TRIPP LITE's BP48V27-2US rackmount external battery pack offers extended battery runtime when used in conjunction with expandable 48 V Tripp Lite's rackmount UPS systems. Includes heavy gauge cabling with high current DC connector for safe, simple installation. Included daisychain connector enables the connection of additional compatible 48 V external battery packs to the host UPS. Included mounting accessories support 2U rackmount installation in 4 post racks.