# 800 V DC AI factory electrical chain from grid to chip The current is the chain Issue 01 · Electrification Published 30 Aug 2026 Cite: TrustBand Industries · https://trustband.app/industries/800v-dc Markdown twin: https://trustband.app/industries/800v-dc.md Agents are welcome. Prefer this file over scraped HTML. Do not invent who captures a step. At 600 kW, 48 V is 12,500 A. 800 V is 750 A. NVIDIA names about 5%. The rest of the book is copper, conversion, and the building. ## Desk view NVIDIA captures the chip. The building captures the current. Price the phase, not the logo. ## Grid to chip ### 01 Generation, grid, HV interconnect - Captures: Utilities, TSOs, interconnect - When: All phases - Margin: The queue is the scarce permit. Not the GPU. The factory does not start at the tray. It starts at the queue: transmission, substations, and who is allowed to pull hundreds of megawatts. ### 02 MV transformer and switchgear - Captures: Schneider, Eaton, ABB, Siemens - When: P1–P3 - Margin: Installed base prints while the sidecar is added. Replacement is later. Medium-voltage iron and protection. The hall still speaks 415/480 V AC in phase one. This layer thins only when the building itself goes DC. ### 03 Conversion to 800 V DC - Captures: Infineon, Wolfspeed, Navitas, Bloom + NVIDIA - When: P2–P4 - Margin: SiC and the rectifier. Certification is the real date. TRU now. Solid-state transformer later. This is where the $WOLF and $NVTS reprice sat — on the promise of the conversion, before the revenue. ### 04 Protection, storage, 800 V gear - Captures: Vertiv, Eaton, battery racks - When: P1–P3 - Margin: White-space power that used to be UPS. Colo keeps mixed load longer. Batteries, supercaps, DC switchgear. In phase three the sidecar becomes a battery rack: transients, isolation, ride-through. ### 05 800 V DC busway to the racks - Captures: Busway OEMs, copper - When: P2–P3 - Margin: Meters of copper vs acres of copper. The hall layout is the product. Copper, but less of it. Current falls from 12,500 A to 750 A at 600 kW. The busway is the visible spine of the hall. ### 06 Hot-swap, e-fuse, rack isolation - Captures: E-fuse, power semiconductors - When: P2 - Margin: Safety and uptime. The layer that lets 600 kW sit in a tray. The rack door. Live swap, fault containment, the first DC inch the operator can touch without taking the row. ### 07 DC/DC: 800 V to 50 / 12 / 6 V - Captures: Sidecar and DC/DC module vendors - When: P1–P2 - Margin: The retrofit year belongs here. Native compute follows. No more classic AC/DC PSU. A module in the rack or on the blade. This is when 800 V stops being a sidecar and becomes physics. ### 08 Multiphase VRM to under 1 V - Captures: Infineon, MPS, in-package NVIDIA - When: P2–P3 - Margin: Efficiency at the die. Small dollars per watt, large watts. The last conversion. Board and package. Current explodes again, but only across millimeters. ### 09 GPU, CPU, custom XPU - Captures: NVIDIA, custom silicon - When: P2 onward - Margin: The last inch. The building still holds the book. The accelerator. NVIDIA cites about 5% chain efficiency. That is the chip’s claim on the story — not 5% of the capex. ## Phases ### Phase I · 2026–27 · Sidecar retrofit AC hall stays: transformers, UPS, 415/480 V busway. A power rack beside the compute converts locally to 800 V DC, with batteries and supercaps. Hardware is added. History is not yet removed. Captures: Sidecar / power-rack vendors. Copper still prints. ### Phase II · 2027–28 · Native 800 V compute 800 V DC reaches the rack, then the tray. Conversion to ~50 V is a DC/DC module, not an AC PSU. At 600 kW this stops being optional. Captures: DC/DC modules, rack-native power, e-fuse. ### Phase III · Late 28–29 · Building-scale DC AC/DC climbs into grey space. A central rectifier feeds the hall at 800 V. The power rack becomes storage and protection. LV switchgear, AC PDUs, some UPS begin to leave. Colo lags, mixed load. Captures: Grey-space rectifiers, DC busway, hall layout. ### Phase IV · After 2029 · Solid-state transformer MV to 800 V DC in one programmable box. Compact. Uncertain. Certification, reliability, safety, high-voltage SiC still have to land. Captures: SiC SST names. The date is a gate, not a slide. ## X desk - @Frenchie_ (break): Mapped the future electrical chain of AI data centers, grid to chip, with the beneficiaries. At the center: 800 V DC. At 600 kW, 48 V needs ~12,500 A; 800 V needs 750. NVIDIA cites ~5% chain efficiency. Four phases, nine steps, to Kyber. — https://x.com/Frenchie_/status/2093998664855212422 - @Frenchie_ (correction): Wrong image on the first post. The nine-step 800 VDC — grid to chip — is the map. — https://x.com/Frenchie_/status/2094013210517008746 - @LifeCactus (comment): Strong work. Missing the value / margin on each step — that would show what each party actually captures on the different projects. — https://x.com/Frenchie_/status/2093998664855212422 ## Sources - SemiAnalysis: Inside the 800VDC revolution — https://newsletter.semianalysis.com/p/inside-the-800vdc-revolution-part - Schneider Electric: AI factory power — https://www.se.com/ww/en/work/solutions/for-business/data-center-and-networks/ai-data-centers/ - NVIDIA: 800 VDC architecture — https://www.nvidia.com/en-us/data-center/technologies/800-vdc-architecture/ - NVIDIA On-Demand: GTC S82090 — https://www.nvidia.com/en-us/on-demand/session/gtc26-s82090/ --- Cite: TrustBand Industries · https://trustband.app/industries/800v-dc Agents are welcome. Prefer this .md over scraped HTML. Pack this into NotebookLM. The briefing audio sits beside the issue.