FAT milestone pushes Everllence ammonia dual-fuel engine to ‘brink’ of commercial debut

Everllence has revealed the successful factory acceptance test (FAT) of its first two-stroke, large-bore ammonia-burning engine, clearing the way for its commercial rollout.

The FAT was conducted at the manufacturing facility of HD Hyundai Heavy Industries, Engine & Machinery Division (HHI-EMD) in South Korea. Intended for a very large ammonia carrier (VLAC) under construction for Singapore-based Eastern Pacific Shipping (EPS) at HD Hyundai Heavy Industries (HHI), the two-stroke dual-fuel liquid gas injection ammonia (ME-LGIA) engine is equipped with high-pressure selective catalytic reduction (HPSCR) technology. The HPSCR is an aftertreatment system used to remove nitrogen oxides (NO and NO2) formed during combustion.

“This is a huge milestone that places our ammonia engine on the very brink of its commercial debut. This engine sets new benchmarks in zero-carbon propulsion and digitally connected performance, and has attracted great interest since development began,” said Everllence senior vice president and head of Two-Stroke R&D, Ole Pyndt Hansen.

Formerly known as MAN Energy Solutions, the engine designer first unveiled its two-stroke ammonia engine in November 2025. Built on the Diesel-cycle principle and dual-fuel liquid gas injection concept, the engine shares many characteristics of Everllence’s existing ME-LGIM and ME-LGIP units, which operate on methanol and LPG, respectively. Additionally, the new engine incorporates enhanced safety measures tailored to ammonia’s properties as a fuel, including containment systems, advanced sensors, dedicated ventilation, and double-walled piping.

“The ME-LGIA successfully completed its FAT in all operation modes, and we can report that the engine is stable and running very well,” said Everllence vice president and head of Global Sales & Promotion, Christian Ludwig.

The engine maker initially plans to release the ME-LGIA platform in G50, S50, S60, G60, G70, and G80 bore sizes, as well as retrofit options for existing engines.

This milestone also marks an important step forward for EPS’ ammonia programme. The two ammonia carriers under construction at HHI – with first delivery scheduled for October 2026 – will be the first in the world to be equipped with the Everllence 6G60ME-LGIA ammonia engines.

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