We are a total of eight (8) projects funded under the 2022 EIC Pathfinder Challenge call “Mid to long term and systems integrated energy storage”. The Portfolio Work Package is designed to share information between us and explore points of cooperation, which, providing we are developing very related systems, makes a lot of sense and it is expected to prove being very useful for all of us. The main objectives of the Portfolio activities are the following: 1) Explore synergies and collaborations among the projects of the portfolio; 2) Produce comparative techno-economic analyses with common metrics and benchmarking with alternative options for energy storage; 3) Identify the key stakeholders of the innovation ecosystem; 4) Define common strategies for commercialization/exploitation and for communication activities; 5) Elaborate a roadmap (or action plan) of portfolio and sub-portfolio activities.