Smart. Simple. Sustainable.

Fleet operators face enormous challenges. Economic success alone is no longer enough today. You also have to do justice to the climate. That's why KEYOU relies on H2 Mobility as a Service renting out converted CO2-free vehicles with hydrogen engines - without risk but including fuel, service, and insurance.

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As always. But green.
Modern drive technologies must be reliable, cost-efficient, and powerful to be a real alternative to existing solutions. We have taken these requirements to heart and created an all-around carefree package for fleet operators with the KEYOU H2 Mobility as a Service approach. Be among the first to test our 18-ton truck under real-life conditions!
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Zero emission, maximum performance - our 18 ton truck

Power

210 kW

Driving range

up to 600 kilometers

Displacement

7.8 liters

H2 Engine with KEYOU-inside

The current six-cylinder engine with a displacement of 7.8 liters is based on a diesel engine platform from an established manufacturer. It has a power output of 210 kW and a maximum torque of 1,000 Nm. Fuel is supplied via port fuel injection (PFI). The engines comply with the Euro VI emissions standard without expensive and vulnerable exhaust after-treatment technology. Fuel consumption is around 7.5 kg of H2 per 100 km.

350 bar storage system

The 350-bar storage system with a capacity of 27 kg of hydrogen - as currently installed in our pioneer vehicles - enables a range of approx. 350 km. If the entire space is utilized, ranges of up to 600km are also possible. Of course, this depends on customer requirements. Another advantage: While electric trucks spend several hours at the charging station, refueling with hydrogen takes only about 15 minutes.

Zero CO2. Zero compromise.

Our new claim says it all: As always. But green. Fleet operators don't have to get used to anything, because our 18-ton truck offers customers the same everyday practicality as a conventional diesel truck. The only difference: With us, you drive CO2-free! An 18-ton truck equipped with a KEYOU-inside hydrogen engine emits only harmless water vapor. According to the EU standard, our vehicles are considered "zero emission" because they emit less than 1 g CO2/kWh.

Rendering of the KEYOU-inside hydrogen engine
Image of the hexagon purus 27kg hydrogen tank installed in the pioneer vehicle
front of the KEYOU truck
Download the spec sheet

The base of our conversion technology

Innovative concept

We developed a proprietary low-temperature lean combustion concept that results in obtaining the highest performance with the lowest emissions.

Hydrogen system

The engine control system optimizes the management of the injection, air-charging, and ignition sub-systems, which have all been tailored for H2 burn. Some key mechanical components were improved for high durability.

Maximum performance

A smart engine operating strategy with the selected setup takes advantage of the H2-fuel properties allowing: high power densities(27 kW/L), high low-end torque (90% of maximum torque at 900 rpm), and high brake efficiency (peak of 44.5%).

Zero emission

H2 combustion emits water vapor. Traces of CO2 originating from the lubricating oil are close to zero, as are NOx emissions due to the low combustion temperature achieved.

Robust & cost-effective

Build on top of a mature diesel engine base platform, KEYOU’s H2-Engine offers the same high reliability and durability as Diesel engines. Due to the low modification effort and the fast integration of new components, the extra cost to pay is low.

How an ordinary diesel...

Previous generations of hydrogen engines were clean but low performance and required complex adaptation work. KEYOU, on the other hand, modifies existing diesel engines most effectively, using the same components. Retrofitting only those necessary for optimal hydrogen combustion operation.

...becomes a zero emission vehicle.

Thanks to optimized workflows and efficient processes, we can convert your existing fleet quickly and efficiently. Through our partner network, we guarantee the usual standard of service and maintenance even after the conversion. Contact us today to learn more about KEYOU-inside and our conversion services. Be a pioneer, and take the first step towards a CO2-free future, we will support you!

