Workplace EV charger installation in Europe: steps, sizing, grid and costs for businesses

A workplace EV charger project has five steps: a needs audit, a site survey with a load assessment, the grid operator request, installation and commissioning, then the back-office and access policy. The decisive step is the first one, because the number of charge points you need depends on which vehicles park at the site and for how long, not on the size of your fleet.

This guide gives facilities and fleet managers a project plan that works across Europe: a sizing method, the grid and installer rules of each country (Germany, the Netherlands, Belgium, Luxembourg, the UK and others), installed costs in euros, the tax position of charging at work, a timeline and a 5-year cost model on 50 vehicles. It also looks at where company cars really charge, because most of them do it at home, which Voltaback measures and reimburses without hardware for more than 200 companies.

Step 1: audit who parks where, and for how long

Before talking to an installer, list your vehicles in five groups:

For each group, note the dwell time: how many hours the vehicle stays parked at the site. The power you need follows from it.

A car parked 8 hours on a 7 kW socket takes far more than an average day's driving. A van with a 1-hour break between two rounds needs DC.

Tip: run a one-month pilot on a few vehicles and measure where they really charge before you sign for 25 sockets. The answer often surprises.

Step 2: site survey and load assessment

The installer checks the main supply, the distribution board, cable routes, trenching and the parking layout. The key output is the available capacity: how many kW the site can add without a new or upgraded connection.

Ten 11 kW sockets running at full power call for 110 kW. Very few office sites have that much spare capacity. Dynamic load management solves most cases: it shares the available power between the cars charging at the same time, so you avoid or delay an upgrade. For cars that stay parked all day, the lower power per car makes no practical difference. Brussels grid operator Sibelga, for example, gives two options for a site with a 100 kVA connection: cap each point at 10 kW, or install dynamic load balancing. Source: Sibelga.

Ask the survey to cover:

• the connection capacity and the measured peak of the building over a year;
• the distance from the board to the parking spaces, and whether trenching is needed;
• ducting for future points, which is far cheaper during the first works;
• the capacity tariff, where one exists: in Flanders and Luxembourg, grid fees depend on the peak drawn, so unmanaged charging can raise the bill even without an upgrade;
• solar panels or a battery that could feed the charge points.

Step 3: the grid operator request

Every European country requires some form of notification to the grid operator. The thresholds and lead times differ.

Sources: § 19 NAV, Creos, charging your car, GOV.UK, connecting EV chargepoints to the network.

In practice, your installer usually files the request. But the company must start early: the grid response, not the installation, sets the project timeline. In the Netherlands, check the congestion map of your grid operator before you even design the site; if a heavier connection is not available, size the project on the existing capacity with load management, a battery or solar.

Step 4: installation and commissioning

Installed cost per charge point

These ranges come from installer prices in Belgium and Luxembourg; Germany and the Netherlands are similar (an AC point at 1,000 to 3,000 € for the hardware, plus a few hundred to a few thousand euros of installation). Trenching, paving and connection upgrades come on top and vary more than the hardware. Sources: ADAC, Milieu Centraal.

Running costs are often forgotten in quotes: a back-office subscription of about 10 to 15 € per point per month, maintenance and periodic inspection of about 20 € per point per month at the low end, a SIM card for 4G models.

For a full view of home, workplace and public charging layers, see our guide to EV charging infrastructure for fleets.

Choosing the installer

Ask at least three installers for a price per socket over 5 years, including back-office, maintenance and any grid work. It is the only figure that lets you compare quotes. Voltaback does not install charge points, but helps companies and drivers get competing quotes.

Questions to ask every installer

1. Which load management system do you propose, and what peak will the site reach with it?
2. Is the hardware OCPP-compatible, so we can change back-office provider later?
3. Are the meters MID-certified, and can session data be exported per vehicle?
4. Who files the grid request and the inspection, and what lead time do you see for our grid operator?
5. What is included in maintenance: response time, remote diagnostics, spare parts, periodic checks?
6. How much does it cost to add points in two years if we lay ducting now?
7. What warranty applies to hardware and to the installation, and who handles a fault?

Compare the answers, not only the totals: a cheap quote without load management can lead to a connection upgrade that costs more than all the points together.

What the law requires

In the EU, the recast Energy Performance of Buildings Directive (EU) 2024/1275 sets minimum charging infrastructure for non-residential car parks, through national law. An existing non-residential building with more than 20 parking spaces needs at least one recharging point per 10 spaces, or ducting for at least half of the spaces, by 1 January 2027; new and majorly renovated buildings face stricter ratios. Germany already requires at least one charge point in every non-residential building with more than 20 parking spaces since 1 January 2025 under the GEIG. Sources: EUR-Lex, Directive (EU) 2024/1275, § 10 GEIG.

