Capital expenditure modelling
Capital cost built up from the design itself, not scaled off a benchmark. Change the foundation, the turbine or the water depth and watch the whole estimate move.
What CAPEX does
A deterministic, parameter-level model for wind farm construction. Covering seven clear chapters, every input is visible. There are no hidden sheets or locked formulas, ensuring complete transparency and traceability.
Variables such as soil profiles, turbine ratings, and array layouts are intrinsically linked. Adjust one parameter, and the model instantly recalculates steel tonnage, vessel requirements, and installation schedules, revealing the commercial impact of every engineering decision in real time.
Full parameterisation makes evaluating alternatives effortless. Duplicate, edit, and compare saved scenarios to transform static cost estimation into a dynamic, informed optioneering process.
Live · Demonstration project
£1,196m
Total capital cost, expected case
Eleven components, and a range of £962m to £1,435m
What you get with CAPEX
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Assumptions in chapters
Every input is a clearly labelled assumption with a unit, validation and an audit history. Easily track completion status and gain an instant overview of project scenarios.
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Scenario management
Name a scenario, duplicate it, change parameters then run the costings. Compare scenarios and clearly track all changes, so the reasons for change live clearly in the project.
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Library-backed inputs
Turbines, foundations, vessels, cable costs and contingency factors are selected from a shared library rather than typed. Technical specifications are from shared records and can be locked, so the model never disagrees with defined assumptions.
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Derived values, computed not copied
Parameters that follow from others are marked as derived and recompute when their source changes. The interface shows you which is which, so nobody spends an afternoon overwriting a value the model was always going to recalculate.
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A change history you can defend
Every edit is recorded — what changed, from what, by whom and when. When an estimate is challenged six months later, the answer is a record rather than a recollection.
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Board-ready results
Cost breakdowns by category, package and year, exportable to Excel and PowerPoint — making board packs and reports always based on the model, rather than being retyped or pasted.
CAPEX in use
Drawn in the product's own interface, and every figure is real: they come from our live Demonstration project — a 288.75 MW floating wind farm in the central North Sea — and its Default Scenario, so anything shown here can be reproduced in front of you. No client or commercial data appears on this page.
The input form, as you would actually meet it
The Foundation and wind turbine chapter of the Default Scenario. Three navigation tiers — the project and scenario pickers across the top, the module rail down the left, the chapter bar above the form — and then the inputs: a grid of cells, each carrying where its value came from.
Foundation and wind turbine
19 of 19 fields answered
Foundation
WTG
The bar down the left of a cell is its state, in a shape as well as a tint: violet for a value the shared library owns, teal for one this scenario has changed. "Was 120.0 m" is what the parameter held before the edit. "Not set on Generic Direct Drive 11.55MW (add it)" is the form saying the turbine record could own this field but does not — which is how an unmanaged input stops being a silent one.
Results lead with the width of the estimate
The CAPEX results page for the same scenario. Optimistic, expected, pessimistic and the range across them come before any breakdown, because the size of the estimate and how wide it is are what a reader is owed first. Below them, one band per component with the expected case ticked on it.
CAPEX Results
View a single scenario or compare up to 3 scenarios side-by-side.
Select scenarios
1 / 3Default Scenario CAPEX Breakdown Analysis
Optimistic
£962m
Expected
£1,196m
Pessimistic
£1,435m
Range
£472m
Cost range by component
Optimistic to Pessimistic Expected
| Component | Optimistic | Expected | Pessimistic | Share |
|---|---|---|---|---|
| Floating substation | £290m | £361m | £433m | 30.2% |
| WTG supply | £226m | £280m | £336m | 23.4% |
| Floater hull | £156m | £194m | £232m | 16.2% |
| Onshore substation | £139m | £173m | £208m | 14.5% |
| Export cable system | £60m | £75m | £90m | 6.3% |
| Floater installation | £33m | £41m | £50m | 3.5% |
| Infield cabling | £26m | £33m | £39m | 2.7% |
| Mooring system | £16m | £20m | £24m | 1.7% |
| Corrosion protection | £13m | £16m | £19m | 1.3% |
| Equipment | £2m | £3m | £3m | 0.2% |
| Construction site | £0.19m | £0.23m | £0.28m | 0.0% |
Optimistic and pessimistic are the model's own other two cases, not a percentage applied to the expected one. A component whose cost is well understood has a narrow band and one that is not has a wide one — which is the reason the page leads with the range rather than a single number.
Twelve components, and what each one is worth
Below the range, the same estimate again as a card per component, with the total and its split in the middle. All three cases are on every card, because how uncertain a component is belongs beside what it costs.
Floating substation
WTG supply
Floater hull
Onshore substation
Export cable system
Floater installation
Total CAPEX
Cost breakdown
Parameters| Component | Expected value | Percentage |
|---|---|---|
| Floating substation | £361m | 30.2% |
| WTG supply | £280m | 23.4% |
| Floater hull | £194m | 16.2% |
| Onshore substation | £173m | 14.5% |
| Export cable system | £75m | 6.3% |
| Floater installation | £41m | 3.5% |
| Total | £1,196m | 100% |
Infield cabling
Mooring system
Corrosion protection
Equipment
Construction site
Project currency set to GBP. Some data sources are USD and were converted at runtime at 0.7470 on 2026-09-20 — with the rate stamped on the result, so a figure quoted with differing exchange rates can be explained.
See it on your own project
Book a demo and we will walk through the module with your numbers, not ours.
More of the toolkit
OPEX
Model the cost of running the farm from the things that actually drive it: agreements, vessels, weather windows, technicians and component failures.
AEP
Calculate the net energy yield from the site location, wind record and turbine choice. Make losses visible within each project scenario.
Pre-FID
Take the engineering case to an investment case: cash flow, LCoE, NPV and IRR built on the CAPEX, OPEX and AEP you already modelled.