SolidUltra Raises US$3.3 Million for AI Data Center Transformers
French startup SolidUltra has secured US$3.3 million (€3 million) from founding partner Watt & Well to develop modular solid-state transformers (SSTs) for AI data centers. Funding will support engineering, development and industrialization ahead of targeted commercial deployments in 2028.
Its medium-voltage system is designed to convert grid electricity to 800 VDC for computing. It uses 100 kW silicon-carbide modules, connected in series at the medium-voltage input and in parallel at the DC output. SolidUltra says the system can scale to 10 MW and beyond.
The project comes amid AI load growth and transformer supply pressure, examined in TT’s analysis of AI-driven transformer demand and report on data centers’ power-industry impact.
SolidUltra targets 98.5% conversion efficiency and three times lower losses than conventional architectures. These are targets, not verified results.
“AI is not only changing computing. It is fundamentally changing the electrical infrastructure required to power it,” said CEO Raul Iglesias.
Source: unite.ai
