SciTransfer
ZEFER · Project

Hydrogen Taxi and Police Fleets Proven Across Three European Capitals

transportPilotedTRL 7
zefer.eu

Imagine replacing a city's taxi fleet with cars that run on hydrogen and emit nothing but water. That's exactly what ZEFER did — they put 180 hydrogen fuel cell vehicles on the streets of Paris, London, and Copenhagen as taxis and police cars. The idea was to prove these vehicles can handle the brutal daily grind of professional driving (some clocking over 90,000 km a year) while making the business case work for fleet operators who want to dodge pollution charges and fuel costs.

By the numbers
180
hydrogen fuel cell vehicles deployed
170
vehicles operated as taxis or private hire
10
vehicles used by police
90,000+ km/year
per-vehicle mileage in Paris
75,000+ km/year
per-vehicle mileage in Copenhagen
40,000+ km/year
per-vehicle mileage in London
3
capital cities (Paris, Copenhagen, London)
EUR 4,998,843
EU contribution
19
consortium partners across 5 countries
The business problem

What needed solving

City fleet operators — taxis, private hire, police — face mounting pressure from low-emission zones and pollution charges, but switching to zero-emission vehicles seems risky when hydrogen infrastructure is sparse and vehicle costs are high. The chicken-and-egg problem persists: without enough vehicles, refuelling stations can't justify their investment; without enough stations, fleet operators won't buy the vehicles. Someone had to go first and prove the numbers work.

The solution

What was built

ZEFER deployed 180 hydrogen fuel cell vehicles in real commercial operations: 170 as taxis and private hire vehicles plus 10 police cars across Paris, Copenhagen, and London. The project collected robust performance and business case data over six years of intensive use, with vehicles logging up to 90,000 km/year.

Audience

Who needs this

Taxi and private hire fleet operators in cities with low-emission zonesMunicipal fleet managers procuring police or emergency vehiclesHydrogen refuelling station developers building demand forecastsCity transport planners evaluating zero-emission fleet transitionsAutomotive OEMs sizing the captive fleet market for fuel cell vehicles
Business applications

Who can put this to work

Urban Taxi and Ride-Hailing Services
mid-size
Target: Taxi fleet operators and private hire companies in cities with low-emission zones

If you are a taxi fleet operator facing tightening emission regulations and pollution charges in city centres — this project deployed 170 hydrogen fuel cell vehicles as taxis across Paris, Copenhagen, and London, logging over 90,000 km/year per vehicle in Paris alone. The operational data and business case analysis can help you evaluate whether hydrogen taxis make financial sense for your fleet before you commit capital.

Municipal and Emergency Services
enterprise
Target: City councils and police forces managing vehicle fleets

If you are a municipal fleet manager looking to decarbonise police or emergency vehicles without sacrificing uptime — this project tested 10 hydrogen fuel cell police vehicles in real duty cycles. Unlike battery-electric alternatives, these cars refuel in minutes rather than hours, which matters when vehicles need to stay on the road around the clock.

Hydrogen Refuelling Infrastructure
enterprise
Target: Energy companies and hydrogen station developers

If you are an energy company building the business case for hydrogen refuelling stations — this project generated real demand data from 180 vehicles using existing and planned stations across three cities. High-mileage captive fleets like taxis solve the chicken-and-egg problem by guaranteeing station throughput, which is the data you need to justify infrastructure investment.

Frequently asked

Quick answers

What does it cost to switch a taxi fleet to hydrogen?

The project data does not disclose per-vehicle costs. However, ZEFER's core finding is that high-utilisation captive fleets (taxis doing 90,000+ km/year) improve the unit economics of hydrogen vehicles by spreading the higher purchase price across more kilometres. The total EU contribution was EUR 4,998,843 across 180 vehicles and 19 partners.

Can hydrogen taxis handle the same workload as diesel ones?

Yes — that was the whole point. Paris taxis logged over 90,000 km/year, Copenhagen over 75,000 km/year, and London over 40,000 km/year. These are professional duty cycles that test vehicles to their limits, and the project ran for six years (2017–2023) to accumulate long-term performance data.

Is the technology available for purchase or is it still experimental?

ZEFER used commercially available fuel cell vehicles (not prototypes) deployed in real commercial operations. The project was classified as an Innovation Action focused on demonstrating viable business cases, not developing new technology. Based on available project data, vehicles were sourced from existing manufacturers.

What about hydrogen refuelling — is there enough infrastructure?

The project relied on existing and planned hydrogen refuelling stations in Paris, Copenhagen, and London. A key finding was that captive fleets like taxis create guaranteed demand that strengthens the business case for station operators, helping solve the infrastructure gap.

Which cities or regions benefit most from this?

Cities with active low-emission zones and pollution charges benefit most, since hydrogen vehicles avoid these costs entirely. The project specifically targeted Paris, Copenhagen, and London — all cities with aggressive clean air policies. Any European city considering similar regulations could replicate these business cases.

How quickly can a fleet be deployed?

ZEFER committed to deploying the majority of its 180 vehicles by end of 2018, roughly one year after the project started in September 2017. This suggests that with willing fleet customers and available refuelling stations, deployment timelines of 12–18 months are realistic.

Who owns the intellectual property and operational data?

The consortium of 19 partners includes 16 industry organisations. Based on available project data, the dissemination campaign aimed to share business case analyses across Europe. Contact the coordinator for specific data-sharing arrangements and licensing terms.

Consortium

Who built it

The ZEFER consortium is unusually industry-heavy: 16 out of 19 partners are from industry (84%), with zero universities or research institutes. This signals a project built for commercial deployment, not academic exploration. The 5 SMEs in the mix suggest involvement of specialised hydrogen or mobility startups alongside larger fleet operators. With partners spread across 5 countries (Belgium, Denmark, France, Germany, UK) and vehicle deployments in three capital cities, the consortium was structured to prove real-world business cases rather than advance basic science. For a business evaluating hydrogen fleets, this consortium composition means the project outputs — operational data, cost analyses, and deployment playbooks — come from operators who had skin in the game, not from lab researchers.

How to reach the team

Environmental Resources Management Limited (UK) coordinated the project. Use SciTransfer's coordinator lookup service to get the right contact.

Order a report on this consortiumSee ENVIRONMENTAL RESOURCES MANAGEMENT LIMITED profile →
Next steps

Talk to the team behind this work.

Want the full business case data from 180 hydrogen vehicles across three cities? SciTransfer can connect you directly with the ZEFER team and help you evaluate whether hydrogen fleets fit your operations.

Order a report on this topicMore in Transport & Mobility
More in Transport & Mobility
See all Transport & Mobility projects →
Modular Rail Wagons That Cut Steel Industry Raw Material Transport Costs
ITECCO Demo
Open →
Dual-Line Road Marking Inspection Device That Cuts Survey Costs in Half
DuaLine
Open →
Ready-to-Buy Electric In-Wheel Motor That Cuts Weight 25% and Fits Any Vehicle
GEM in-wheel
Open →