Vertiv Liebert EXM and APM Modular UPS: Specs, Sizing, and Service
The Vertiv Liebert EXM and APM are modular three-phase UPS systems for mid-size and growing data centers. The EXM and EXM2 span roughly 30 to 250 kVA with hot-swappable power modules and an integrated bypass, while the APM FlexPower architecture scales from about 30 to 600 kVA by adding modules. Both offer high efficiency and lithium-ion options. Comp-Utility, a long-standing Vertiv distribution partner, specs and services them across Central Texas.
What We Provide
Our Capabilities
Spec and Scale
We size the EXM or APM and configure hot-swappable modules and battery runtime for your load and redundancy target.
Learn moreInstallation and Commissioning
Installation, integration, and commissioning prove the modular system before it protects your load.
Learn moreMaintenance and Battery Service
Module and battery service plus preventative maintenance keep these systems efficient and available.
Learn morePay as You Grow
Modular Capacity for Mid-Size Data Centers
The EXM and APM let you scale capacity and redundancy by adding hot-swappable power modules, so you invest as load grows and gain N+1 without overbuilding. A module can be serviced while the system keeps protecting the load.
With high efficiency and lithium-ion options, these platforms balance flexibility, footprint, and total cost of ownership for data centers, healthcare, and commercial facilities.
Key Specifications
| Attribute | Liebert EXM / EXM2 | Liebert APM |
|---|---|---|
| Topology | Online, modular | Online, modular (FlexPower) |
| Power rating | 30 to 250 kVA | 30 to 600 kVA |
| Voltage / phase | 208 / 480V, three-phase | 208 / 480V, three-phase |
| Redundancy | Hot-swap modules, integrated bypass | Scalable power modules, N+1 |
| Batteries | VRLA or lithium-ion | VRLA or lithium-ion |
| Typical applications | Mid data centers, healthcare, commercial | Growing data centers, colocation |
Specifications reflect the Liebert EXM/EXM2 and APM product lines; exact ratings and configuration vary by model. Contact us to confirm the current configuration for your project.
The Comp-Utility Difference
Why Comp-Utility?
Long-Standing Distribution Partner
As a long-standing distribution partner of Eaton, Schneider Electric, and Vertiv, we specify best-in-class systems and back them with factory-grade service.
Engineer-Owned and Operated
Comp-Utility is owned and operated by engineers, with licensed Texas Professional Engineers (P.E.) on staff. That rigor anchors every design, specification, and installation.
Turnkey, Single-Contract Partner
We sell, design, install, and maintain complete infrastructure end to end. One accountable team and one contract for power, cooling, distribution, and cabling.
24/7 Emergency Response and Preventative Maintenance
Our technicians provide preventative maintenance programs and 24/7 emergency response, with rapid on-site dispatch across Central Texas when facilities need us most.
Licensed, Certified & Recognized
We hold ourselves to the standards of the institutions we serve, from professional licensure and jobsite safety to the industry organizations that set the bar for mission-critical work.
Licensed Professional Engineers
State of Texas (TBPE)
OSHA 30 Certified
Field Technicians
AFCOM Member
Data center industry association
7x24 Exchange Member
Mission-critical infrastructure
Frequently Asked Questions
What are the Vertiv Liebert EXM and APM?
They are modular three-phase UPS systems for mid-size and growing data centers. The EXM and EXM2 span roughly 30 to 250 kVA with hot-swappable power modules and integrated bypass, while the APM uses FlexPower architecture to scale from about 30 to 600 kVA. Both provide online protection with high efficiency and lithium-ion options.
How does modular scaling work on these systems?
Capacity and redundancy come from hot-swappable power modules. You install enough modules for the current load plus one for N+1 redundancy, then add modules as demand grows, up to the frame rating. A module can be replaced without dropping the load. This pay-as-you-grow model avoids overbuilding while preserving high availability.
What is the difference between the EXM and APM?
The EXM and EXM2 cover roughly 30 to 250 kVA and are a strong fit for mid-size data centers and healthcare, while the APM's FlexPower architecture scales further to about 600 kVA for growing data centers and colocation. Comp-Utility recommends the platform based on your capacity, growth, and footprint requirements.
Do the EXM and APM support lithium-ion batteries?
Yes. Both support VRLA and lithium-ion batteries. Lithium-ion offers longer life, smaller footprint, faster recharge, and higher temperature tolerance, lowering total cost of ownership. Comp-Utility specifies the chemistry and runtime that match your facility's needs and replacement-cycle preferences.
How do I size an EXM or APM?
Sizing is based on critical load, redundancy target, runtime, and growth. Because these are modular, a frame can be sized for future load and populated over time. Comp-Utility's engineers calculate the load, recommend the rating and module count, and size the battery to bridge to generator or restored utility power.
Can these systems be paralleled?
Yes. In addition to internal modular redundancy, the EXM and APM can be paralleled for greater capacity or system-level redundancy up to 2N. Comp-Utility designs the redundancy scheme to meet your data center tier goals and validates it through commissioning before the system carries load.
Who installs and services the EXM and APM in Central Texas?
Comp-Utility, a long-standing Vertiv distribution partner, specs, installs, commissions, and maintains the Liebert EXM and APM across Central Texas, including module and battery service and 24/7 emergency response. Call (512) 346-0999 or email sales@comp-utility.com.
What maintenance do these modular UPS systems require?
They require periodic battery testing, power module inspection, capacitor and fan replacement at end of life, connection and firmware checks, and verification of redundancy and bypass. A documented preventative maintenance program keeps the warranty valid and prevents avoidable downtime. Comp-Utility tailors the cadence to how critical the load is.
My UPS is in alarm, what do I do?
Call Comp-Utility right away at (512) 346-0999, and have the unit's model and serial number ready along with any alarm codes or messages shown on the UPS display. A unit in alarm can indicate a battery, load, or power-path issue that needs prompt attention. Because we maintain a large base of units under contract with the major UPS manufacturers, we can escalate directly to the right factory resources and coordinate service faster and more directly than a single end user calling general support, often getting you answers and a technician on site sooner.