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.

Thermodynamic (Kelvin) Compute

Turning waste Energy into High-Performance Compute & Thermal

Hybrid & Modular Compute, Flexibility and Heat. Three products, same megawatt.

Email Kelvin What is Flexbox?

The gap

Compute Flexibility earns while it flexes.

A quarter of Europe’s wasted Energy is trapped in northern Sweden. +41 TWh a year, and rising.

Energy without a buyer

Northern Europe builds Energy faster than demand can take it.

Compute without a place

AI training and batch inference sit behind multi-year queues.

Sweden’s north is spilling cheap power; the south imports expensive.

Kelvin places High-Performance Compute at pockets of Surplus & Excess energy. No extra load on the existing grid — entirely renewable and circular. The grid gets more resilient, digital and kinetic.

Approach

Surplus power in, High-Performance Compute & Heat out.

Behind the meter, without needing to load the grid. Three products, without pause. Compute, Flexibility & Heat.

The host keeps the process.

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. 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 an insulated Heat pipe from a Kelvin Flexbox toward nearby buildings. Siting visualization. Not a live sink. Not a photograph of an operating site.
  • 01

    Power in

    Curtailed wind and solar, hydro in negative-price hours, spare industrial connection. Behind the meter.

  • 02

    Compute

    AI and HPC that can checkpoint. A 40 ft ISO at the source. ≈1 MW.

  • 03

    Heat out

    Heat as an asset, not a side effect — local on site, municipal or district.

The loop

Energy in. Compute, Flexibility & Thermal/Heat out.

The load sits at the surplus.

Energy in

  • Curtailment — wind and solar switched off
  • Hydro surplus — negative-price hours
  • Spare industrial — connection already there

Kelvin Flexbox

  • Full stack at the surplus.
  • Compute, Flexibility and Thermal/Heat on the same pad.
  • 40 ft ISO. ≈1 MW. Air or liquid.

Value out

  • Compute — AI, HPC, Bitcoin, Cloud, Edge, batch inference, can be hybrid, modular & retrofitted to each site.
  • Thermal/Heat — local on site, municipal or district
  • Flexibility — FCR-D, aFRR and mFRR. Primary Nordic energy markets.

  1. 01

    Site at the source

    Sit the load where the surplus already is — behind the meter or spare industrial.

  2. 02

    Flex the load

    Compute pauses so the host stays on.

  3. 03

    Flexibility

    FCR-D, aFRR and mFRR. Primary Nordic energy markets.

  4. 04

    Close the loop

    Every kilowatt of Compute leaves as Heat. Capture is designed in.

Why Kelvin

Three products, on the same megawatt.

The connection earns all three revenues simultaneously.

  1. 01

    Compute

    High-Performance Compute on surplus Energy. The baseline.

  2. 02

    Flexibility-as-a-Service

    Compute flexes instead of the host. The load is built to move — FCR-D, aFRR and mFRR.

  3. 03

    Thermal/Heat

    Capture designed in. Local on site, municipal or district.

The system

What is Flexbox?

One pad. Compute, Flexibility, Heat.

  1. 01 Compute Sits at surplus.
  2. 02 Flexes The host stays on.
  3. 03 Heat out Capture designed in.
  4. 04 Connected Behind the meter.

Unit view

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.
Kelvin Flexbox — door, louvers, Heat-out

Pad

FB-40
Flexbox
CTL
Controller
HEAT
Flange
LV · MV
Connection

How the megawatt pays

Compute
Baseline
Stand-by
Availability
Activation
When it moves
Thermal/Heat
Local or district

vs Battery Flexibility

Batteries store Energy. Compute earns while it flexes.

Multiple revenues, continuous dispatch, no cycle wear.

Compute Flexibility compared with Battery Flexibility. Compute wins on every row.

Compute Flexibility

Earns while it flexes

Upfront
Near-zero marginal cost — servers already deployed
Cycle
Zero — servers dispatch without wearing out
Duration
Unlimited — servers run continuously, around the clock
Recovery
None — assets available immediately after each dispatch
Risk
No chemical storage, no associated hazards
Revenue
Compute + grid services + Thermal/Heat, running simultaneously

Battery Flexibility

Stores Energy

Upfront
€200–500k per MWh of capacity (indicative)
Cycle
Capacity reduces with every activation
Duration
Fixed Energy reservoir; duration is capped
Recovery
Downtime required between activations
Risk
Fire and thermal-runaway risk with chemical storage
Revenue
Grid services only

Compute wins on every row. Compute Flexibility.

