EV charging infrastructure explained: components, modes and rules in Luxembourg

EV charging infrastructure is every piece of equipment that carries electricity from the grid to the battery: grid connection, meter, distribution board, protective devices, dedicated circuit, charging point and, usually, back-end software. The charger is only one component, and a properly installed dedicated socket is also charging infrastructure, just a simpler one.

This guide explains, building block by building block, how it works in Luxembourg: the vocabulary, the components, the four charging modes, how the car and the charger talk to each other, power levels, costs and subsidies, who may install what (approved electrician, Creos thresholds), the public Chargy and SuperChargy networks, and the difference between home and workplace. It also shows that a connected charger is not needed to reimburse home charging of a company car: Voltaback, used by more than 200 companies, is a software layer that works on the equipment drivers already have.

Charging infrastructure, charger, charging point: the right words

In Luxembourg's English-speaking business community, you will hear charging infrastructure, charger (or charging station, wallbox) and charging point. The French-language legal texts use "infrastructure de recharge", "borne de charge" and "dispositif de charge"; German speakers say Ladeinfrastruktur, Ladestation and Ladepunkt. In a multilingual company, agree on one set of terms in the car policy so that HR, the fleet manager and the drivers mean the same thing.

• Charging point: where a vehicle plugs in, a socket or connector. A Chargy station, for instance, has two charging points.
• Charger: the device carrying one or more charging points and talking to the car. A wall-mounted charger is a wallbox; a free-standing one is a pedestal.
• Charging infrastructure: the whole system, from grid connection to the software that runs the chargers.

The distinction matters for companies: the Grand-Ducal regulation of 9 June 2021 counts charging points and pre-equipped spaces, not "chargers". See our article on EV charging requirements for company car parks.

Who is who in public charging

Public charging adds a few more roles that often appear in contracts and invoices:

A driver can charge on a network run by one operator with a card issued by another; the roaming price paid then depends on the card, not only on the station.

The building blocks

Grid connection and Smarty meter

It all starts with the building's connection to the distribution grid, run by Creos across most of the country, and locally by Diekirch, Ettelbruck or Sudstroum. The Smarty smart meter is installed at more than 98 % of metering points: it records consumption per quarter-hour, which underpins the reference-power grid tariff in force since 2025. Source: Luxtoday, smart meters in Luxembourg.

The Smarty meter measures the whole home, not the car. That point matters later, when a company wants to reimburse the electricity of a company car: our article on the Smarty meter and the electric car explains how the car's own kWh are isolated.

Board, circuit and protective devices

The distribution board gets a dedicated outgoing circuit for charging, with its own circuit breaker and a residual current device suited to electric vehicles. The cable to the charging point is sized for several hours at full current, something an ordinary living-room socket is not designed to handle every day.

The exact protective devices depend on the charger and the installation: that is the approved electrician's job, following the grid operator's technical connection conditions.

One point deserves attention because it often takes a single line in a quote: in a fault, an electric car can produce DC leakage currents that an ordinary residual current device does not reliably detect. Installations therefore usually combine a suitable residual current device in the board with DC fault detection, which many wallboxes already include. Ask the electrician which solution they plan and why.

Three more questions to ask before the works:

• Is the home's connection large enough when the wallbox, a heat pump and the cooker run at the same time? Load management in the wallbox can reduce the charging power automatically.
• How long is the cable run, and is its cross-section sized for a continuous load?
• Will the charger be mounted outdoors? Then its protection rating against water and dust matters, as does protection against unauthorised use.

Charging point and connector

The charging point can be a dedicated socket, a wallbox or a pedestal charger. In Europe, the standard AC connector is Type 2, and DC rapid charging uses CCS (Combo, a Type 2 plug with two extra DC pins). Every electric car sold in Luxembourg today supports both. CHAdeMO, the older Japanese DC standard, survives on a few stations for older models.

A wallbox comes either tethered (cable attached) or with a socket (the driver uses their own Type 2 cable). Tethered is more convenient every day; a socket is more flexible when several drivers share the charger.

Back-end and OCPP

A "connected" charger talks to back-end software through a protocol, the most widespread being OCPP (Open Charge Point Protocol). The back-end authorises sessions, balances power between chargers, reports kWh and can bill. Choosing an OCPP-compatible charger lets you switch provider without replacing hardware.

In new functional buildings with more than 20 parking spaces, smart charge management is mandatory. For private charger subsidies in collective buildings, smart chargers must support at least OCPP 1.6, and from 2027 smart chargers must comply with ISO 15118-20.

The four charging modes

Mode 2 is the cable supplied with most cars: its box checks the earth, limits the current and cuts off in case of a fault. On a dedicated 16 A socket, it charges at about 3.7 kW. Mode 3 is the wallbox mode, where charger and car negotiate the charging power.

