What changed
Envision Energy announced the completion of the world’s first commercial data center deployment of an integrated 800-volt DC power system. The Dubhe Controller, supported by the Dubhe Energy Foundation Model, has been tested at the Galaxy AI data center in Ulanqab, Inner Mongolia, China, since August this year. The system is designed to offer a simpler and more efficient power architecture, supporting higher computing density.
What this means in practice
The system eliminates multiple power-conversion stages by directly converting power from 10kV medium-voltage AC to an 800V DC bus, boosting efficiency and reducing the size of power conversion equipment. It includes a stable solid-state transformer (SST) for conversion, battery storage for second-scale power support and minute-scale backup, and millisecond-level coordination between SST and storage to manage GPU load fluctuations. The system also supports higher-density AI racks and integrates with renewable energy sources and storage. The AI-driven power management provided by the Dubhe controller balances power supply and computing demand, reducing the need for copper and other cabling.
Limitations and availability
The Dubhe tech system is currently in use at the Galaxy AI data center, which plans to scale to 3GW capacity and eventually support up to one million AI accelerators. Envision Energy also intends to roll out the 800V DC technology at its Mission Gobi initiative, targeting 5GW of green AI data center capacity in desert regions by 2030. The supplied announcement does not specify the exact performance benchmarks or independent testing results.