The UK, outside the EU, has no retrofit duty for existing workplace car parks; in England, Approved Document S applies to new buildings and major renovations. The country-by-country minimums are set out in our article on workplace charging requirements.

If you open points to the public (visitors, customers, neighbours in the evening), the EU Alternative Fuels Infrastructure Regulation (AFIR) applies: ad hoc payment without a subscription and clear price display. Points reserved for staff and company vehicles are private and outside its scope.

Step 5: back-office and access policy

Once the sockets work, decide who may use them and on what terms:

• Access: RFID badges or an app, by group (pool cars first, then company cars without home charging, then staff and visitors).
• Rotation: a maximum stay, or an overstay fee if sockets are scarce, so that a car charged at 10 am does not block the socket until 6 pm.
• Pricing: free, at cost or at a set price for employees' own cars, with tax consequences explained below.
• Data: energy per vehicle for cost allocation and CO2 reporting; under the GDPR, keep session data to what the purpose needs, and consult the works council where required.

The back-office is a running cost per socket. Every socket you add costs money every month, which is why sizing matters more than the purchase price.

Project timeline

Count three to six months for a typical office site without a connection upgrade. Apply for grants at the right moment in this sequence: most require the application before the order. The national schemes still open are compared in our guide to EV charger grants for businesses.

Who pays the electricity, and the tax

Charging a company car at work raises no tax issue anywhere: the electricity is a cost of the car. Charging an employee's own car is where the countries differ.

Sources: BMF letter of 11 November 2025, Rijksoverheid, travel allowance, s.237A ITEPA 2003.

A simple rule works almost everywhere: let employees charge their own cars at your purchase price per kWh, taxes included. No benefit, no payroll line, and no queue of free riders at the sockets.

Where company cars really charge

The share of energy charged at home, at work and on public networks varies by country and by fleet:

• In Belgium, a 2022 survey of 250 fleet managers by link2fleet and Mobia found that about 73 % of companies had invested in charge points on their own site, and 56 % in chargers at employees' homes, up from 14 % in 2019. Source: Touring.
• In Luxembourg, the 2026 Arval barometer of 300 companies found that 86 % rely on on-site charging, 65 % on public charging and only 21 % on home charging, in a country where about half of the employees are cross-border commuters. Source: Paperjam.
• Where drivers have a driveway, home is the cheapest energy by far: about 0.24 € per kWh at night in Belgium, about 0.32 € in Germany, against roughly 0.49 to 0.89 € per kWh on German public AC and DC chargers. Source: Destatis.

The pattern for sizing is clear. Workplace sockets serve pool cars, vans, drivers without home parking, cross-border drivers whose home country has slow or expensive charging, and visitors. They do not replace home charging for drivers who can plug in on their driveway, and that home energy still has to be measured and reimbursed.

Profitability: what a kWh at work really costs

The price of a workplace kWh is the electricity plus the hardware and running costs spread over the energy the socket delivers. Utilisation drives everything.

Take a socket at 3,000 € installed, depreciated over 5 years, so 600 € per year of hardware, plus about 300 € per year of back-office and maintenance:

Add the electricity at your business tariff. An under-used socket ends up costing more per kWh than a public rapid charger. A grant changes the hardware line, not the conclusion: install for vehicles that will use the socket every day.

Worked example: 50 vehicles over 5 years

A company has 50 electric vehicles: 38 company cars whose drivers can charge at home, 4 company cars without home parking, and 8 pool cars and vans that return to the site. Two strategies:

The 540 € average for home setups is a mix: nothing for drivers already equipped, a reinforced socket or a basic charger for the others. Strategy B saves about 97,000 € over 5 years, and the 6 points with load management cover the 12 vehicles that really need to charge on site. If the grid connection needs no upgrade for 6 points but would for 25, the gap widens further.

The figures are orders of magnitude from Belgian and German installer prices; adapt them with your own quotes. For the tax effects of the investment, see how to depreciate company assets and vehicles.

Which solution for which vehicle profile

For drivers who charge at home, the right equipment depends on their setup; our recommendation tool for charging installations suggests what each one needs. Whether to fund a charger at each driver's home is covered in home chargers for fleet drivers.

Buy, lease or charging-as-a-service

The installation does not have to be a capital purchase. Three models coexist across Europe:

Leasing and charging-as-a-service move the risk of obsolescence to the provider, which matters because standards still evolve (ISO 15118 for plug and charge, bidirectional charging). Check three clauses: what happens at the end of the term, who owns the data, and whether you can switch back-office provider without replacing the hardware (OCPP compatibility). In rented offices, agree with the landlord who keeps the infrastructure when the lease ends.

