how in the field of medium voltage power electronics and related components, which are at the heart of modern SST architectures.
Siemens combines deep expertise in power electronics, electrical power solutions, grid protection and automation systems as well as digitalization. In the deployment of SSTs, Siemens applies its capabilities in grid integration, power conversion, protection and control to deliver the next-generation energy transmission systems for AI data centers.
Key features
Key features of the offering include modularity, scalability, and high availability. The design supports operation up to 36kV and can be modularly applied to lower voltages, making the architecture scalable for different grid-connection conditions. It delivers a stable 800 VDC output for applications that require a stable DC-link voltage and direct coupling to downstream DC distribution or load systems. The SST design is built around clearly defined interfaces, and protection technology to support reliable operation in demanding infrastructure environments.
Featured photograph (source: siemens.com) is for representation only