Scale

Visualization of a Kelvin Flexbox: a forest-green 40 ft ISO container with a copper K on the double doors. Not a photograph of an operating site. Visualization of two Kelvin Flexbox units stacked at dusk. Not a photograph of an operating site. Visualization of timber-and-glass data halls in a Nordic forest clearing. Siting study, not the product SKU. Not a photograph of an operating site.
Kelvin Flexbox, 40 ft ISO

A valid first step — one module on the pad.

Hosts

01 / 07

01 Industrial

Visualization of a Heat pipe into an unbranded timber mill or drying hall. Site-specific — not a named mill. Not a photograph of an operating site. Visualization of an insulated Heat pipe from a Kelvin Flexbox toward nearby buildings. District Heat offtake — not home Compute. Not a photograph of an operating site. Visualization of timber-and-glass data halls in a Nordic forest clearing. Siting visualization, not the product SKU. Not a photograph of an operating site. Visualization of timber-and-glass data halls in a Nordic forest clearing. Siting visualization, not the product SKU. Not a photograph of an operating site. Visualization of a timber-and-glass hall at the foot of wind turbines in a Nordic clearing. Siting visualization, not the product SKU. Not a photograph of an operating site. Visualization of a timber-and-glass hall at the foot of wind turbines in a Nordic clearing. Siting visualization, not the product SKU. Not a photograph of an operating site. Visualization of a Heat pipe into an unbranded timber mill or drying hall. Site-specific — not a named mill. Not a photograph of an operating site.
Industrial host — load in industry

Local Heat on site — premises and process. The process stays on; Compute flexes.

Who we build with

Energy and hosts first. Then AI, HPC and cloud that can checkpoint. Flexibility in the contract.

Hosts

Workloads

01 / 07

Visualization of a timber-framed hall interior: two aisles of liquid-cooled racks under wood beams. Siting visualization. Not a photograph of an operating site.

Industrial loads

1.0

You stay on. Compute flexes.

Industrial, manufacturing and process loads stay on. Flexibility-as-a-Service absorbs Surplus & Excess energy — local Compute, local Heat, Sovereign AI.

Energy

Visualization of an insulated Heat pipe from a Kelvin Flexbox toward nearby buildings. District Heat offtake — not home Compute. Not a photograph of an operating site.

Heat into the network that already serves buildings and homes.

Residential

2.0

District Heat, not home Compute

Heat into the district network that already serves buildings and homes. A Flexbox can feed that pipe.

Visualization of timber-and-glass data halls in a Nordic forest clearing. Siting visualization, not the product SKU. Not a photograph of an operating site.

Timber halls at generation.

Hydro

3.0

Fully renewable. Made reliable.

Hydro at generation, behind the meter or spare connection. Compute absorbs the spill; the host keeps generating.

Energy

Visualization of timber-and-glass data halls in a Nordic forest clearing. Siting visualization, not the product SKU. Not a photograph of an operating site.

Timber halls. Heat sink next to the pad.

Geothermal

4.0

Generation beside a Heat sink.

Compute behind the meter. Heat designed in.

Thermal

Visualization of a timber-and-glass hall at the foot of wind turbines in a Nordic clearing. Siting visualization, not the product SKU. Not a photograph of an operating site.

Timber hall at generation. Dispatchable adjacency.

Gas

5.0

Dispatchable adjacency

An industrial host with dispatchable adjacency.

Visualization of a timber-and-glass hall at the foot of wind turbines in a Nordic clearing. Siting visualization, not the product SKU. Not a photograph of an operating site.

Timber hall at wind. Surplus at generation.

Solar & wind

6.0

Solar and wind, made reliable

Fully renewable generation. Compute behind the meter absorbs surplus so the Energy is used, not switched off.

Energy

Visualization of a Heat pipe into an unbranded timber mill or drying hall. Site-specific — not a named mill. Not a photograph of an operating site.

Process Heat on an industrial pad.

Manufacturing / process

7.0

Process Heat, sized to the line

Drying, kilns, process. The flange is sized to the line you already run.

Thermal

Visualization of a Kelvin Flexbox: a forest-green 40 ft ISO container with a copper K on the double doors, on gravel among pines. Interruptible training and batch inference. Not a photograph of an operating site.

Kelvin Flexbox — interruptible training and batch inference.

AI

1.0

Training and batch inference

Work that can wait. Checkpoint in the contract.

Compute

Visualization of a timber-framed hall interior: two aisles of liquid-cooled racks under wood beams. Siting visualization for simulation and rendering that can wait. Not a photograph of an operating site.

Racks for simulation and rendering that can wait.

HPC

2.0

Simulation and rendering

Jobs that can wait. The load moves when the grid calls.

Visualization of three timber-and-glass data halls in a Nordic forest clearing at dusk, with solar panels in front and wind turbines behind. Siting visualization, not the product SKU.

