Important projects of common European interest (IPCEI) are becoming a major tool for the deployment of hydrogen technologies in the European Union.
VERBUND, the largest producer of renewable energy in Austria, is developing a project of pan-European interest in the production, transport, and use of green hydrogen. This project will significantly improve green hydrogen decarbonization - for the benefit of industrial consumers and the mobility sector. It includes all countries along the Danube, including Bulgaria. More information about the project can be found at Green Hydrogen @ Blue Danube.
You can find the definition and rules of IPCEI here.