The European Green Plan represents much more than the not so easily achievable EU carbon neutrality by 2050. The changes it carries will completely transform the European economy. The challenges that will arise just in the field of energy emphasize how the implementation of the green transition will have to be given due attention, that the technical prerequisites for implementation will have to be considered, cooperation with the business, scientific and social community must be achieved, and finally, a large amount of investment will also be required. In order to accept a large number of new renewable energy sources on the grid, sufficient flexibility capacity will have to be provided to the grid. The grid itself will have to be reinforced so that energy can flow smoothly from areas with high energy production to areas with high consumption. Green hydrogen has emerged as an important new element in the energy sector, which plays a promising role in balancing the production of renewable energy sources. It will also be a major tool to enable the decarbonization of hard-to-decarbonize industries such as the steel and cement industries. Nuclear power plants, as a reliable source of basic low-carbon energy until now, are still part of the European energy future, but the nuclear industry will have to solve the problems of lengthy construction delays and budget overruns. Croatia also strongly participates in the implementation of projects to achieve climate neutrality. Currently, projects are being implemented that could provide flexibility to the power grid in Croatia. These are projects such as utility scale battery storage, virtual power plants and projects for the production and use of green hydrogen. Despite facing various challenges, all observed projects are moving forward, making their contribution to enabling and implementing the green transition in Croatia.