The European Commission’s Long-Term Strategy describes a number of pathways that reach between 80% and 100% decarbonisation levels. In every pathway a high level of direct and indirect electrification is envisaged, supported by a large-scale deployment of RES. The European power system has to address the residual load variability, on all timescales: from frequency response to inter-year flexibility. The main candidate solutions to provide flexibility are networks, demand-response, dispatchable and flexible power generation technologies, and energy storage. The appropriate deployment of innovative energy storage technologies is of primary importance for the clean energy transition. Sustainability and circular economy approach for storage innovations will minimize the environmental footprint and enhance the overarching efforts for achieving the European Green Deal targets. SINNOGENES project aims to develop the Storage INNOvations (SINNO) energy toolkit, a complete framework of methodologies, tools and technologies that will enable the grid integration of innovative storage solutions beyond the state-of-the art, while demonstrating sustainability, technical performance, lifetime, non-dependency on location geographical particularities and cost. It will develop successful energy storage business cases and systems and deploy them in innovative and 'green' energy systems at different scales and timeframes. SINNOGENES will target the effective integration of innovative energy storage systems and value chains at the interface of renewable energies and specific demand sectors, while ensuring the compatibility of systems and standards of distributed energy storage for participation in flexibility markets. Six pilot projects will take place in Portugal, Spain, Germany, Greece and Switzerland while a detailed scalability and replicability analysis will prove the wide impact of SINNOGENES project innovations at pan European level.