SolidUltra raised €3 million within three months of its incorporation. Founding partner Watt & Well, a French power-electronics group, provided the backing. The company builds modular solid-state transformers for AI data centers.
Funding details
The announcement came on November 9, 2026. The money will support product development, engineering, industrialization, and early customer engagement. SolidUltra targets its first commercial deployments in 2028.
Company context
SolidUltra was founded in June 2026 in Massy, France. Its co-founders include Raul Iglesias, Romain Beaume, Alain Rouault, and Watt & Well. Watt & Well manufactures power electronics at gigawatt scale in France and the United States.
How the product works
The medium-voltage transformer connects the grid directly to 800VDC in one conversion stage. It targets 98.5% efficiency and a footprint four times smaller than conventional systems. Its modular design scales from 300 kW to 10 MW and supports field-replaceable modules.
After its 2028 launch, SolidUltra plans to scale production rapidly. By 2032, the company aims to deliver 10,000 modular systems, representing approximately 1 GW of installed power. It also intends to serve the market on a global scale.