Vertiv APS5KPWRMOD1 5kVA Hot-Swap Power Module for Liebert APS
Overview
The APS5KPWRMOD1 is a 5kVA/4.5kW power module designed specifically for Liebert APS AS5 and AS6 series modular UPS systems. When a data center or network equipment room demands scalable, field-replaceable power capacity, this module slots directly into a compatible Liebert APS chassis — no full system replacement, no extended downtime. Browse the full Vertiv power protection catalog to see how this module fits within the broader Liebert APS product family.
Modular UPS architecture like the Liebert APS is built around the premise that individual power modules can be added or swapped without taking the load offline. The APS5KPWRMOD1 is the chassis-specific module for AS5 and AS6 frames — if you are working with an AS3 or AS4 frame, you need the APS5KPWRMOD2 instead. Getting this right at procurement prevents a costly and time-sensitive swap on the data center floor.
Key Features
- 5kVA/4.5kW Capacity per Module: Each module contributes 4.5kW of real power to the UPS output. In a multi-module chassis, capacity scales linearly — three modules in an AS6 frame means 13.5kW of available power, which covers dense 1U/2U server rows or mid-size network closets without overprovisioning a larger fixed UPS.
- AS5/AS6 Series Compatibility: The APS5KPWRMOD1 is frame-specific. It installs only in AS5 and AS6 Liebert APS chassis. Mixing module types across frame generations is not supported — confirm your chassis series before ordering. This specificity ensures the module's power bus, control logic, and monitoring interfaces are fully validated against the host frame.
- Hot-Swap Field Replacement: Modular UPS design means a failed power module can be pulled and replaced under load, provided remaining installed modules carry sufficient capacity. This changes a potential hours-long maintenance window into a minutes-long field swap — a meaningful operational advantage in 24/7 facilities.
- Scalable Redundancy Path: Adding a second or third APS5KPWRMOD1 to a partially populated chassis provides N+1 redundancy at the power module level. Size your chassis population to the load, then add one additional module — if any single module fails, the remaining units absorb the load without a transfer to bypass.
- Paired Battery Module Ecosystem: The Liebert APS battery architecture uses a two-bay-per-string design. The APSLIBATMODHU delivers one complete Lithium-Ion battery string (2 modules, 2 bays). The APSBATMODCU delivers one complete VRLA/lead-acid battery string on the same two-bay footprint. Both are sold separately. The modular UPS systems category includes compatible battery options for planning a full runtime configuration.
- 208/120 VAC Output: The module outputs dual-voltage 208/120 VAC, covering both standard 120V branch circuits and 208V single-phase loads — useful in mixed equipment environments where servers and storage run on 208V while AV or ancillary gear runs on 120V from the same UPS.
Integration and Compatibility
The APS5KPWRMOD1 installs into Liebert APS AS5 and AS6 series chassis only. The companion module for AS3/AS4 chassis is the APS5KPWRMOD2 — same 5kVA rating, different frame interface. When planning power protection infrastructure, verify the chassis series label on the existing frame before ordering modules. Runtime extension relies on separately purchased battery modules (APSLIBATMODHU for Lithium-Ion strings or APSBATMODCU for standard chemistry strings), each occupying two battery bays per complete string. A UPS battery module pairing plan should be scoped at the same time as module count to avoid underpowered runtime targets.
Frequently Asked Questions
Q: Which Liebert APS chassis is the APS5KPWRMOD1 compatible with?
A: The APS5KPWRMOD1 is designed for Liebert APS AS5 and AS6 series chassis only. For AS3 and AS4 series chassis, the correct module is the APS5KPWRMOD2.
Q: What is the power output of the APS5KPWRMOD1?
A: Each APS5KPWRMOD1 module delivers 5kVA / 4.5kW of power capacity at 208/120 VAC output.
Q: Can I mix APS5KPWRMOD1 and APS5KPWRMOD2 modules in the same chassis?
A: No. Each module type is frame-specific. APS5KPWRMOD1 is only for AS5/AS6 frames; APS5KPWRMOD2 is only for AS3/AS4 frames. Do not mix module types across chassis generations.
Q: What battery modules pair with the APS5KPWRMOD1 chassis?
A: The Liebert APS supports two battery string types: APSLIBATMODHU (Lithium-Ion, 2 modules per complete string, 2 bays per string) and APSBATMODCU (standard chemistry, 2 modules per complete string, 2 bays per string). Both are sold separately from the power module.
Q: How many APS5KPWRMOD1 modules are needed for N+1 redundancy?
A: Install enough modules to carry your full load, then add one additional module. For example, if your load requires 9kW, install three modules (13.5kW total capacity) so that any single module failure still leaves two modules at 9kW — covering the load without transferring to bypass.
Q: Is the APS5KPWRMOD1 hot-swappable?
A: Yes. The Liebert APS modular architecture supports hot-swap replacement of power modules, provided the remaining installed modules in the chassis can sustain the connected load during the swap.
The APS5KPWRMOD1 is a chassis-specific component, and that specificity is the first thing I check on every quote. At 5kVA/4.5kW per module and a dual-voltage 208/120 VAC output, this module is purpose-built for AS5 and AS6 frame populations — if the chassis label reads AS3 or AS4, you need the APS5KPWRMOD2, full stop. I have seen integrators order the wrong module and burn two weeks waiting for a corrected shipment while a rack sat unpowered.
Technical Highlights:
- 5kVA/4.5kW per Module: Capacity stacks linearly in a multi-module chassis — three modules yield 13.5kW, which comfortably handles a dense compute row or a mid-size network equipment room without the overhead of a monolithic UPS sized for peak-plus-margin.
- 208/120 VAC Dual Output: Covers mixed-load environments where servers pull 208V single-phase and ancillary gear runs on 120V branch circuits — a single module population serves both without additional transformers or separate UPS circuits.
- Hot-Swap Architecture: Power modules are field-replaceable under load as long as remaining module capacity covers the connected load. That turns a potential hours-long maintenance event into a sub-30-minute module swap with no load interruption.
Deployment Considerations:
- Battery runtime planning must happen at the same time as module count planning. Each complete battery string (APSLIBATMODHU for Li-Ion, APSBATMODCU for standard chemistry) occupies exactly two bays in the Liebert APS chassis — confirm bay availability before finalizing the BOM.
- N+1 redundancy requires one module beyond what the load demands. Do not populate a chassis to exactly the load ceiling — a single module failure at 100% population means full load transfer to bypass, which defeats the architecture's primary advantage.
This module is the right spec for facilities teams deploying or expanding Liebert APS AS5/AS6 frames in enterprise data centers, colocation suites, or large-footprint network operations centers where incremental capacity addition and field-level serviceability are operational requirements — not optional features.
