Compute

Compute on surplus Energy

AI training and batch inference — interruptible HPC on a Flexbox at the surplus. Checkpoint in the contract.

Visualization of a Kelvin Flexbox: a forest-green 40 ft ISO container with a copper K on the double doors, horizontal louvers and a keypad, on gravel among pines. Not a photograph of an operating site.
VisualizationKelvin Flexbox — 40 ft ISO

Workloads

Interruptible loads on a Flexbox at the surplus.

  1. AI

    Training and batch.

    The load Kelvin is built for is interruptible AI.

    Long runs that write a resume point. Queued inference that can wait a minute.

  2. HPC

    Simulation and rendering.

    Same interruptible contract — jobs that can wait.

    High-density runs and framesets that queue. Pause inside the window and resume.

  3. Cloud

    Batch and burst.

    Capacity is on request.

    Burst that can pause. Queued jobs that can wait.

  4. Edge

    The module at the source.

    Behind the meter at generation.

    A Flexbox at the source. Extra grid load stays low.

  5. Bitcoin

    A load that can pause.

    Not a treasury. Not a mining SKU.

    One pause-able load. Same pause-and-resume as training.

Why it holds

The site is the jurisdiction.

Sit the job at the surplus — behind the meter or spare industrial.

  1. 01

    Local

    The surplus is local. So is the job. Energy.

    Locked-in surplus cannot be copied without that Energy.

  2. 02

    Behind the meter

    Spare industrial or behind the meter at generation.

    Extra grid load stays low.

  3. 03

    Based in Stockholm.

    Kelvin Compute AB. First plots in Hälsingland stay Plot.

    Postal c/o only.

  4. 04

    Electrons first.

    Compute, Flexibility-as-a-Service, and Thermal/Heat.

    One connection. Three public products.

  5. 05

    Computational sovereignty.

    The job sits at the surplus. Not a remote campus on a queued feeder.

    The site is the jurisdiction.

  6. 06

    Weeks against years.

    Pad, connection and permits. Cadence, not an SLA.

    Checkpoint is in the contract.

The contract

Four load tiers. One dispatchable site.

Checkpointable means the job writes a resume point. When the grid calls, the job pauses inside the contract window and comes back.

02

Batch

Async AI and queued inference. Pause inside the contract window. Cost of flexing is zero if the window is respected.

Interruption windows are contracted per tenant — not a published Kelvin SLA. See Flexibility-as-a-Service.

The rack

Flexbox is the rack for that load

A module at the surplus. Hardware, software, infrastructure — Compute, Flexibility and Thermal/Heat.

  1. Power

    ≈1 MW / 40 ft

    Operating power tracks loaded server draw. Site-specific values confirmed in engineering.

  2. Compute

    4 racks · 336

    Up to 336 servers. Air or liquid in the same 40 ft ISO. Stackable two-high on the same pad (≈2 MW / 672). 20 ft on request.

  3. Dispatch

    <0.7 s

    Built to start, pause and resume in well under a second. Flexibility-as-a-Service is in the contract.

  4. Connect

    LV or MV

    Behind the meter or grid-connected. Heat capture designed in — Thermal.

Full stack at the surplus

The workload

Interruptible batch: training, batch inference, simulation, rendering.

Kelvin brings

Flexbox. Compute, Flexibility, Thermal/Heat. Cooling, power, ops, software, hardware, infrastructure. Air or liquid in the same 40 ft ISO. Control, dispatch, monitoring.

Not always-on colo. See Flexibility.

Email Kelvin

Cooling

Air. Liquid. Closed-loop.

The Flexbox packages high-density servers and forced-air or liquid cooling in a 40 ft ISO.

Visualization of a Kelvin Flexbox exploded: 4 racks and cooling pulled from a forest-green 40 ft ISO. Not a photograph of an operating site.
VisualizationInternals — 4 racks · up to 336 servers · Heat loop

  1. 01

    Air

    Forced air. Valid on plots that already run air. Heat capture still designed in — the flange ships with the unit, even when the first cooling is air.

  2. 02

    Liquid

    Direct or closed-loop liquid. Liquid cooling is what makes the Heat stream recoverable at usable temperature — toward district supply. See Thermal grade.

  3. 03

    Closed-loop

    Closed-loop on the unit. Four racks, Heat loop, 40 ft ISO. Grid (LV or MV) into the Flexbox; Heat flange out.

On the pad

One module on the pad.

One Flexbox on the pad — Compute, a controller, the Heat flange, the connection.

01 / 04

01 FB-40

Visualization of a Kelvin Flexbox exploded: 4 racks and cooling pulled from a forest-green 40 ft ISO. Not a photograph of an operating site. Visualization of a Kelvin Flexbox close-up: forest-green double doors with a copper K and keypad, and a bank of horizontal louvers. Not a photograph of an operating unit. Visualization of an insulated Heat pipe from a Kelvin Flexbox toward nearby buildings. Capture designed in — not a photograph of an operating site. Visualization of a Kelvin Flexbox: a forest-green 40 ft ISO container with a copper K on the double doors, horizontal louvers and a keypad, on gravel among pines. Not a photograph of an operating site.
VisualizationKelvin Flexbox, exploded. 4 racks.

The Flexbox. 40 ft ISO. ≈1 MW. Four racks — up to 336 servers. Air or liquid in the same box.

Ships as one module. Pre-tested.

  1. 01

    One conversation

    Email is the conversation.

  2. 02

    Pad, connection, permits

    Weeks against years.

  3. 03

    Module at surplus

    A campus waits on a queued feeder. A Flexbox sits where Energy already spills.

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