BP72V18-2US rack/tower external battery pack offers extended battery runtime when used in conjunction with expandable 72V Tripp Lite rack mount or tower UPS systems. Includes heavy gauge cabling with high current DC connector for safe, simple installation. Included daisy chain connector enables the connection of additional compatible 72V external battery packs to the host UPS. Included mounting accessories support 2U rack mount installation in 4 post racks. Options for 2-point front-rail mounting, 2 post center-mounting, wall mount and upright tower installation available. Compatible with these UPS Systems - SMART3000RMOD2U, SU3000RTXL2U, SU3000RTXL3U, SU3000RTXL3UHV, SU3000RTXLCD2U, SU3000RTXLCD3U, SU3000RTXR3U, SU3000RTXR3UHW, SU3000XL, SU3000XLCD, SUINT3000RTXL2U, SUINT3000RTXL3U and other Tripp Lite UPS systems that specify the use of this battery pack.