Uninterruptible Power Supplies (UPS)

Liebert EXL S1

The new Liebert EXL S1 is a monolithic, transformer-free UPS that features optimized, industry leading footprint and power per square foot, excellent operating efficiency, robust electrical protection and intelligent paralleling that optimizes performance at partial load to achieve superior cost savings. Available in single module and distributed bypass configurations. Compatible with lithium ion battery systems.

Best Suited For
  • Banking, Financial and Insurance
  • Data Center/Colocation/Hosting
  • Healthcare
  • Government
One Year Limited Warranty Against Defects in Material and Workmanship
How to buy


The EXL S1 UPS is available in 625, 750, 800, 1000, 1100 & 1200 kVA ratings and is optimized for maximum efficiency and power density. It offers the smallest footprint available for its kVA size range and is up to 59% smaller than some competitors. It is also significantly smaller than previous UPS generations offered by Vertiv. It continues the lineage begun with the European Liebert 80-EXL and North American Liebert EXL UPS platforms and is optimized for North American 480 Volt UL standards. For the conscientious buyer who needs every square foot to offer a positive ROI, such as for colocation providers, hosting and cloud businesses, the Liebert EXL S1 UPS allows customers to either redeploy the saved space to implement more revenue generating IT equipment or reduce the actual design size of their equipment rooms, thus saving construction costs. The new touchscreen control panel ensures Status At A Glance convenience, flexible views and multiple security options. Intelligent controls and communications integrate with Liebert Nform, SiteScan and the Trellis Platform as well as 3rd party BMS and DCIM systems. LIFE Services provides 24x7 remote monitoring by our expert staff to improve availability and lower labor costs. The Liebert EXL S1 UPS is fully compatible with the lithium ion battery solutions offered by Vertiv.


Smallest footprint among all competitors at this kVA size
High efficiency of up to 99% in Eco Mode and 97% in double conversion mode
Advanced touchscreen control panel
Lithium ion battery compatible
Up to 8 units can be paralleled 
Intelligent paralleling mode
High Impedance DC Ground Fault detection for 2014 NEC compliance
Dual asynchronous source / dual input capable


Allows more space for revenue generating I.T. equipment by minimizing UPS footprint
Maximizes active power at unity power factor
Reduces operating expenses
Installation flexibility
Reduces total cost of ownership
Zero impact on upstream infrastructure
Compatible with modern mission critical loads
Delivers proactive remote services

Services & Support


Remote Services LIFE™ Services
Preventive Maintenance Liebert UPS Preventive Maintenance

Frequently Asked Questions
Is this UPS configurable?
Yes, the UPS is fully configurable at time of order.
Does this UPS work with lithium ion batteries?
Yes, it works with all manufacturers of lithium ion batteries sold by Vertiv.
Does this UPS come with a communications card?
Yes, we provide a standard LIFE Services card or you may choose an optional Unity dual simultaneous protocol card.
Does this UPS offer Eco-mode?
Yes, it offers Vertiv's unique Eco-mode which maintains battery charging and inverter readiness.
Can I change display and alarm values or does a service technician have to do it?
Yes, our standard touchscreen control panel is fully user configurable for type of information displayed, security access codes and warning & alarm parameters.


Sales In USA Change Location
Gwyn Sales, Inc.
Email Contact +1 865 588 3147 Fax +1 865 675 2329
11230 Gilbert Drive Knoxville Tennessee 37932 USA
Product areas of focus: Uninterruptible Power Supplies (UPS), Power Distribution, Power Transfer Switches, Thermal Management, Integrated Solutions, Racks and Containment, Monitoring
Support Change Location
Vertiv (Liebert Services)
610 Executive Campus Drive Westerville Ohio 43082 USA
Product areas of focus: Uninterruptible Power Supplies (UPS), Power Distribution, Thermal Management, Integrated Solutions, Racks and Containment


Edge Computing

Single Phase UPS Selector

The interactive UPS selector (single phase) enables the filtering and comparison of different UPS models, based on your requirements. Includes offerings from 350 up to 10,000 VA.

Data Center / Colocation / Hosting

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Data Center / Colocation / Hosting

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Availability & Uptime

The Quick Configure & Deliver Program Delivers a Liebert EXM UPS 10-40kVA Fast

The Quick Configure & Delivery program is for you. Just pick the configuration needed. We’ve featured many 10-40kVA models of this award winning UPS.

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