Timber halls at dusk. Burst and batch that can pause.

Cloud

3.0

Interruptible batch, not colo

Capacity is on request. Work that can wait.

Visualization of a Compute hall on a fenced pad inside a wind park, at the foot of a turbine. Module at the source, behind the meter. Siting visualization. Not a photograph of an operating site.

Module at the source, behind the meter.

Edge

4.0

The module at the source

Behind the meter, at generation. A 40 ft Flexbox at the source.

Visualization of a Kelvin Flexbox on gravel among pines. Compute that flexes. Not a photograph of an operating site.

Kelvin Flexbox — Compute that flexes.

Bitcoin

5.0

Compute that flexes

Paid on stand-by, paid on activation, paid while active and paid in yield. No matter the market price of Bitcoin, we produce for Production Price.

You bring the pocket. Kelvin brings the rest.

  1. You

    The pocket.

    Location, surplus hours, the connection (behind the meter or spare industrial), a Heat sink if there is one.

  2. Kelvin

    Full-stack.

    Infrastructure. Compute, Hardware, Software, Flexbox. Flexibility-as-a-Service, Thermal/Heat. Operations. Kelvin handles everything.

Compute on surplus

Interruptible HPC. Checkpoint in the contract.

See Compute

Why it holds

No single price, market or machine decides the outcome.

  1. 01

    Compute

    The connection earns Compute between dispatches — interruptible AI training, batch inference, simulation and rendering. Checkpoint is in the contract, so the job pauses and comes back.

    Income a battery cannot print. Kelvin runs the Compute.

  2. 02

    Energy

    Sit behind the meter at hydro, geothermal, solar or wind — or on spare industrial electrical already on the plot.

    Extra grid load stays low. The Energy stays on the plot.

  3. 03

    Thermal

    Thermal/Heat is a product, not CSR. Capture is designed into the Flexbox: local process and premises on site, municipal or district.

    Residential is district Heat only — not a box in a house.

  4. 04

    Curtailment

    Clean Energy is switched off because the load cannot move. We sit on that surplus.

    A module at generation.

  5. 05

    Congestion

    Northern surplus, southern demand. Wires are a multi-year build. A 40 ft module sits at the Energy instead of queueing for a wire.

    The connection is the asset.

  6. 06

    Mitigation

    Batteries store Energy, sit idle, cycle-degrade and earn one stream. Compute earns while it flexes — and heats while it earns.

    No cycle penalty. Multiple revenues on the same connection.

  7. 07

    Cadence

    Pad, connection and permits. Weeks, not a multi-year queue.

    Cadence, not an SLA.

  8. 08

    Nine lines

    Compute plus grid services, Thermal/Heat and mitigation run together. Modular. Surplus Energy. Low grid-load. Turn-key.

    Nine revenue lines against one.

How we start

Two tracks

Energy host or Compute buyer? Reach out.

Energy host

You have surplus

Location, connection, hours, Heat if any. We map the loop and write back.

Email Kelvin

Compute buyer

In need of AI or High-Performance Compute?

Say what has to run — training, batch inference, simulation. We map surplus and Flexibility-as-a-Service. We write back.

Email Kelvin

Questions

Who maintains the unit?

Kelvin runs the Compute — the unit and the cooling. You remain the Energy host: site access, the connection, and the Heat sink where you have one.

How is Flexibility-as-a-Service paid?

Paid on stand-by, on activation, and while Compute is running. See How the megawatt pays and Compute Flexibility.

Why not batteries?

Batteries store Energy. Compute earns while it flexes. Multiple revenues, continuous dispatch, no cycle wear. vs Battery Flexibility.

Retrofit or plug-and-play?

Low-demand retrofit, high-demand plug-and-play.

What happens when Compute pauses?

The load is built to ramp. When the grid is tight or the surplus disappears, jobs checkpoint and the site steps down. Heat follows the load — a paused unit is not a baseload boiler.

Who takes the Heat?

Local on site, municipal or district. We do not take over the network. Thermal.

Why Sweden and the Nordics?

The north spills cheap power; the south imports expensive. Kelvin sits the load at that surplus. Energy.

It’s not a Wires problem. It’s a Flexibility problem. We solve it.

Do we need a new grid connection?

No. Behind the meter, at the surplus. Energy.

Does this only work as a full campus?

No. One Flexbox is a valid first step. Scale.

Is Bitcoin a product?

Compute that flexes. Paid on stand-by, paid on activation, paid while active and paid in yield. No matter the market price of Bitcoin, we produce for Production Price. Bitcoin.

The most Flexible Compute-form and algorithm (SHA256).