Article

Everllence has operated a four-stroke engine on 100% hydrogen for the first time at its Augsburg facility as part of its HydroPoLEn project, which began in late 2023. The existing Type 35/44DF engine, originally designed for dual-fuel use, has been modified to enhance performance density under hydrogen operation.

Although this research engine is still in the testing phase and not commercially viable yet, it reflects a significant step in exploring alternative maritime propulsion technologies. In comparison to fuel cells, which are also under development, hydrogen combustion offers familiar technology for shipowners, although it has lower efficiency and may produce harmful nitrogen oxides. Everllence is also developing a large electrolyzer through its subsidiary Quest One, further integrating hydrogen production and consumption.