Everllence has completed the type approval test (TAT) of its ME-LGIA ammonia-burning two-stroke engine at its Research Centre Copenhagen (RCC), with eight classification societies overseeing the process, which took place from 10-12 June.

Bjarne Foldager, Head of Two-Stroke Business at Everllence, commented: "The TAT is yet another important step as we definitively move from concept development to seagoing engine operation. It confirms the Everllence B&W ME-LGIA as ready for onboard installation and is the last test before actual sea and gas trials. This engine sets new benchmarks in zero-carbon propulsion and digitally connected performance, and has attracted great interest since its development was announced in 2019. It stands testament to Everllence's unique ability to meet demands and bring innovative fuels to market."

The ME-LGIA engine operates on the diesel principle and uses the dual-fuel liquid gas injection concept, which Everllence notes has accumulated several hundred thousand operational hours. The company officially marketed the engine at a two-day event in Copenhagen in November 2025.

Ole Pyndt Hansen, Senior Vice President and Head of Two-Stroke R&D at Everllence, stated: "The TAT is also important in relation to maturing IMO ammonia regulations as it is vital that rules and guidelines are in line with reality to optimise safety onboard vessels. This experience comes from industry and the first ammonia-driven ships, which are expected to operate at sea during 2026, will act as compelling input for the development of these guidelines."

The ammonia TAT also marks the end of operations at the RCC in its current location, as the company is due to relocate its Copenhagen research facilities to a site outside the city in late 2027.