UBS Expert Call: 800V DC Power Architecture Accelerates Adoption in Data Centers

Overview

This research note is a transcript of an expert call published by UBS on May 13, 2026. It documents a conference call organized by UBS’s Energy & Industrials team, focusing on the '800-volt DC (800 V DC) power delivery pathway' and examining the technology's application prospects along the full chain from power source to graphics processing units (GPUs). The core conclusion highlights that adoption of the 800V DC architecture in data centers is accelerating—faster than previously anticipated—and is seen as a key technological shift for improving energy efficiency and simplifying infrastructure.

Core views

Technological Shift and Accelerated Adoption: The report indicates that 800V DC power architecture is becoming a central trend in data center power systems. Compared with traditional alternating current (AC) or low-voltage DC systems, 800V DC significantly reduces the number of energy conversion stages, enhances overall efficiency, and lowers infrastructure complexity and lifecycle costs. Experts believe that with the explosive growth in AI computing demand, conventional power delivery methods are hitting bottlenecks, and the adoption of 800V DC architecture is accelerating—even surpassing earlier market expectations. Evolution of Materials and Components: On the hardware front, the call explored the evolution of power electronics design. The expert shared insights comparing wide-bandgap semiconductors—silicon carbide (SiC) and gallium nitride (GaN)—against traditional silicon (Si). High-voltage DC architectures impose higher demands on power components, and wide-bandgap semiconductors are emerging as critical enablers in 800V DC systems due to their superior performance at high frequencies and efficiencies. Additionally, solid-state transformer (SST) topologies and battery energy storage system (BESS) internal architectures are also aligning toward the 800V DC standard. Expert Background and Credibility: The featured speaker was Suvajit Mukherjee, a Chief Technology Officer with approximately 20 years of experience in power electronics and inverter systems, having held roles at Schneider Electric, Rolls-Royce, and Emerson. He possesses deep expertise in defining architectures for high-voltage DC and AC power systems and has directly contributed to the design of 800V DC internal architectures, BESS, and solid-state transformer topologies. His perspectives reflect cutting-edge industry technical judgments.

Analysis framework

UBS employed an 'expert interview + technical dissection' analytical approach. First, by inviting a CTO-level expert with deep industry experience, the analysis started from fundamental technical logic to explain the physical advantages of 800V DC architecture (e.g., efficiency, cost, space footprint). Second, it linked these advantages to the urgent need for high-density power in modern data centers—especially AI compute facilities—to infer an accelerating commercialization trend. Finally, by comparing the performance of different semiconductor materials (SiC/GaN vs. Si), the report identified upstream segments in the supply chain most likely to benefit. This bottom-up technical framework helps investors understand the drivers behind hardware iteration.

Methodology notes

• Industry/Sector Analysis Framework

  Technology Substitution and Penetration Rate Analysis

  The report assesses the penetration inflection point of a new technology (800V DC) in a specific application (data centers) by analyzing its efficiency advantages and evolving cost structure relative to legacy technologies (traditional AC/low-voltage DC). This is a common paradigm in tech hardware analysis: when a new technology reaches a performance threshold while maintaining cost feasibility, substitution accelerates non-linearly.

Impact & implications

For the industry, widespread adoption of 800V DC architecture implies a major restructuring of data center power infrastructure. This benefits upstream suppliers of high-voltage DC power modules, solid-state transformers, and SiC/GaN power devices. While utilities and midstream energy companies have limited direct exposure, the optimization of data center energy consumption profiles could influence long-term electricity demand forecasting models. The report notes that this trend is transitioning from proof-of-concept to large-scale deployment, and supply chain participants should closely monitor the pace of technical standardization.

What to watch

• Actual deployment progress of 800V DC architecture among large data center customers
• Cost reduction trajectories of silicon carbide (SiC) and gallium nitride (GaN) components in 800V systems
• Technical certifications and order wins by relevant power electronics equipment suppliers