Installing a compact DC charger is three packages of professional work: a base to stand on, cabling to feed it, and a commissioning that proves it works. None of it is a DIY job, and the dimensions do not belong in a blog post — they come from the installer’s design for your ground and supply. What the site owner controls is the checking: what to verify in each package, and what paperwork to file before the installer leaves.
Key Takeaways
- Base, cabling and commissioning are three professional packages; the site owner’s job is checks and records, never the tools.
- No base dimensions or cable sizes live in an article — they come from the installer’s design for your ground and supply.
- Commissioning closes with four records: unit identity, a first DC session, a verified platform link, and the sign-off file.
- Confirm the fitted DC connector in writing at order stage; install day is too late to discover a mismatch.
Package One: The Base
The EV-RHDC30K-L is a floor-standing unit, so the base is the installer’s — or the civil contractor’s — specification, matched to the charger and to your ground. No dimensions, concrete grades or anchor details appear here — they arrive with the installer’s design. The owner’s checks are simpler and they matter:
- The position matches the agreed site plan — the connector serves its bay, and the unit stands where vehicles and doors do not threaten it.
- The finished base matches the drawing you were given, at the position and level the design states.
- You keep the as-built drawing. The next contractor who digs, drains or extends the car park will ask for it.
Package Two: The Cabling
The feed is the installer’s design end to end: the route, the cable and the protection are professional calls, made from the unit’s nameplate rating and your supply — an earlier article in this series covers what drives commercial installation cost, and the supply questions sit upstream of this package. Nothing here is an instruction to copy. The owner’s side is verification and records: the installed work matches the design you approved; the new circuit is identified at the distribution board — which board, which protective device — so the next electrician finds it in minutes, not by tracing; and the installer’s test certificates are in your hands, not promised by email.
Package Three: Commissioning — the Records That Prove It
Commissioning is where an installation becomes evidence. Four records close the project, and each one earns its place in the file:
| Record | What it proves | When you will want it |
|---|---|---|
| Unit identity — model and serial number | Which physical charger you own | Warranty and support: the unit carries a 3-year standard warranty |
| A completed first DC session, with energy and duration | The station delivers DC to a car, not just power on a screen | The baseline every later fault report is compared against |
| Platform link verified — the session visible in the back office | OCPP 1.6J reporting works from day one | The first driver bill, fleet report or utilisation review |
| Installer sign-off and the handover file — manual, warranty papers, certificates | The project is closed, not just finished | Insurance, a site sale, or the next contractor’s first visit |
The Station Being Commissioned
The unit at the centre of the file is the EV-RHDC30K-L: a floor-standing DC charger rated at 22 kW on its product page, single connector, LCD, IP54 enclosure, OCPP 1.6J. One honest gap to close at order stage, not on install day: the listing does not name the DC connector standard, so the fitted connector is confirmed in writing against the vehicles the station will serve — a commissioning session cannot fix the wrong connector. Site selection done well makes all three packages cheaper; done late, it makes each of them harder.
Frequently Asked Questions
Can we install it ourselves to save money?
No. Base works, cabling and commissioning are licensed professionals’ work, and the savings would be spent again the first time a fault, an insurer or a buyer asks for certificates. The owner’s contribution is decisions, checks and the file.
How big does the base need to be?
No figure is given here, deliberately: the base is designed by your installer for this unit and your ground conditions. What you should hold at the end is not a number from an article but the as-built drawing of the base that was actually poured.
What should we check before signing off?
Two proofs. A recorded first DC session — energy delivered over a real charge — and the same session visible on your charging platform. The first proves delivery, the second proves connectivity; both are five-minute checks on the day and expensive mysteries a month later.
Related Reading
- How Much Does It Cost to Install a Commercial EV Charging Station?
- Where to Install an EV Charging Station: Site Selection Guide
- How Do DC Fast Chargers Work?
