The era of diesel dominance in off-highway equipment is undergoing a significant shift with the emergence of alternative fuels like hydrogen. Perkins Engines, along with Equipmake and Loughborough University, is spearheading Project Coeus to develop a multi-fuel, drop-in hybrid power unit. The project, led by Integrated Powertrain Engineering Manager Paul Moore, is a response to the challenge of diverse energy sources and aims to provide a seamless user experience regardless of the fuel used. The first prototype engine, based on the Perkins 1206 engine and powered by hydrogen, marks a major milestone in the project. Equipmake's hybrid system will ensure consistency in power delivery and efficiency gains, facilitating the adoption of alternative fuels. The collaboration with Loughborough University's diagnostic capabilities enables the engine to accommodate various fuels without the need for separate engines. Project Coeus represents a revolutionary step in the off-highway equipment industry, promising a future where heavy machinery operates efficiently on a range of fuels, including hydrogen.