Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
+1 (773) 869-1776
+1 (773) 869-1329

±120VDC External Battery Cabinet for Select 10-50K S3M-Series 3-Phase UPS - Requires 40x 40Ah Batteries (Not Included)

External battery pack provides extended backup runtime for select Tripp Lite 10-50K S3M-Series 3-phase UPS systems.

  • Ideal for IT applications requiring high capacity, high availability and longer runtime
  • Supports daisy-chaining to additional battery packs of same model for even more runtime
  • Steel cabinet with locking door for easy access to user-installed VRLA (AGM) batteries
  • Fuses and output breaker protect against potentially hazardous overcurrent
  • Pre-installed rolling casters allow easy adjustment at installation location
  • 1-year limited warranty

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Tripp Lite Part Number

BP240V40L-NIB New

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±120VDC Battery Cabinet Gives Your Compatible 3-Phase UPS Extended Runtime
This external battery pack connects to a compatible SmartOnline® S3M-Series 3-phase UPS system to provide long-lasting battery backup for data centers, telecommunications, networks, industrial facilities, security, emergency systems and other mission-critical applications that require high capacity, high availability and extended runtime. In addition to battery backup and extended runtime, the BP240V40L-NIB can also be daisy-chained to other external battery cabinets for even longer extended-run operation.

Rugged Steel Construction Designed to Last in Demanding IT Applications
The cabinet is made from heavy-gauge steel with a baked powder-coated finish that helps prevent chipping and corrosion. The hinged front door provides easy access to the user-installed internal batteries. The door locks securely to help prevent damage, tampering or theft. Fuses and output breaker protect against potentially hazardous overcurrent. 

Ships Ready for Immediate Battery Installation
Pre-installed rolling casters allow easy adjustment at the installation location. Adjustable levelers support secure long-term deployment on a stable surface. All required internal battery cabling is included. External battery cables feed into the cabinet through conduit knockouts built into the bottom panel.

Typical Applications

  • Extend the runtime of your compatible Tripp Lite UPS system to maintain operation during all power conditions
  • Daisy-chain to additional battery cabinets to provide even longer extended-run operation for backing up essential equipment
  • Customize your application with the internal batteries of your choice

Package Includes

  • BP240V40L-NIB External Battery Cabinet for Select 10-50K S3M-Series 3-Phase UPS
  • (2) External battery cables, 3 m
  • (16) Internal battery cables
  • (28) Copper jumper bars
  • Owner’s manual

System Requirements

Tripp Lite 3-phase 208V UPS models S3M10K-NIB, S3M15K-NIB, S3M20K-NIB, S3M25K, S3M30K, S3M50K or other UPS specifying compatibility

RoHS compliant


UPC Code037332257710
Input Phase3-Phase
Expandable Battery RuntimeMultiple battery packs can be daisy-chained to the UPS for extended runtime
Expandable RuntimeYes
DC System Voltage (VDC)+/- 120VDC
UPS ConnectionHardwire (contractor supplies wiring - see Owner's Manual for gauge recommendations and complete installation instructions)
Material of ConstructionSteel
External Battery Pack Form FactorTower
Rack Height0U
Shipping Dimensions (hwd / in.)71.10 x 28.90 x 38.80
Unit Dimensions (hwd / in.)63.0 x 23.6 x 33.5
Unit Weight (lbs.)346.4
Product Warranty Period (Worldwide)1-year limited warranty

Questions & Answers

More Q&As may be available on the BP240V40LNIB model support page.

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+1 (773) 869-1776

Mon - Fri: 8 AM - 5:30 PM CST
+1 (773) 869-1234

Tripp Lite
1111 West 35th Street
Chicago, Illinois 60609
United States

+1 (773) 869-1111 Main
1 773.869.1329 Fax

Business Hours
8 AM - 5:30 PM CST

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Need help with your purchase?
We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at +1 (773) 869-1776 or email