Economics
Capex, BOM cross-check, tariffs and payback
Pick a scheme first — then this column can calculate
This column runs the real engine on your project scheme, and there is none yet — that is why no calculation buttons are shown here (they are not broken). Start with any of the ways below; the fastest is the built-in example (one click, real parameters).
10 kV incoming (200 MVA short-circuit level) → 1250 kVA transformer (Dyn11) → LV main switchboard → busbar → 5 feeders plus a fire/emergency ATS branch. 1000 kW calculated load, cosφ 0.85, power-factor target 0.95.
Load the real example scheme and start calculating →The scheme and its parameters go straight into your browser; replace the data with your own at any time.
Calculator mode computes the few outputs that only depend on parameters you type in yourself. Anything that genuinely needs the whole system (full-network load flow, coupling with other devices) is shown as “needs a scheme” and no number is given.
Calculator mode is not available for this column yet — use one of the ways below.
Nothing is pre-filled and nothing is invented: leave a required field empty and the result area says “unavailable”.
In the studio, place devices, wire them and pick models — that becomes your project scheme (drawings / BOM / report can be exported).
Open the studio →Use the chat bubble bottom-right, or Contact us — we will set the example to your site parameters.
Note: every number comes from the engine. With no scheme, nothing is invented here.
Frequently asked questions
- What can this calculator do?
- This page collects the money results of a scheme: what it costs, what it saves and when it pays back. The priced bill of materials comes from the configurator engine — the same call the configurator page makes — so item, model, specification, quantity, unit price and subtotal are the engine result for your input, together with the automatic cross-checks. The industry load profile you pick (general, hospital, data centre, two- or three-shift factory, commercial building or charging station) drives the EMS and demand studies, and the tariff region or your own $/kWh figures set the running cost, so dispatch, demand and payback follow immediately. Typical uses: turning a technical scheme into a quotable number, comparing tariff structures, and documenting the payback of an efficiency or storage measure.
- Why can the quote and the technical numbers not drift apart?
- Because the bill of materials, the losses and the life-cycle cost all come from the same engine run: the loss-allocation report is reconciled to the load-flow solution, and the loss model follows IEC 60076-1 / IEC 60364-5-52 practice with transformer losses split into no-load P0 and load loss Pk×(S/Sn)². The reconciliation also discloses what is not modelled — capacitor dielectric loss, reactor loss, busbar contact resistance and harmonic extra loss.
- What decides the priced BOM?
- The configurator input: design basis, distribution, special conditions, plus the transformer type and capacity, MV/LV switchgear and circuit count, compensation, secondary tier and site conditions. Each of them adds line items and can change the standard capacity that is selected — which is why the price moves with the technical choices rather than being an independent cost estimate.