As the world intensifies efforts to combat climate change, decarbonizing transportation, especially sectors like aviation and marine shipping, remains a critical challenge. Electrification is not always feasible in these domains, leading to increased interest in carbon-neutral eFuels produced from green hydrogen. These eFuels offer a pathway to significantly reduce CO2 emissions, with applications in heavy-haul trucking as well. Various production methods such as Fischer-Tropsch synthesis and synthetic methanol are being explored, with synthetic ammonia also gaining traction as a sustainable alternative for Heavy Fuel Oil (HFO) in marine shipping. Despite the promise of eFuels, challenges like high energy input requirements and sourcing low-cost CO2 at scale need to be addressed. Hitachi Energy's innovative Grid-to-Stack approach is streamlining large-scale eFuel projects by providing comprehensive power supply solutions, ensuring efficient and safe operations. Their recent collaboration with Arcadia eFuels to develop the world's first commercial eFuels production facility for sustainable aviation fuels in Denmark showcases the growing momentum towards green hydrogen-based eFuels in the global transport sector.