In 2019 the Danish electricity production sat an impressive record of emitting only 135 g CO2 per kWh produced. This can to a large degree be attributed to the high percentage of electricity produced by wind turbines in the Danish electricity grid. To further reduce the amount of CO2 emitted, oil- and gas-based technologies must be phased out, and the amount of electricity from wind further increased. Achieving the latter depends on three things: • Increasing the number of wind turbines installed measured in GW • Ensuring that the installed wind turbines run as effectively as possible (Valkyrie) • Minimising the amount of down-time per wind turbine (Valkyrie) Valkyrie will significantly influence two out of these three points by developing maintenance technologies that will significantly reduce the time required for blade repairs and will furthermore ensure up to 10 % increase in efficiency of a turbine after maintenance, measured over 10 years. The technology of the project has already been validated at a TRL 5 but bringing it to a TRL 8 ready for market entry will require several further developments in e.g., adaptability, coating materials, and drone steering (DTI & REBLADE). The initial trials have attracted great interest from several of the big players in the wind energy industry as can be seen by the support in the project. This close collaboration with the end-users Nordic Access will ensure fast market entry and a high impact on the energy efficiency of electricity produced by wind turbines. The Proposed solution for fast and efficient maintenance of wind turbines is based on first-ever repairs on the blade by a drone while the blade is locked in the horizontal position. This eliminates the requirement of time-consuming and risk-filled manual repairs. Furthermore, the project will develop polyurea coatings beyond the present state of the art by Teknos, ensuring that the upgraded blade will run with higher efficiency than before the maintenance. Valkyrie gives energy efficiency improvement of up to 4029 TJ/year in Denmark alone, which is about 1/3 of all electricity produced with coal and oil combined. Assuming this is replacing electricity produced by oil, this corresponds to a reduction of 865,195 tons CO2 emissions in Denmark alone. Expanding the technology to even a fraction of the 743 GW of wind turbines installed worldwide would multiply this number several times, not to mention the numerous GW of new wind power to be added to the grid in the year to come. The business case presented with Valkyrie will ensure job creation and access to a huge export market for the Danish industry and will thereby be an important step in the process of keeping EU in front of the development of renewable energy and job creation.