As 800V DC Rack Power Gains Momentum, Redundancy and Efficiency Still Define the Power Supply 2026-10-08
As power density in AI data center racks keeps climbing, the industry is moving toward 800V DC rack power architectures. For servers that rely on redundant power, the redundancy, efficiency, and serviceability of the power supply still directly affect compute stability. This article outlines the selection points and introduces the power supply line published by ALT Group.
Rack Power Architecture Is Changing as Electricity Demand Climbs
According to an October 5, 2026 announcement from Microchip Technology and Navitas Semiconductor, the industry is shifting toward 800V DC rack power architectures as AI data centers scale up high-power GPU clusters, aiming to improve distribution efficiency and power density. The related reference design is scheduled to be shown at the 2026 OCP Global Summit, October 12–15.
Rising electricity demand is the pressure behind the shift. The International Energy Agency (IEA), in its Energy and AI report released April 10, 2025, projects that global data center electricity consumption will grow from about 415 TWh in 2024 to about 945 TWh by 2030, with AI the most significant driver.
While Architectures Evolve, the Power Supply Remains the First Line
800V DC is a direction for next-generation high-power racks, and the scope and timing of adoption still depend on the platform and the site. For servers that use redundant power supplies, a gap in redundancy or monitoring at this layer means a single module fault can affect the whole server. Poor conversion efficiency turns power into heat, which adds to the cooling load.
When selecting a power supply, four points are worth checking first: input conditions and maximum output, redundancy architecture, efficiency certification, and monitoring and maintenance features.
ALT Group Power Supplies: A Redundant Line From 900W to 3000W
ALT Group currently lists eight redundant power supplies at 900W, 1000W, 1200W, 1600W, 2000W, 2200W, 2600W, and 3000W, in both Dual Input (AC/DC-DC) and AC-DC models. The 3000W Dual Input (AC/DC-DC) Redundant model, as published, serves as the example below:
- Maximum output: 3000W @ 200–240Vac / 240Vdc; 2880W @ 200–207Vac — available output depends on input voltage, so check actual input conditions when planning power.
- Input type: Dual Input (AC/DC-DC) — described as a power supply with AC/DC dual-input redundancy.
- Dimensions: 265 × 73.5 × 40 mm (D × W × H) — confirm the size fits before adoption.
- Efficiency certification: 80 PLUS Titanium — a high-efficiency tier in the 80 PLUS program.
- Redundancy: N+1 Redundant — an additional module is configured.
- Monitoring and maintenance: PMBus 1.2, fully digital design, Black Box Recorder, hot-swappable, in-system firmware upload.
For output power, input conditions, and features of other models, please refer to the individual product specifications.
Perspective
Our view is that the evolution of rack power architecture does not make power design less important. It makes efficiency, redundancy, and monitorability specifications that need to be defined earlier. Clarifying input voltage conditions and maintenance workflow first, then comparing power ratings, usually reduces adoption risk more than simply chasing the highest wattage.
As AI deployments scale, power will remain a core topic in data center planning. ALT Group continues to offer power supplies from 900W to 3000W.
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