The modes are described in the international IEC 61851 series, the connectors in the IEC 62196 series. For users, one simple rule is enough: Mode 3 or 4 for everyday use, Mode 2 on a dedicated, properly protected socket as a low-cost home solution, Mode 1 never for a car.

How the car and the charger talk to each other

In Mode 2 and Mode 3, the car and the charging point exchange a simple signal through a dedicated pin in the connector. The charger tells the car how much current it may draw, and the car confirms it is ready. Only then is the power switched on. That is why a charging cable is not "live" until it is plugged in at both ends.

The ISO 15118 standard goes further: it allows a digital dialogue between car and charger, for example "Plug & Charge" (automatic identification without a card), precise charge scheduling and, in future, bidirectional charging. That is why ISO 15118-20 becomes a condition for subsidised smart private chargers from 2027.

Power levels: 2.3 to 22 kW AC, much more on DC

Based on 20 kWh per 100 km measured at the plug, losses included. A three-phase 400 V supply is common in Luxembourg homes, so an 11 kW wallbox is often an option. Most cars are capped at 11 kW on AC anyway: a 22 kW charger will not charge a car faster if the car's on-board charger does not accept that power. Detailed times are in our guide to EV charging time.

AC or DC: where the conversion happens

The battery stores direct current (DC), while the grid supplies alternating current (AC). On an AC charger, the car's on-board charger converts the current, and its size caps the power. On a DC rapid charger, the conversion happens in the station itself, which is why it is large, expensive and needs its own grid connection. For a company car that sleeps at home every night, AC charging covers almost all needs; DC rapid charging is for long trips.

Who can install charging infrastructure in Luxembourg?

Always an approved electrician

Every charger must be installed by an approved electrician (électricien agréé), listed by the Fédération du Génie Technique. Preparatory works also follow the grid operator's technical connection conditions.

Grid operator request thresholds

A prior request is mandatory for any AC or DC charger of 7 kW or more three-phase or more than 4.6 kW single-phase. It goes through the myCreos portal. Once approved, Creos tells you the maximum power you may use.

Below these thresholds, for instance a 3.7 kW dedicated socket or a wallbox capped under 4.6 kW single-phase, no request is needed, but an approved electrician is still required.

Completion in Smarty PRO

After the works, the electrician records the installation in the Smarty PRO app and notifies completion. A report goes to the customer, the electrician and Creos, which closes the request. Creos does not itself inspect the charger's commissioning.

Source: Creos, je recharge ma voiture.

The process in practice

Anyone installing a high-power wallbox should check the household's reference power at the same time: every kWh drawn above it carries a grid surcharge of €0.0765 excluding VAT. A charger set to a moderate power avoids most of it, as explained in our article on cheaper night-time charging.

What does charging infrastructure cost?

Costs depend less on the charger than on the installation: distance to the board, state of the board, wall openings, trenching across a driveway. Orders of magnitude for a single-family home:

These are orders of magnitude, not quotes; the installed wallbox range is also the one quoted by Luxtoday. Get several quotes from approved electricians. VAT is 17 % on the charger and its installation.

Worked example with the subsidy: a smart wallbox costs €2,000 excluding VAT installed. The planned subsidy is 50 %, capped at €1,200: here, €1,000. The net cost is €1,000 plus €340 of VAT, so €1,340, provided the bill is passed as planned. Source: Luxtoday, charging stations in Luxembourg.

Subsidies: what the 2026 to 2030 scheme provides

The new subsidy scheme for private chargers, still a bill (no. 8577) at the time of writing and planned to apply retroactively to invoices from 1 January 2026, covers 50 % of costs excluding VAT, with caps:

• €750 for a standard charger in a single-family home, if installed by the end of 2026;
• €1,200 for a smart charger, €1,400 for an ISO 15118-20 charger invoiced in 2026;
• in a residential building, €1,200 per smart charger (OCPP 1.6 or later) and up to €40,000 per building for a collective smart management system.

The charger must be new, above 3.7 kW, not open to the public, and installed by an approved electrician. The claim is filed within one year after the end of the year of the invoice.

This aid targets individuals who own or rent the parking space. Companies fall under other schemes: see subsidies for workplace charging points. Source: guichet.lu, private charger subsidy 2026.

The public network: Chargy and SuperChargy

Luxembourg has a national public charging network:

• Chargy: about 668 stations of up to 22 kW, two charging points each, Mode 3 with Type 2 connectors.
• SuperChargy: about 84 DC rapid charging stations of up to 350 kW, Mode 4 with CCS, at service areas and on main roads.
• Chargy OK: privately owned stations connected to the national network, used the same way.
• Since 1 October 2025, Chargy and SuperChargy have been run by the charge@lux consortium under a 7-year concession.

