Backup Power & Grid Support are core value drivers in modern Battery Energy Storage System (BESS) projects across Europe. Backup power ensures uninterrupted electricity supply during grid outages, voltage drops, or peak demand events, protecting critical loads such as industrial facilities, commercial buildings, data centers, and renewable energy plants. Grid support enhances overall system stability by providing frequency regulation, voltage control, peak shaving, load shifting, and congestion management. As Europe accelerates renewable integration and grid decentralization, energy storage plays a vital role in improving grid resilience and reducing reliance on fossil-fuel peaker plants. For European BESS developers and C&I energy users, backup power and grid support services increase energy security, optimize electricity costs, and generate additional revenue streams through ancillary services markets.