Astero, PoriaMaki, KariEvens, CorentinPapadimitriou, ChristinaEfthymiou, VenizelosNiebe, AstridHolly, StefanieMarinelli, MattiaGabderakhmanova, TatianaMelendez, JoaquimHerraiz, SergioRodriguez-Sanchez, RaulMorch, AndreiDe Urtasun, Laura GimenezFernandez, GregorioDivshali, Poria Hasanpor2021Astero , P , Maki , K , Evens , C , Papadimitriou , C , Efthymiou , V , Niebe , A , Holly , S , Marinelli , M , Gabderakhmanova , T , Melendez , J , Herraiz , S , Rodriguez-Sanchez , R , Morch , A , De Urtasun , L G , Fernandez , G & Divshali , P H 2021 , Battery Storage Demonstration Projects An Overview Across Europe . in Proceedings of 2021 IEEE PES Innovative Smart Grid Technologies Europe : Smart Grids: Toward a Carbon-Free Future, ISGT Europe 2021 . Proceedings of 2021 IEEE PES Innovative Smart Grid Technologies Europe: Smart Grids: Toward a Carbon-Free Future, ISGT Europe 2021 , Institute of Electrical and Electronics Engineers Inc. , pp. 1-6 , 11th IEEE PES Innovative Smart Grid Technologies Europe, ISGT Europe 2021 , Espoo , Finland , 18/10/21 . https://doi.org/10.1109/ISGTEurope52324.2021.9640073conference978-1-6654-4876-59781665448758978-1-6654-4875-8researchoutputwizard: 11556/1269Publisher Copyright: © 2021 IEEE.This paper summarises results and experiences from several demonstration projects across European countries in the field of battery energy storage system (BESS) integration to the power system. These research projects are selected among research institutes and universities that are part of the European Energy Research Alliance (EERA) Joint Program on Smart Grids. The paper categorizes these projects according to the demonstrated applications of BESS and then reviews specific aspects of each project. This paper provides an opportunity to find out the summary of the most recent results as well as challenges and open research questions in projects focusing on different BESS application in the power system.6enginfo:eu-repo/semantics/openAccessconference output10.1109/ISGTEurope52324.2021.9640073Ancillary servicesBattery storage systemDemonstration projectsGrid integrationRenewable Energy SourcesAncillary servicesDemonstration projectsBattery storage systemGrid integrationRenewable Energy SourcesComputer Vision and Pattern RecognitionInformation Systems and ManagementEnergy Engineering and Power TechnologyRenewable Energy, Sustainability and the EnvironmentElectrical and Electronic EngineeringArtificial IntelligenceSDG 7 - Affordable and Clean Energyhttp://www.scopus.com/inward/record.url?scp=85175225798&partnerID=8YFLogxK