THE DATA CENTRE INTERVIEW

The case for 800V DC architecture in high-density AI workloads At the centre of the efficiency argument is a shift in the fundamental architecture of how power is distributed inside a building. Traditional data centre infrastructure converts power multiple times between alternating current and direct current – each conversion introducing losses and requiring bulky physical equipment. The emerging alternative is to keep power in DC form from the point it enters the facility until it reaches the server rack.

ABB’ s research indicates that a DC-based architecture can reduce total energy costs by approximately 9 %. Applied to a gigawatt-scale facility, that figure carries significant weight, both commercially and in terms of the total draw placed on the utility grid.

Within that DC architecture, 800 volts is emerging as the technically and economically optimal distribution voltage for AI applications.

“ Higher voltage allows more power to be transmitted through smaller conductors with lower losses,” Giampiero explains.“ In an AI Factory, 800V DC enables the delivery of massive power blocks directly to the rack while minimising the conversion tax.”

The benefits extend beyond efficiency. At 800V, modern components such as Solid State Transformers and Solid State Breakers operate at their most effective, able to isolate electrical faults in microseconds – a critical capability when protecting AI accelerators that represent

multi-million-dollar investments. The architecture also simplifies procurement. By standardising on components that are engineered to connect quickly, operators can reduce construction timelines by between 30 % and 50 %, a material advantage in a market where speed to capacity is a competitive differentiator.

energy cost reduction from DC-based architecture( ABB)

22 June 2026