As global efforts to combat climate change intensify, decarbonizing shipping and transport, especially in sectors like aviation and marine shipping, remains crucial. These sectors contribute significantly to global CO2 emissions and face challenges in electrification due to technical and economic limitations. Carbon-neutral eFuels made from green hydrogen offer a promising solution to reduce reliance on traditional fossil fuels. Various technologies like Fischer-Tropsch synthesis and synthetic methanol production are employed to create eFuels, ensuring a carbon-neutral outcome by capturing CO2 during production. Despite the potential of eFuels in decarbonization, scaling production poses challenges such as high energy requirements and sourcing low-cost CO2. Hitachi Energy is at the forefront of enabling large-scale green hydrogen production for eFuels through innovative solutions like the Grid-to-Stack approach. This comprehensive solution addresses power supply challenges in eFuel plants, ensuring safe and efficient operation while reducing the cost of hydrogen production. Hitachi Energy's collaboration with Arcadia eFuels in Denmark demonstrates the practical application of their expertise in advancing sustainable aviation fuels through eFuels production.