Private operators complete the network, such as Electra in Capellen. Sources: Chronicle.lu, charge@lux becomes operator of the national network, Paperjam, charge@lux takes over Chargy.

What public charging costs compared with home

Public charging is billed per kWh through the driver's card or app, and the price is usually €0.50 or more per kWh, more on rapid chargers. At home, the marginal price of a kWh charged at night is about €0.19 on a dual-rate offer (energy, Creos volumetric fee of €0.051 per kWh and 8 % VAT).

Home charging costs two to three times less than public charging. For a fleet, the infrastructure question is therefore also a budget question: the more charging happens at home, at the real price, the lower the energy line. Our Electra card covers the trips where public rapid charging is needed.

Home or workplace: two different kinds of infrastructure

At home

One car, a whole night to charge: a 3.7 kW dedicated socket or a 7.4 to 11 kW wallbox is almost always enough. In a house, the owner decides alone. In a co-owned building, an individual charger paid for by one or more co-owners and affecting common parts requires an absolute majority, and a collective installation funded by the co-ownership a double majority; the full procedure is in our guide to EV chargers in apartment buildings. Source: Klima-Agence, charging in residential buildings fact sheet.

For cross-border workers, about 49 % of employees in Luxembourg, the installation follows the rules of their country of residence. All the options are covered in charging an electric car at home.

At the workplace

Several cars, visitors, limited connection capacity: the infrastructure becomes a system, with load management, back-end and often access control.

Why load management? Ten 11 kW wallboxes add up to 110 kW. If the car park only has a 40 kW connection, without control the company would have to pay for a costly grid upgrade or drop charging points. Load management shares the available 40 kW dynamically: with four cars plugged in, each gets 10 kW; with ten, each gets 4 kW. Over eight to nine hours parked during the working day, that usually covers the daily need.

Costs per point are higher at work than at home because the back-end, access management, billing and often civil works come on top. The RGD 2021 requirements (pre-equipment, charging points, smart charge management above 20 spaces) apply to new and transformed functional buildings. The full process is in our guide to installing charging points at work.

Equip to fit the real need

The right equipment is the one that covers the driver's actual need, not the most powerful one. A driver covering 60 to 120 km a day easily recovers the day's energy overnight on a 3.7 kW dedicated socket: ten hours give about 180 km. It costs far less than a wallbox and needs no grid operator request. An 11 kW wallbox makes sense for high-mileage drivers, large batteries or short nights.

Equipping each driver to fit their need, rather than installing the same charger everywhere, cuts a fleet's budget significantly. Our installation recommendation simulator suggests the right equipment for each profile, and the charger installation page explains how Voltaback helps you get installer quotes, without installing anything itself.

Four mistakes to avoid

1. Buying 22 kW by default: most cars accept 11 kW on AC, and higher power raises the risk of exceeding the home's reference power.
2. Ignoring the board: an old distribution board can cost more to upgrade than the charger itself.
3. Forgetting who owns the charger: write in the car policy whether it stays company property when the employee leaves.
4. Confusing measuring the charger with measuring the car: a charger shared by two cars, or used for a private car, does not tell you which kWh belong to the company car.

Fleets: no connected charger needed to reimburse

Many companies assume each driver needs a connected charger at home before home charging of a company car can be reimbursed. Not so. A connected charger measures what flows through it, but it does not know which car is plugged in or what the driver actually pays per kWh.

Voltaback is the software layer that does that job, whatever the infrastructure: dedicated socket, connected or non-connected wallbox. Voltaback relies on the home's MID-certified meter, not on a standalone cable meter. The kWh are matched to the right vehicle and reimbursed at the real price of the driver's own contract, about €0.19 at night for a Luxembourg resident, more for Belgian or German cross-border workers. The full comparison is in our article on connected chargers for fleets.

• 100 % software, no box, more than 48 car brands connected.
• Measurement audited by an independent third party: 1.22 % relative error.
• ISO 27001 certified, GDPR compliant; the company never receives drivers' geolocation.
• Monthly export ready to import into your payroll software.

In practice, this electricity reimbursed at measured real cost is generally treated as covered by the company car's flat-rate benefit in kind, according to the Grand-Ducal regulation of 23 December 2016; Luxembourg has no official flat rate per kWh. Have your fiduciary confirm this treatment. The home charging reimbursement page shows how it works.

Equip to fit the need, reimburse at real cost

Charging infrastructure does not need to be oversized to serve a fleet well: the right socket or wallbox in the right place, and software that measures and reimburses every kWh at each driver's real price, resident or cross-border. To talk it through, contact the Voltaback team.