Siemens and Reinhausen turn up the voltage for hungry AI racks

Not a German cop show, but a pair of engineering firms aiming to feed 800 VDC to next-gen kit

Siemens and fellow German engineering biz Reinhausen are developing a solid-state transformer (SST) to deliver 800-volt DC power directly to increasingly dense AI datacenter racks.

As AI hardware grows hotter and hungrier, server farm operators are looking to overhaul how power moves through their data halls. One approach, favored by Nvidia and other industry heavyweights, is distribution at 800 VDC.

The two electrical enterprises are therefore developing a modular SST capable of converting medium-voltage AC at up to 36 kV into a stable 800 VDC output for downstream distribution.

Siemens says that the SST will provide a compact, galvanically isolated alternative to conventional multistage AC-to-DC power conversion architectures, reducing intermediate conversion stages and enabling more efficient delivery to high-density AI infrastructure.

According to Reinhausen, datacenters supporting AI workloads are among the...

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