Check the listing for details. Tripp Lite BP24V28-2U 24V 2U Rackmount External Battery Pack for UPS. Color: Black, Condition: Open box. Listed at 495.00 USD. Description BP24V28-2U rack-mount external battery pack offers extended battery runtime when used in conjunction with expandable 24V rack-mount UPS systems. Includes heavy-gauge cabling with high-current DC connector for safe, simple installation. Included mounting accessories support 2U rack-mount installation in 4-post racks. Options for 2-point front-rail mounting, 2-post center-mounting and wall-mount installation available. Compatible with SMART750RMXL2U, SU750RTXL2U, SU1000RTXL2UA, SUINT1000RTXL2UA and other UPS systems that specify the use of this battery pack. Features ● Offers extended-run UPS operation when used in conjunction with compatible 24V DC UPS systems ● Includes heavy-gauge cabling with high-current DC connectors for simple installation ● Included mounting brackets support rack-mount installation in 4-post racks using only 2 rack spaces (2U) ● UPDHDEARKIT option supports two-point front-rail rack-mount installation without rear supports ● 2POSTRMKITWM option supports balanced two-point center-mounting in 2-post equipment racks ● 2POSTRMKITWM option also enables wallmount installation ● NOTE: LIMIT OF 1 BP24V28-2U PER UPS,