INDUSTRIES / TELECOM & 5G
One hut, two voltages: -48 VDC plant meets 54 V AI.
Transport networks still run on -48 VDC plant while the AI room next door wants 54 V accelerator rails. Outdoor and unmanned cabinets qualify components from -40 to 65°C, and backup philosophy splits in two: 4–8 hour strings for the plant, second-scale bridging for GPUs.
PLANT BASELINE
| Legacy bus | -48 VDC rectifier plant, decades of spares |
|---|---|
| AI add-on | 54 V / 240 V / 336 V accelerator cages |
| Ambient | -40 to 65°C component qualification |
| Backup split | 4–8 h strings vs second-scale bridging |
| Lithium export | UN38.3 + MSDS + PI965/PI966 · sea Class 9 |
THE TWO-VOLTAGE SITE
Your rectifier plant speaks -48 V. Your GPUs do not.
The 5G buildout put AI compute inside the telecom estate, and the power chain inherited a translation problem.
| Friction | The numbers | Operational impact |
|---|---|---|
| Voltage mix | -48 VDC plant beside 54 V AI cages | Two power chains and two spares strategies inside one site |
| Temperature | -40 to 65°C at outdoor and unmanned huts | Office-grade caps and fans drift out of spec long before the radio does |
| Backup logic | 4–8 h battery strings vs second-scale rides | String-sizing for GPU swings wastes CAPEX; a rack BBU sized for 8 h is not a product |
| Lithium logistics | UN38.3, PI965/PI966, sea Class 9, ≤30% SoC shipping state | A BBU without the document chain stalls at the first border |
VOLTFAB RESPONSE
Keep the plant. Add a wide-temperature AI chain.
The -48 VDC plant keeps running exactly as built. Next to it, a 54 V CRPS shelf converts for the AI cage at up to 96% Titanium efficiency with N+N hot-swap; a 51.2 V LFP BBU bridges the seconds-to-minutes gap until generators settle; and where ambient swings from -40 to 65°C, hybrid LIC supercapacitor modules hold their millisecond response across the full range. Every lithium shipment leaves with UN38.3, MSDS and PI965/PI966 packing — BBU programs start at 50 sets on 30–45 day builds.
ORDERING BASELINE
What a telecom planner asks for first.
Order codes and compliance lines that decide a telecom power award.
| Item | Planner requirement | VoltFab delivered value |
|---|---|---|
| Ambient class | -40 to 65°C qualified buffering and drive | Hybrid LIC supercap modules rated across the full range |
| AI conversion | 54 V direct-to-rail, N+N redundancy | CRPS/mCRPS ladder, Titanium 96% @50% load |
| Bridging | Seconds-to-minutes ride-through | 51.2 V LFP BBU, UL 1973 / 9540A path, CAN/PMBus |
| Legacy coexistence | No replanting of -48 VDC | Boundary drawn at the breaker; rectifier plant untouched |
| Export docs | Border-proof lithium chain | UN38.3 + MSDS + PI965/PI966, ≤30% SoC sea guidance |
| Program | Carrier-paced volumes | BBU MOQ 50 sets, 30–45 days; CRPS MOQ 100 pcs |
RECOMMENDED LINES
Three lines carry the telecom brief.
CRPS Server PSU
54 V direct-to-rail outputs for GPU shelves at 96% Titanium. N+N hot-swap, 100% burn-in, MOQ 100 pcs.
Explore →BBU Battery Backup
51.2 V LFP bridging for ORv3-style shelves. UL 1973/9540A path, UN38.3 export docs, MOQ 50 sets.
Explore →Supercapacitor Modules
48 V hybrid LIC holds millisecond response from -40 to 65°C. 100% DoD, ~15-year service life.
Explore →FAQ
Telecom power questions we field weekly.
Can -48 V and 54 V really share one site without replanting?
Which product covers the 4–8 hour backup expectation?
How do lithium BBUs clear international shipping?
TELECOM & 5G PROGRAM
