Data centers are high-energy-demand facilities with extremely strict requirements for power quality and reliability. Battery energy storage systems are primarily used in data centers for demand charge management and power quality optimization. Operators can effectively reduce peak load and lower electricity costs with BESS for peak demand control. Compared with traditional lead-acid UPS systems, liquid-cooled all-in-one energy storage cabinets offer higher energy density and significantly reduce floor space requirements in server rooms. Thanks to their intelligent EMS control, our energy storage systems can also support grid frequency regulation services, enabling data centers to enhance energy efficiency and unlock additional value from their power infrastructure.