Successful TAT moves Everllence’s ME-LGIA ammonia engine closer to sea trials

Written by Nick Blenkey

ME-LGIA ammonia engine TAT will be the final one at the RCC in Copenhagen before its location is moved outside the city in late-2027. [Photo: Everllence]

Everllence reports that its ME-LGIA ammonia-burning engine has successfully completed its Type Approval Test (TAT) at the company’s Research Centre Copenhagen (RCC). Eight classification societies oversaw the testing that took place June 10-12, 2026, marking the latest phase in the engine’s journey towards its market debut.

“The TAT is yet another important step as we definitively move from concept development to seagoing engine operation,” said Bjarne Foldager, head of two-stroke business, Everllence. “It confirms the Everllence B&W ME-LGIA as ready for on-board 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.”

Everllence officially launched the ME-LGIA engines at a two-day event in Copenhagen in November 2025. Using the Diesel principle and the well-known, dual-fuel Liquid Gas Injection concept, the engine has a proven track record of several hundred thousand operational hours.

Everllence unveils its ME-LGIA two-stroke ammonia engine at Copenhagen event

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,” said Ole Pyndt Hansen, senior vice president, head of two-stroke R&D, Everllence. “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.”

Everllence also notes that the ME-LGIA ammonia engine TAT marks the end of an era with it being the final TAT at the RCC in Copenhagen before the company moves location to outside the city in late-2027.