Liebherr has introduced the L 566 H, a large wheel loader concept powered by a hydrogen internal combustion engine and designed for demanding quarrying, earthmoving and bulk-material handling operations.
The development machine is based on the established L 566 XPower platform, but replaces the conventional diesel engine with a hydrogen-fueled combustion system developed for heavy off-highway equipment. Liebherr describes it as the world’s first operational prototype of a large wheel loader equipped with a hydrogen engine.
The concept is intended to show that large construction machines can move toward lower-carbon operation without abandoning the performance, rapid refueling and long working shifts associated with diesel equipment.
L 566 H Hydrogen Loader Concept
The L 566 H is neither a battery-electric loader nor a hydrogen fuel-cell machine. It uses hydrogen directly in an internal combustion engine.
That distinction is important. A fuel-cell vehicle converts hydrogen into electricity before using electric motors to drive the machine. The Liebherr concept instead retains a combustion-based powertrain that is mechanically closer to equipment already familiar to contractors, quarry operators and service technicians.
Liebherr selected hydrogen combustion after examining alternative power sources for large machines that are difficult to electrify. According to the manufacturer, the technology is particularly suitable for heavy equipment with high energy demand, long operating periods and limited opportunities for extended charging.
The prototype was initially unveiled in 2024 and later displayed at Bauma 2025 as Liebherr continued to demonstrate and test the concept. In 2026, the company confirmed that several hydrogen-powered wheel loaders of this type were being tested with customers.
Hydrogen Engine Targets Diesel Performance
The key objective behind the L 566 H is to deliver the power and operating behavior expected from a large diesel wheel loader.
Hydrogen contains no carbon, so burning it does not produce carbon dioxide directly from the fuel. Liebherr also says its engine concept can achieve very low nitrogen oxide emissions, although combustion temperature, engine calibration and exhaust treatment remain important factors in controlling NOx.
The company has not released a complete production specification sheet for the hydrogen prototype. However, Liebherr says the machine is designed to match the performance of its diesel-powered counterpart.
The underlying L 566 XPower platform is rated at 203 kW, or 276 hp, and has an operating weight ranging from approximately 23,900 to 26,900 kilograms, equivalent to about 52,690 to 59,300 pounds. Available bucket capacities range from 3.5 to 12 cubic meters, while tipping loads range from 12,100 to 15,900 kilograms. These numbers describe the standard diesel platform and should be treated as reference figures rather than confirmed final specifications for the hydrogen prototype.
For quarry applications, matching diesel performance involves more than achieving a headline horsepower figure. The loader must maintain torque under load, respond quickly during repeated bucket cycles and continue working in dust, heat and vibration without excessive thermal derating.
XPower Driveline Carries Over
The L 566 H retains Liebherr’s power-split XPower driveline, one of the most technically significant parts of the concept.
XPower combines hydrostatic and mechanical drive paths. The hydrostatic section supports rapid acceleration, precise control and frequent changes of direction during short loading cycles. The mechanical path becomes more efficient when the loader travels over longer distances or operates at higher speeds.
The system automatically manages the power flow between the two drive types according to the operating situation. Liebherr says the arrangement is intended to deliver fast working cycles, strong traction, lower energy consumption and high machine availability.
By integrating the hydrogen engine into an existing driveline architecture, Liebherr does not have to reinvent every major part of the loader. The manufacturer can preserve known hydraulic, transmission and structural characteristics while concentrating development work on hydrogen storage, combustion, thermal management and fuel delivery.
This is likely to be one of the concept’s strongest advantages. Contractors are generally more willing to adopt an alternative power source when the rest of the machine behaves like familiar equipment.
Full-Shift Hydrogen Operation
Liebherr says the L 566 H can operate for a complete working shift before refueling.
The company claims that refueling can be completed in approximately 10 to 15 minutes, allowing the loader to return to work much faster than a large battery-powered machine connected to a conventional charger.
That characteristic could be particularly important in quarries, gravel plants and industrial material-handling sites. A large loader may be required to feed a crusher, move stockpiles or load trucks continuously. When the loader stops, the productivity of the entire site can be affected.
