Everllence, MEYER RE Form Methanol Retrofit Partnership for Maritime Vessels

Everllence and MEYER RE are partnering to develop and advance methanol retrofit solutions for existing maritime vessels; specifically, converting four-stroke engines to methanol operation. Both companies will deploy their expertise to minimize the industry’s carbon footprint, improve operational efficiency, and comply with environmental regulations.

“By concluding this partnership frame agreement, we are laying the foundations for strong, trusting, and sustainable cooperation—a joint path to and for a greener future,” said Bernd Siebert, Head of Retrofit & Upgrade at Everllence. “With our methanol retrofit packages, we offer our customers an economically attractive opportunity to convert their older engines to a future-proof engine type. Together with MEYER RE, we will now develop a holistic concept for retrofitting the entire ship system.”

The collaboration will establish a practical and scalable roadmap for shippers to transition toward green fuel alternatives and sustainable maritime operations. The technical and operational strategy uses methanol as the primary fuel source and outlines vessel retrofitting, methanol fueling infrastructure, and setting sector-wide safety standards/practices.

Methanol-fueled maritime engine | Image Credit: Everllence

"The challenges for cruise ships are substantial,” said Henning Jongebloed, Head of Sales at MEYER RE. “Retrofitting cruise vessels is a relatively new concept, as these ships function like small cities with complex subsystems. A holistic approach is necessary, as changing an engine or fuel alone is not enough. That’s why teaming up with experienced partners is crucial to ensuring that the entire system functions seamlessly, including energy production."

Everllence Delivers Superyacht Engine

In early July 2025, Everllence received its first order for its dual-fuel methanol engine, 175DF-M, for a superyacht under construction at an undisclosed European shipyard. By July 2027, it will deliver two 12V175DF-M and one 16V175DF-M variable-speed yacht generator sets, including methanol fuel-supply systems.

Since the engine went into development in 2023, Everllence has received interest in its 175DF-M engine from the ferry, cruise, offshore, tug, superyacht, and governmental segments and has started working with several customers on concrete vessel concepts, including newbuilds that are methanol-capable on delivery, and on methanol-ready concepts that allow future conversion of current ship designs via a retrofit scenario.

Based on computational simulations and the optimization of the combustion process on the test bed, the 175DF-M will achieve methanol shares in combination with a high-power density and high fuel efficiency.

Ammonia Genset: NH₃ Spark

In May, Danish-based Energy Technology Development and Demonstration Program launched the NH3 Spark – FutureFlex project to develop a dual-fuel, four-stroke genset that operates 100% on ammonia without pilot fuel. Everllence's (previously MAN Energy Solutions) Holeby site will lead the project’s consortium with the Technical University of Denmark (DTU) and Skovgaard Energy, a Danish renewable-energy player.

Everllence will develop a sustainable small-bore engine. During the project, the concept's suitability for use with other low-emission fuels will be evaluated. During the first project phase, slated for later this year, the team will test ammonia on a single-cylinder MAN genset at DTU Construct’s engine laboratory. Next, a full-scale test will be conducted under power plant conditions at Skovgaard Energy's green-ammonia production facility.