The ambitious plan for an energy transition in Europe now seeks to achieve a low-carbon climate-resilient future in a safe and cost-effective way, serving as an example worldwide. In many European countries, the phase out of nuclear and coal generation has started with a transition to new renewable sources comprising mainly of solar and wind for electricity generation. However, solar and wind are variable energy sources and difficult to align with demand. Hydropower which strongly contributed during the last century to industrial development and welfare, provides high flexibility and storage services required for ensuring energy security and delivering more solar and wind power onto the grid. Hydropower has all the characteristics to serve as an excellent catalyst for a successful energy transition. Building from this extensive programme of consultation, the Hydropower Europe Forum (https://hydropower-europe.eu/) has developed from 2018 to 2022 a Research and Innovation Agenda (RIA) as well as a Strategic Industry Roadmap (SIR). The Consortium is particularly motivated (1) to integrate its RIA and SIR into the Strategic Energy Technology (SET) Plan roadmap establishing links with national authorities and (2) to consolidate its strong networks into a sustainable association serving not only the hydropower sector but the whole renewable energy sector contributing towards the European Green Deal. Built on the more than 600 stakeholders representing all sectors, who actively participated through the Hydropower Europe Forum, ETIP HYDROPOWER will further align and coordinate the industry RIA and SIR strategies to provide consensus-based strategic advice to the SET Plan covering analysis of market opportunities and R&I funding needs, biodiversity protection and ecological continuity. Another goal is, in one with Europe and the latest EU climate and energy related policies, deepening the understanding of innovation barriers and exploitation of research results.

The transformation of Europe’s energy system creates both challenges and opportunities for the hydropower sector. Hydropower needs to seek out value within the electricity market aligned with other sources of renewable and sustainable energy, whilst operating and building plants in environmentally sensitive and acceptable ways. The call H2020 LC-SC3-CC-4-2018: “Support to sectorial fora”, item 2: “bringing together stakeholders of the hydropower sector in a forum” provides a unique opportunity to bring together the hydropower community and to develop a Research and Innovation Agenda, and a Technology Roadmap mapping implementation of that agenda. These will support implementation of research and innovation for new hydropower technologies and innovative mitigation measures. The HYDROPOWER-EUROPE project delivers these objectives through an extensive programme of stakeholder consultation. The consortium brings together six different associations and networks spanning the whole research and industry value chain. These networks, along with representatives of civil society and European and national authorities, will form the initial stakeholder consultation base. Through an extensive, cyclic programme of consultation – both online and through various regional, European and International workshops – research needs and priorities will be established supporting development of the Hydropower Research and Innovation Agenda. The consultation process also facilitates discussion around issues and perceptions affecting the implementation of hydropower in Europe. Conclusions from this will underpin development of the Technology Roadmap, addressing any issues affecting uptake of the research and innovation agenda. Finally, the HYDROPOWER-EUROPE project will also consider ways in which the forum, established through this initiative, may become sustainable beyond the 3-year project programme, so supporting uptake and implementation of the research and innovation agenda.

STOR-HY aims to minimize CAPEX, OPEX for innovative pumped storage projects. This is achieved by enhancing the lifetime and recyclability of components and equipment, and devising operation strategies for unconventional schemes through sensor-based condition monitoring systems. These systems detect early failure mechanisms, enabling the postponement of unnecessary maintenance actions and avoiding unplanned outages. Furthermore, strategic use of digital tools for operational management is employed to improve efficiency, reliability, and availability of Pumped Storage Plants. Considering energy and market demand dynamics, variable renewable generation, and integration, STOR-HY addresses climate change effects and enhances flexibility and resilience of the EU energy grid. The project focuses on optimizing plant availability, offering increased storage potential, peak shaving, fast response regulation, and ancillary services for grid resilience. The integration of digital tools, real-time controllers, monitoring strategies, and predictive maintenance algorithms is consolidated in a Cyber-physical platform for Advanced Decision Support (CADS). This platform, along with high-tech computational models, enables the realistic estimation of critical component degradation in short- and long-term operations. This information supports informed decision-making in PSP operation and aids in the design of innovative control strategies for challenging conditions. These developments result in a broader operating range and increased flexibility in EU hydropower generation and storage potential. STOR-HY prioritizes building regional connections with local stakeholders, industry, academia, and policy institutions. Sustainability considerations encompass environmental, circularity, economic, and social aspects, drawing insights from previous projects. These insights include on-site impacts, societal acceptance, ecological concerns, and LCC.

Hydropower and storage capacity need to increase to meet the need for renewable and dispatchable power generation. According to IEA, worldwide hydro-power capacity should increase from 1,360 GW in 2021 to 1,563–1,782 GW by 2030 and up to over 2,500 GW in 2050. At the same time, hydropower refurbishment projects must implement modern sustainability standards that preserve biodiversity and contribute to climate change mitigation and adaptation. The main objective of ReHydro is to demonstrate how European hydropower can be refurbished and modernized to be fit for a leading role in the future power system respecting sustainability requirements and societal needs in a climate change context. A suite of monitoring and digital tools (performance, cavitation, machine health) implemented at demonstration sites will improve hydropower efficiency. Innovative concepts like retrofitting with pumped hydro and hybridization will make hydropower fit for future markets. ReHydro will demonstrate how biodiversity can be improved with new fish-friendly turbines, re-establishment of environmental flows, and monitored using new tools such as eDNA. Smarter use of water resources will also be implemented so that more services can be delivered to the power markets, while multi-purpose use of the water resources for navigation and recreation can be expanded and the ability to mitigate flooding and droughts is strengthened. The results from ReHydro will achieve all the expected outcomes specified in the call. The solutions will give European hydropower industries commercial advantages to utilise the global need for hydropower expansion. It is expected that ReHydro's exploitable results will create 700–1150 new jobs in the manufacturing industry, increasing the global market by 275 mill euros. ReHydro will introduce a new paradigm to boost European leadership and competitiveness in the hydropower industry and provide new sustainable solutions that are replicable at European and global levels.