Flexibility
Compute flexes. The host stays on.
Flexibility-as-a-Service — paid on stand-by, paid on activation and paid while Compute is running.
Use cases
At generation. At the mill.
Hydro. Mill. Spare connection. Kelvin as operator. Nine lines.
-
Hydro
Hydro, geothermal, solar & wind
Fully renewable generation. Compute behind the meter absorbs spill. Curtailment in full on Energy.
The host keeps generating.
-
Mill
Industry cannot pause.
Sawmills, pulp, drying, kilns. Unused connection becomes interruptible Compute.
Checkpoint and resume, not a mill shutdown. Heat follows the load — Thermal.
-
Spare
Spare connection
A connection that would sit idle — including beside a battery — becomes a load that earns Compute between calls.
See Compute vs batteries.
-
Operator
Compute operator
Kelvin runs Flexbox, controller, meters and Compute. Flexibility-as-a-Service.
See the service and Compute.
-
Lines
Nine revenue lines against one.
Compute, grid services, Thermal/Heat and mitigation run together. Modular. Surplus Energy. Low grid-load. Turn-key.
No single stream has to carry the site.
Fully renewable at generation. Reliable because Compute flexes — not because the host pauses.
The service
You keep the mill. Kelvin runs the Compute.
Every large load needs this. Almost none of them can build it.
-
01
You keep operations
Core operations stay yours. Unused connection capacity can be the interruptible megawatt.
-
02
Flexbox, controller, meters
Hardware, software, infrastructure — with the Compute.
-
03
Not a bid screen
Kelvin brings the load. Grid signal → the load moves in <0.7 s → the host stays on.
-
04
A clear event log
Pocket first, then metering and a clear event log. Curtailment at generation is on Energy.
How it pays
Stand-by. Activation. Compute running.
Flexibility is the product. At high prices the load curtails and the reserve is sold — the spike becomes revenue.
-
01
Stand-by
Availability payments. The unit is ready to move.
-
02
Activation
Paid when the load moves. Dispatch <0.7 s. Activation just pauses Compute — no cycle penalty.
-
03
While Compute is running
The baseline whenever the unit is running. Compute keeps earning whenever the grid doesn’t call.
Signal in. Settlement out.
One service from the pocket to settlement.
Qualification, signal, dispatch, metering. System operators pay a premium for fast, controllable load. Built for grid-connected or co-located pads — LV or MV, behind the meter.
Compute Flexibility vs Battery Flexibility
Batteries store Energy. Compute earns while it flexes.
Dual revenue, continuous dispatch, no cycle wear.
| Criterion | Compute Flexibility | Battery storage (BESS) |
|---|---|---|
| Upfront cost | Near-zero marginal cost — servers already deployed | €200–500k per MWh of capacity (indicative) |
| Cycle degradation | Zero — servers dispatch without wearing out | Capacity reduces with every activation |
| Duration | Unlimited — servers run continuously, around the clock | Fixed Energy reservoir; duration is capped |
| Recovery | None — assets available immediately after each dispatch | Downtime required between activations |
| Risk | No chemical storage, no associated hazards | Fire and thermal-runaway risk with chemical storage |
| Revenue | Compute + grid services, running simultaneously | Grid services only |
Compute wins on every row.
Optional: Compute on a battery’s existing connection. Both qualify independently; adding a Flexbox does not reduce the battery’s available reserve. Fewer battery cycles. See Energy.
Markets
Built for FCR-D.
Primary Nordic energy markets. FCR-D is the sub-second containment; aFRR follows; mFRR is longer, and sits on checkpointable batch.
Faster containment (FFR) is the same sub-second class the unit is built for.
FCR-D — built for.
Why it holds
It’s a Flexibility problem — not a wire problem.
Surplus is switched off because the load cannot move. Heat rides along.
-
01
Milliseconds, not minutes
Frequency needs a response in milliseconds. Interruptible Compute sheds on firmware signal — first off, first on. The Flexbox is built to move in <0.7 s.
-
02
A pre-tested unit
On-site controller and industrial-grade smart meters delivered as a single, pre-tested unit with the Compute. Kelvin software: control · dispatch · monitoring.
-
03
The cheapest megawatt to switch off
Interruptible Compute is the load that can switch off. Batch pauses at a checkpoint. The host never notices. See Compute.
The fleet
Not a building — a control system
Aggregated sites dispatch as one.
Transmission is a multi-year build; a coordinated fleet dispatches in seconds. Built to integrate with grid operators. Market to machine: control, dispatch, monitoring.