Vertiv APS Batt MOD CSB UPS 12460 F2 FR - APSBATMODCU

Vertiv APSBATMODCU UPS Battery String Module for Liebert APS

Overview

The Vertiv APSBATMODCU is a drop-in battery replacement module designed specifically for the Liebert APS uninterruptible power supply family. Each kit ships with two battery modules that together form one complete battery string — the fundamental runtime unit in any Liebert APS deployment. If you're expanding runtime capacity or replacing aging cells in an existing APS chassis, this is the lead-acid chemistry option; Vertiv's UPS and power protection lineup also includes the APSLIBATMODHU for facilities that have standardized on Lithium-Ion.

The grey modular form factor slots directly into the bay architecture of the Liebert APS, making field replacement straightforward without requiring a full UPS swap. Understanding the two-bay-per-string constraint is essential before ordering: a single APSBATMODCU populates both bays assigned to one string, so runtime scaling requires additional strings, each occupying another two bays in the chassis.

Key Features

• Two-Module String Kit: Each APSBATMODCU contains exactly 2 battery modules that together constitute one complete battery string. You're not buying individual cells — you're buying a field-ready string assembly, which simplifies ordering and reduces installation error on runtime expansion projects.
• Liebert APS Bay Architecture: One complete string consumes 2 bays in the Liebert APS chassis. Before ordering, audit your APS for available bay slots — a fully populated chassis has no room for additional strings without a capacity upgrade.
• Lead-Acid Chemistry (Standard): The APSBATMODCU uses conventional sealed battery modules rather than Lithium-Ion. This matters for facilities with existing VRLA maintenance protocols, temperature-controlled battery rooms, and disposal contracts already in place — no new chemistry handling procedures required.
• Li-Ion Alternative Available: If your facility is moving toward longer calendar life, reduced weight, or higher charge-cycle tolerance, the APSLIBATMODHU provides the same 2-module / 1-string configuration with Lithium-Ion chemistry — a direct swap within the same APS bay system.
• Grey Enclosure: The module's grey finish matches standard Liebert APS data center and network room aesthetics, keeping mixed-battery deployments visually consistent in raised-floor and row-based installations.
• Modular Replacement Architecture: Because the APSBATMODCU is a discrete string module rather than a monolithic battery pack, you can replace individual strings at end-of-life without disturbing parallel strings still in service — reducing planned downtime windows for UPS battery maintenance.

Integration and Compatibility

The APSBATMODCU is designed exclusively for the Liebert APS series UPS platform. Confirm your APS chassis model (AS3, AS4, AS5, or AS6 series) and verify available bay count before ordering. Note that power module compatibility varies by series — the APS5KPWRMOD1 serves AS5 and AS6 while the APS5KPWRMOD2 serves AS3 and AS4 — but both series share the same two-bay-per-string battery architecture that the APSBATMODCU populates.

For facilities planning a chemistry migration, the APSLIBATMODHU occupies identical bay positions within the same Liebert APS enclosure, so a phased transition from lead-acid to Lithium-Ion strings is architecturally feasible — consult Vertiv's integration documentation for mixed-chemistry operational guidance before proceeding.

Integrators managing multi-UPS deployments should also evaluate UPS monitoring and management infrastructure to track per-string health and schedule proactive replacements before runtime capacity degrades unexpectedly.

Frequently Asked Questions

Q: How many battery modules are included with the APSBATMODCU?

A: The APSBATMODCU includes 2 battery modules, which together form one complete battery string for the Liebert APS.

Q: How many chassis bays does one APSBATMODCU string occupy?

A: Each complete battery string (one APSBATMODCU kit) uses 2 bays in the Liebert APS chassis. Plan your bay inventory accordingly before ordering additional strings.

Q: What is the difference between the APSBATMODCU and the APSLIBATMODHU?

A: Both provide 2 battery modules forming one complete string and occupy 2 bays in the Liebert APS. The APSBATMODCU uses standard (lead-acid) battery modules; the APSLIBATMODHU uses Lithium-Ion modules. Chemistry choice affects service life, weight, temperature performance, and disposal requirements.

Q: Is the APSBATMODCU compatible with all Liebert APS series?

A: The APSBATMODCU is designed for the Liebert APS platform. Verify your specific chassis model (AS3, AS4, AS5, or AS6 series) and available bay slots before ordering. Consult Vertiv documentation for per-model compatibility confirmation.

Q: Can I mix APSBATMODCU and APSLIBATMODHU strings in the same APS chassis?

A: Both module types use the same 2-bay-per-string architecture within the Liebert APS. However, mixed-chemistry operation should be validated against Vertiv's current integration documentation before deployment — do not assume interoperability without confirmation.

James Everett

The APSBATMODCU is structured around a hard architectural constraint that catches integrators off guard: one kit equals one string, and one string always consumes exactly 2 bays in the Liebert APS — no exceptions. Before I spec this module into a runtime expansion project, I audit the chassis bay count first. Ordering an extra APSBATMODCU without confirming available bays leaves you with modules sitting on a shelf.

Technical Highlights:

• 2-Module String Assembly: The kit ships as a pre-configured 2-module string, not loose cells. This eliminates field-assembly error and makes the replacement procedure consistent whether it's the first string or the fourth.
• 2-Bay Chassis Footprint: Each APSBATMODCU string occupies exactly 2 Liebert APS bays. Runtime scaling is linear — count your open bays, divide by 2, and that's your maximum additional strings.
• Lead-Acid vs. Li-Ion Parity: The APSBATMODCU and APSLIBATMODHU occupy identical bay positions, so a facility that wants to migrate chemistry string-by-string can do so incrementally within the same enclosure — useful for phased capital refresh cycles.

Deployment Considerations:

• Confirm available bay count in the target Liebert APS chassis before placing the order — a fully populated unit has zero room for additional APSBATMODCU strings without a chassis expansion.
• Lead-acid modules require appropriate disposal handling at end-of-life. If your facility lacks existing VRLA disposal contracts, factor that cost into the total replacement budget, or evaluate whether the APSLIBATMODHU's chemistry profile better suits your site's long-term maintenance posture.

The APSBATMODCU is the right call for data center and critical-infrastructure facilities already running Liebert APS systems on lead-acid chemistry where operational continuity, familiar maintenance procedures, and string-level replaceability matter more than weight savings or extended cycle life.