Eaton BP36V42-3U – Expandable External Battery Pack
Eaton BP36V42-3U – Expandable External Battery Pack is backordered and will ship as soon as it is back in stock.
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Product Overview
The Eaton BP36V42-3U is a 36V external battery pack for rack UPS systems, designed to multiply available runtime on compatible Tripp Lite and Eaton SmartPro UPS units. As an expandable UPS battery pack rack-mount solution, it uses only 3U of rack space and installs in stacking, upright tower, or rackmount configurations. Facilities that need extended runtime battery for commercial UPS deployments, such as an AV rack that must survive an extended outage without shutting down, can daisy-chain multiple BP36V42-3U units to a single compatible UPS. Heavy-gauge cabling with a high-current DC connector is included for straightforward installation.
Product Description

The BP36V42-3U is a 36V DC battery pack for rack UPS systems specifically engineered to work alongside compatible Tripp Lite SmartPro units, including the SMART1500RMXL2U and SMX1500RTXL2U, rather than functioning as a standalone power device. Its multi-use form factor supports stacking configurations, upright tower placement, or standard 3U rack-mount installation, giving integrators flexibility when planning AV rack layouts that combine UPS, battery expansion, and connected equipment. An additional output connector allows multiple BP36V42-3U units to be daisy-chained together and connected to a single UPS, which is the standard approach for facilities that need substantially longer runtime than an internal battery alone can provide. Heavy-gauge cabling with a high-current DC connector is included, reducing the amount of separate cabling an installer needs to source. This 36V battery pack for AV rack UPS applications is a common upgrade path for conference room and broadcast racks that started with a base UPS unit but later determined their runtime requirements had grown, since it avoids replacing the primary UPS itself.
Key Features
- 3U Rack-Mount Form Factor — installs in a standard 19-inch rack alongside the primary UPS with included 4-post mounting hardware.
- Multi-Configuration Design — supports stacking, upright tower, or rack-mount installation depending on the facility's layout.
- Daisy-Chain Expansion — an additional output connector allows multiple battery packs to be connected to a single compatible UPS.
- Heavy-Gauge Cabling Included — high-current DC connector cabling ships with the unit for straightforward installation.
- Compatible with Select SmartPro UPS Systems — designed for Tripp Lite SmartPro units that specify this battery pack, including the SMART1500RMXL2U family.
Typical Applications
- Conference room AV racks requiring extended runtime beyond base UPS capacity
- Broadcast studio racks needing long-duration backup for critical equipment
- Government space AV and IT racks with extended outage requirements
- Boardroom AV racks supporting extended-runtime UPS configurations
Technical Specifications
| Specification | Value |
|---|---|
| Battery Voltage | 36V DC |
| Form Factor | 3U rack-mount; also supports stacking and upright tower configurations |
| Dimensions (D x H x W) | 33 x 12 x 23 in. |
| Weight | 174.1 lbs |
| Expansion | Daisy-chainable with additional BP36V42-3U units |
| Compatible Systems | SMART1500RMXL2U, SMX1500RTXL2U, and other Tripp Lite UPS systems that specify this battery pack |
| Warranty | 2-year limited warranty (U.S. and Canada) |
Frequently Asked Questions
Which UPS systems is the BP36V42-3U compatible with?
It is designed for use with the Eaton SMART1500RMXL2U and SMX1500RTXL2U, as well as other Tripp Lite UPS systems that specify this battery pack in their documentation.
Can multiple battery packs be connected to one UPS?
Yes. An additional output connector allows multiple BP36V42-3U units to be daisy-chained together and connected to a single compatible UPS for longer combined runtime.
What rack space does this battery pack require?
It occupies 3U of standard 19-inch rack space and includes 4-post mounting hardware, though it can also be installed in stacking or upright tower configurations.
Is cabling included for installation?
Yes. Heavy-gauge cabling with a high-current DC connector ships with the unit.
What is the warranty on this battery pack?
It carries a 2-year limited warranty in the U.S. and Canada; warranty terms may vary by country.
Can this battery pack be installed by AV integration staff without an electrician?
Contact Creation Networks for the complete manufacturer installation guidance; while the connectors are designed for straightforward installation, confirming compatibility with your specific UPS model beforehand is recommended.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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