On December 4, 2025, in Wejherowo, construction officially began on the first non-commercial hydrogen bus refueling station in Poland. Rockfin, as the general contractor, is carrying out the project in a “design and build” formula, using its proprietary HyVentive technology.
On 4 December 2025, the construction of a hydrogen refuelling station for the Municipal Transport Company (MZK) in Wejherowo officially began. This is the first non-public hydrogen refuelling station in Poland developed using Rockfin’s proprietary HyVentive technology. The project is being delivered under a design-and-build contract, with Rockfin acting as the general contractor, technology supplier and system integrator.
Key parameters and functionality of the station
The station will be located within the MZK Wejherowo bus depot and will serve Solaris Urbino 12 Hydrogen buses. In its initial phase, it will support refuelling six buses per day, with each refuelling cycle taking up to 20 minutes. The installation has been designed to allow a future expansion, enabling the station to refuel up to twelve buses per day.
Hydrogen will be dispensed at a nominal pressure of 350–420 bar, depending on the temperature of the fuel. The entire installation has been designed for a maximum operating pressure of 600 bar. Hydrogen will be delivered to the station in high-pressure tanks mounted on a trailer.
Advanced technological infrastructure
The hydrogen refuelling station is being built as a complete, integrated system comprising:
- a compressed hydrogen reception system for trailer unloading,
- a valve control panel designed and assembled entirely by Rockfin,
- a hydrogen compressor up to 550 bar, equipped with hydraulically driven compression pistons,
- stationary high-pressure storage bundles (500 bar) enabling the refuelling of up to two buses without engaging the compressor,
- a hydrogen dispenser with two refuelling nozzles and an in-line hydrogen chiller,
- an electro-pneumatic valve control system,
- comprehensive safety and fire-protection systems, including hydrogen leak detection, hydrogen flame detection, lightning protection and a controlled hydrogen venting system,
- additional subsystems supporting the safe and efficient operation of the installation.
Rockfin’s comprehensive scope of work
Rockfin is responsible for delivering all technological equipment and integrating it into a single, coherent, fully operational system. This includes:
- equipment specification and selection,
- development of functional diagrams,
- creation of control algorithms,
- design of all safety systems,
- mechanical and automation integration.
An essential part of the project also includes the execution of civil works, such as foundations, access roads, sanitary installations, electrical systems and lighting.
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