Newlight’s marine engine hydrogen retrofit package clears factory acceptance testing

November 6, 2025 |

In California, Newlight announced completion of factory acceptance testing for its hydrogen retrofit system for marine engines, approved by classification society RINA. The system is designed for both two- and four-stroke engines and integrates with existing vessel infrastructure, offering shipowners a pathway to reduce emissions without waiting for newbuilds.

Partners in the development include RINA, lomarlabs, AURELIA, and Lomar Shipping. Newlight, based in San Francisco, says the retrofit package offers a practical approach to decarbonizing the existing fleet.

Next up is harbor acceptance testing. While most maritime hydrogen concepts remain at the drawing board, this retrofit system has cleared a key milestone. Newlight says it’s not pitching theory but offering “validated fact ready for your fleet.”

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Category: Sustainable Marine Fuels

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