Hydrogen mobility without risk withpay-per-use

You do not have any experience with hydrogen? And want state-of-the-art technology without risk? While driving CO2-free and keeping an eye on your TCO? No problem, because we have developed an attractive "Pay-Per-Use" model for fleet operators. Unlike the usual purchase or leasing business, we rent out the converted trucks and charge a flat rate per kilometer ("pay-per-use") based on the annual mileage. This includes vehicle rental, maintenance and service, insurance, and even hydrogen. Our team, in partnership with trusted partners, will carry out maintenance and service for your vehicle.

Conversion Technology

We convert engine and vehicle to operate on hydrogen. The lowest possible investment for customers who want to use zero-emission hydrogen trucks and maintain their current business model.

Hydrogen

Vehicle and fuel go hand in hand. That's why you can also get your hydrogen from our local partners and benefit from attractive hydrogen prices.

Service & Maintenance

Don't worry — we’ve got you covered! Together with our partner network, we provide professional service, maintenance, and repairs for your H2 vehicle.

Insurance

With us, you get everything from a single source—including optimal liability and comprehensive insurance. We collaborate with reputable insurance providers to offer customized terms tailored to our products.

Our engine & vehicle projects

Over the last few years, KEYOU has worked on several funded projects. From the EU-funded "H2Engine project" for the 18-ton truck to the "BayVFP bus project" funded by the Bavarian Ministry of Economic Affairs to the "WaVe Unimog project" as well as the "HyCET project" for the development of a 40-ton truck with hydrogen engine.

KEYOU 40-ton truck rendering

"HyCET" - Development of a 13-liter H2 engine

The consortium research project HyCET ("Hydrogen Combustion Engine Trucks") aims to demonstrate the sustainability potential of hydrogen trucks in transport logistics. The joint project is led by the BMW Group as consortium leader, other partners are DHL Freight GmbH, DEUTZ AG, Volvo Trucks Technology, Total Energies Marketing Deutschland GmbH, and KEYOU. HyCET's total budget of 19.5 million euros is funded by the BMDV with 11.3 million euros. A further 5.7 million euros will be provided for the construction of the two filling stations. The research project will run for four years.
Image of the 12-meter city bus with a KEYOU-inside hydrogen engine

"BayVFP" - Development of a 12-meter city bus

With the 12-meter city bus that is based on the chassis of a leading European bus manufacturer, KEYOU presents another emission-free vehicle with a "KEYOU-inside hydrogen engine." The development and construction of the vehicle were supported by the Bavarian Ministry of Economic Affairs.

A special feature of this vehicle is that the hydrogen engine is operated here as a mild hybrid variant and thus meets the requirements that a transport company places on a city bus to a particular extent.
Image of the 18-ton truck with a KEYOU-inside hydrogen engine

EIC "H2Engine" - Development of an 18-ton truck

The European Union's EIC Accelerator funding program provides support to companies through a combination of grants and investments. The EIC fund specifically targets young and highly innovative impact and deep-tech companies. Under the grant project, KEYOU has built an 18-ton truck powered by a hydrogen engine based on a 7.8L engine from an established manufacturer with KEYOU-inside technology.

In April 2023, our 18-ton truck received road approval from TÜV Süd and is now the first of its kind to be allowed to drive on public roads.
Image of a Unimog with KEYOU-inside hydrogen engine

WaVe - Medium-duty H2 engine development

The aim of the "WaVe" joint project, which was funded by the German Federal Ministry for Economic Affairs and Energy, was to develop a hydrogen-based drive system for commercial vehicles in the medium-duty range and to test it in field trials using various demonstrators. At the core of the drive system is a new type of hydrogen combustion engine, which is supplemented with all the system components required for operation. A Unimog with a mower was built, and KEYOU was mainly involved in the development of the hydrogen engine.
Smart evolution into clean mobility: KEYOU at COP27 in Sharm El-Sheik

The next big thing

Pre-order your 40-ton truck

From 2026, we will offer the conversion of 40-ton trucks with a 13-liter KEYOU-inside hydrogen engine. Are you interested? Contact us today!

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