Solar panels and batteries on site

A company car park is often a good place for solar: a carport produces during office hours, exactly when the cars are parked. Three points to check:

• Self-consumption: midday production matches workplace charging well on office days, much less at weekends and in winter. Smart charging can follow production to raise the share used on site.
• Peak shaving: a stationary battery can feed the charge points at peak times and avoid a connection upgrade or a higher capacity charge. In the Netherlands, SPRILA supports such a battery when it feeds the charge points.
• Permits: a carport is a structure; planning rules differ by municipality and country, and the timeline can exceed that of the charge points themselves.

Solar does not change the sizing rule. It lowers the cost of each kWh delivered at work, so it improves the case for well-used sockets and does little for idle ones.

Safety, insurance and maintenance

Charge points are electrical installations in a public-facing space. Plan for:

• Inspection and periodic checks: Belgium requires an inspection by an approved body before use; Germany expects regular testing of electrical equipment under accident insurance rules; most countries recommend at least a yearly check of residual current devices.
• Fire safety in underground car parks: insurers and fire services may ask for specific measures (location of points, emergency cut-off, ventilation). Ask your insurer before the design is frozen, not after.
• Insurance: declare the installation to your property insurer; check liability cover for points used by visitors.
• Maintenance contract: a guaranteed response time, remote diagnostics, spare parts. A broken socket in a car park sized on use means a vehicle that cannot charge.
• Cable management: tethered cables or holders reduce trip hazards and damage.

Common mistakes

1. Sizing on the fleet, not on the vehicles that park. "One point per two cars" ignores that most company cars charge at home.
2. Buying 22 kW points for cars that accept 11 kW. The extra cost brings no faster charging.
3. Forgetting the running costs. Back-office and maintenance over 5 years often exceed the hardware price.
4. Starting the grid request too late. The grid response sets the timeline, not the installer's diary.
5. No ducting for later. Adding points in year 3 costs far more if the trench must be dug again.
6. Free charging for everyone without a policy. Queues, tax questions and electricity bills follow.
7. Ordering before the grant application where the scheme requires the reverse.
8. Treating home charging as someone else's problem. It remains the largest share of most fleets' energy, and it must be measured and reimbursed.

Multi-site and international roll-outs

Groups with sites in several European countries face a choice: one charging provider everywhere, or local installers per country. Both work, with different trade-offs.

• One European provider gives one back-office, one badge for drivers moving between sites and one consolidated report. But the provider still subcontracts the installation in most countries, and the grid request, inspection and installer qualification remain local.
• Local installers per country are often cheaper and faster on site, but the group ends up with several back-offices and several reports to reconcile.

A practical middle path: standardise the requirements (OCPP-compatible hardware, MID meters, load management, data export format, access rules), then let each country tender locally against that specification. Roll out in waves, starting with the sites where pool vehicles and vans are concentrated, because that is where usage, and therefore return, is highest.

Keep one rule constant across countries: the charging policy. Who may charge, at what price, with which priority, and how the energy is allocated to each vehicle for cost and CO2 reporting. Under the EU Corporate Sustainability Reporting Directive, energy per vehicle feeds scope 1 and 2 reporting far better than averages.

For drivers, the workplace is only one of three charging places. A fleet report that combines workplace sessions, home charging and public charging cards per vehicle is what lets finance see the real cost per kilometre, and fleet managers see which sites need more points and which have too many.

Checklist before you sign

1. Vehicles listed by group, with dwell times and home charging access.
2. Site survey with connection capacity and yearly peak.
3. Grid operator contacted, congestion and lead time known.
4. Number of points sized on daily use, with load management and ducting for later.
5. Three quotes compared on cost per socket over 5 years.
6. Installer qualification checked for your country.
7. Grant window checked, application filed before the order where required.
8. Access, pricing and data policy written, works council consulted where required.
9. Home charging policy decided at the same time, for the drivers who will rarely use the site.

Home charging, measured without hardware

For the company cars that charge at home, Voltaback measures each session from the car's own data, for more than 48 car brands, and reimburses the driver at the real cost of their contract, or at the local flat rate where one exists. Voltaback relies on the home's MID-certified meter, not on a standalone cable meter, and its measurement has been audited by an independent third party at a 1.22 % relative error.

• One view of all charging: home, workplace and public, per vehicle.
• No hardware: nothing to install at drivers' homes, in any country.
• Privacy: ISO 27001 since 2 December 2025, and the company never receives the drivers' location.

See how home charging reimbursement works.

Size your site on real usage

The best workplace charging project is the one sized on the vehicles that really park there. Measure first, install second, and reimburse home charging for the rest.

Book a demo and we will show you where your fleet's energy is really charged.