Hydrogen combustion therefore offers an operational pattern similar to diesel:
- The machine works through a normal shift.
- The operator refuels during a planned break.
- The loader returns to service without a long charging period.
The trade-off is that hydrogen requires specialized storage and fueling equipment. The economic case will depend heavily on fuel availability, infrastructure cost and the price of low-carbon hydrogen.
Quarry Tests Move Beyond Demonstration
The L 566 H has progressed beyond a static trade-show exhibit.
Liebherr and STRABAG have tested the loader in quarry operations in Austria, where the machine has been used to gather practical information on performance, fuel consumption, refueling, reliability and daily operating behavior.
Liebherr has also demonstrated the machine at a gravel plant in Munich alongside hydrogen-powered trucks from MAN and Daimler Truck. The demonstration was intended to show how hydrogen engines could support several stages of construction-site and material-transport operations.
These trials are more meaningful than a short controlled demonstration because quarry work exposes equipment to repeated high-load cycles, abrasive dust, vibration and long operating hours.
The testing process should help determine whether the hydrogen system can deliver acceptable maintenance intervals and machine availability under real production conditions.
Hydrogen Supply Remains the Critical Issue
The environmental value of the L 566 H depends on how its hydrogen is produced.
Hydrogen generated using renewable electricity can substantially reduce lifecycle greenhouse gas emissions. Hydrogen produced from fossil fuels without effective carbon capture offers a much weaker environmental benefit.
There are also energy losses during hydrogen production, compression, transportation and storage. As a result, hydrogen is unlikely to be the most efficient solution for every machine category.
Battery-electric power will often remain more practical for compact machines, indoor equipment and predictable duty cycles with sufficient charging time. Hydrogen combustion may have a stronger case in large equipment that works long shifts and requires fast refueling.
Fixed industrial sites could become the most realistic early market. A quarry, mine or large recycling facility can install a centralized fueling point and operate multiple hydrogen-powered machines from the same infrastructure. A small contractor moving one loader between temporary sites would face a more difficult logistical challenge.
Technical Outlook
The L 566 H is a credible engineering concept because Liebherr is not trying to force a light-duty powertrain into a heavy production machine.
Instead, the company is combining a hydrogen combustion engine with a proven large-loader platform and an established XPower driveline. That approach could reduce development risk and preserve the operating characteristics expected by experienced wheel-loader operators.
The machine also addresses one of the biggest limitations of battery-electric heavy equipment: the relationship between battery size, machine weight, charging time and continuous energy demand.
However, proving that the loader can move material is only the first step. Its commercial future will depend on hydrogen cost, fuel availability, storage regulations, engine durability and the total operating cost compared with diesel and battery-electric alternatives.
The L 566 H is most convincing as a specialized solution for high-utilization machines operating from a fixed base. It is less convincing as a universal replacement for diesel across the entire construction market.
The concept therefore should not be interpreted as evidence that hydrogen will replace every wheel-loader powertrain. It is better understood as part of a broader technology-neutral strategy in which different machine classes receive different energy solutions.
If Liebherr can demonstrate diesel-like reliability, competitive hourly costs and dependable access to renewable hydrogen, the L 566 H could become an important option for quarries and industrial sites seeking to reduce fossil-fuel consumption without accepting long charging interruptions.
About Liebherr
Liebherr was founded in 1949 and has grown into a family-owned international group operating in construction machinery, mining equipment, cranes, aerospace, transportation systems, components, refrigeration and several other sectors.
The group generated revenue of €14.772 billion in 2025, an increase of €150 million, or 1 percent, compared with the previous year. Liebherr employed 55,963 people at the end of 2025 and operated more than 150 companies, including more than 40 production companies. The group invested €1.059 billion during the year.
Liebherr also produced its 100,000th wheel loader in 2026. The milestone reflects several decades of wheel-loader production at the company’s Bischofshofen facility, which is also involved in the development of the L 566 H and other alternative-drive concepts.
Source: www.liebherr.com
