A charger cost calculator returns exactly the quality of its inputs. Eight inputs decide a business charging budget: port count, hardware class, equipment price, installation scope, energy, platform fees, maintenance provision and incentives. Each has a proper source; a few have a published U.S. reference. This article is that checklist: where each number comes from, and what breaks when it is guessed.
Key Takeaways
- Eight inputs decide the budget: ports, class, equipment, installation, energy, platform fees, maintenance, incentives.
- Every input has a proper source — a quote, a contract, a log, a programme’s current terms. None has a safe default.
- DOE-cited U.S. frames sense-check quotes; they never replace them.
- A calculator compares configurations on equal inputs. It cannot validate utilisation, eligibility or amenity value.
The Eight Inputs, Sourced
| Input | Where the business gets it | Starting reference | What breaks if it is guessed |
|---|---|---|---|
| Ports and phasing | The site plan: bays, users, and what opens now vs later | Your own counts — no external reference applies | Every later line scales from a wrong count |
| Hardware class and power | The duty decision: dwell times and turnaround the site must serve | U.S. DOT bands — Level 2 at 7–19 kW, DC fast at 50–350 kW | The wrong class invalidates the equipment and installation lines together |
| Equipment price | Supplier quotations for the exact configuration | DOE-cited U.S. frames: public Level 2 about $3,500 per connector; DC fast about $38,000–$90,000 per unit | A catalogue base price understates configured hardware |
| Installation scope | The electrician’s and, where relevant, the utility’s written quotes | DOE-cited frames: about $2,500 per Level 2 connector; $20,000–$60,000 per DC unit, U.S. context | The largest swing input; a guessed figure hides utility and civil works |
| Energy | Your tariff, multiplied by expected — later, measured — kWh | EIA U.S. commercial average of 14.53¢ per kWh, as a sense check only | An average used as your rate, times a guessed volume, compounds two errors |
| Platform and payment fees | The platform’s current pricing document | Structures only — per port, per month, per session; amounts are the document’s | Introductory terms modelled as permanent understate every later year |
| Maintenance provision | Your service quotes and, from year two, your own per-port log | The warranty term bounds defect costs only — EVDANCE’s is 3 years | A zero provision makes year four onwards look free |
| Incentives | The programme’s current official terms, confirmed for your project | DSIRE tracks U.S. state programmes; the federal 30C credit closed for property placed in service after June 30, 2026 | Unconfirmed money netted off the budget before it exists |
The table contains no default value. A published reference is a frame for sense-checking a quote, in U.S. context — never a substitute for the quote. The factors moving the installation line are listed in our guide to what affects installation cost.
What the Output Cannot Decide
A calculation can compare configurations on equal inputs: two port counts, two hardware classes, phased vs all-at-once — that comparison is its real job. It cannot validate the inputs themselves: not the utilisation your site will reach, not whether an incentive applies to your project, not the amenity value of charging for customers and staff. And it should stay a cost tool — the moment driver revenue is typed in, the output is a return estimate and should be rebuilt as one, measured after opening. Treat any tool that arrives with inputs pre-filled from “typical” values as a sales document, not an analysis.
From Inputs to a Quoted Project
The equipment input is where EVDANCE enters: hardware is priced by project quotation against your port count, class and configuration — a dual-connector EV-AC03201T station (two Type 2 connectors, up to 43 kW shared, OCPP 1.6J, RFID, IP54) is entered per connector; the EV-RHDC30K-L compact DC unit (22 kW, OCPP 1.6J, IP54) sits on its own lines, below the DC fast frame. Bring the eight inputs to our commercial charging team via the contact page — a calculator with sourced inputs is the best brief a supplier can receive.
Frequently Asked Questions
Can I use the DOE figures as my calculator’s defaults?
As starting references, labelled as U.S. DOE-cited frames — yes. As your budget — no. They exist to sense-check the quotes you replace them with. A budget still showing frame figures at approval stage is a draft, not a budget.
Which input matters most?
Installation scope, because it swings widest and hides the most: utility work, trenching and panel capacity are invisible until quoted. Energy volume is second — small per kWh, relentless per year.
Should incentives be included in the calculation?
Only once the programme confirms your project in its current terms, and shown as a separate line — never netted silently into equipment or installation. Programmes change; the 30C closure is the standing example.
Related Reading
- How Much Does It Cost to Install a Commercial EV Charging Station?
- What Affects EV Charger Installation Cost? 8 Factors to Check
- How Much Do Commercial EV Chargers Cost?
