A BESS storage system is an integrated energy system that combines batteries, power electronics, control software, and supporting infrastructure to store, convert, and dispatch electrical energy in a controlled and optimized manner. . Battery Energy Storage Systems (BESS) are increasingly described as a cornerstone of modern energy infrastructure. However, many discussions still reduce BESS to a simple concept—“a large battery connected to the grid. ” This oversimplification obscures the real value and complexity of a BESS. . In 2025, utility-scale battery storage is projected to expand by a record 18. 2 GW, following a historic 10. 3 GW added in 2024. These systems play a crucial role in balancing supply and demand, enhancing grid stability, and supporting the integration of renewable energy. discharging the electricity to its end consumer. The number of large-scale battery energy storage systems installed in the US has grown exponentially in the. .
