Power-to-X-technologies in transport really come into their own when long ranges or heavy loads are required. Apart from long-distance rail and road transport, shipping and aviation could be potential markets. PtX technologies can make a significant contribution towards climate protection. In order for this to happen, one of the key elements is to successfully establish electrolysis for the production of green hydrogen. Investment in the development of electrolysis plants and notably current electricity generation costs are barriers which need to be overcome if the hydrogen generated in this way is to be competitive.