Transformer-Free IGBT Architecture
Full-IGBT three-level power conversion provides a high-density transformer-free architecture for modern critical loads.
Vertiv Liebert EXL S1 is a high-density, transformer-free monolithic UPS designed for medium-to-large data centres and other mission-critical applications. The current technical range extends from 300 to 1250 kW and combines three-level IGBT power conversion, high operating efficiency, intelligent paralleling and flexible battery integration.
Conceptual illustration — Vertiv Liebert EXL S1 high-power UPS conversion, bypass and battery architecture
Vertiv Liebert EXL S1 is a monolithic, transformer-free UPS platform designed for medium-to-large data centres and other high-capacity mission-critical environments.
Current Vertiv technical documentation covers 300, 400, 500, 600, 800, 1000, 1200 and 1250 kVA/kW configurations, providing a broad capacity range within the same EXL S1 platform.
A full-IGBT three-level power architecture is used for both the rectifier and inverter. This supports high operating efficiency together with strong input characteristics, including input power factor of at least 0.99 and input current distortion of 3% or less under published conditions.
In conventional double-conversion operation, efficiency reaches up to 97%. Dynamic Online Mode provides efficiency up to 99%, while ECO Mode operates above 99% efficiency under applicable operating conditions.
The output architecture supports power factor up to unity and a broad range of leading and lagging loads, making the UPS suitable for modern digital infrastructure and other compatible critical loads.
Liebert EXL S1 supports both centralised and distributed parallel configurations. Up to eight UPS units can operate in parallel, allowing system architecture to expand according to capacity and redundancy requirements.
Intelligent Paralleling can place excess units into standby according to load demand, helping maintain higher operating efficiency at partial system load.
Current EXL S1 documentation also supports both conventional VRLA and compatible lithium-ion battery technologies, providing flexibility across different critical-power energy-storage architectures.
Liebert EXL S1 combines advanced power conversion, flexible electrical architecture and intelligent control for high-capacity critical environments.
Full-IGBT three-level power conversion provides a high-density transformer-free architecture for modern critical loads.
The platform provides up to 97% VFI efficiency, up to 99% Dynamic Online efficiency and above 99% ECO Mode efficiency.
Published input performance includes power factor of at least 0.99 and input current distortion of 3% or less.
Up to eight units can operate in centralised or distributed parallel architectures, with intelligent capacity management at partial load.
Liebert EXL S1 supports compatible VRLA and lithium-ion battery systems for different energy-storage requirements.
Applicable EXL S1 configurations can respond to grid-service commands in less than 0.5 seconds through controlled battery charging and discharging.
Conceptual illustration — Vertiv Liebert EXL S1 rectifier, DC power interface, inverter and battery path
Vertiv Liebert EXL S1 combines full-IGBT three-level conversion with advanced digital controls and flexible operating modes for high-capacity critical loads.
Current EXL S1 documentation combines eight published capacity points with multiple operating modes, parallel architectures and battery technologies.
Electrical ratings, cabinet width, weight, maintenance bypass arrangement and other parameters vary across individual EXL S1 capacities.
Key information about current EXL S1 capacity, efficiency, parallel architecture and configuration-dependent specifications.
Vertiv Liebert EXL S1 is a transformer-free, monolithic high-power UPS designed for medium-to-large data centres and other compatible mission-critical applications.
The current Vertiv technical brochure lists 300, 400, 500, 600, 800, 1000, 1200 and 1250 kVA/kW configurations.
Published efficiency reaches up to 97% in Double Conversion Mode, up to 99% in Dynamic Online Mode and above 99% in ECO Mode under applicable operating conditions.
Cabinet width, weight, output capability at elevated ambient temperature, maintenance bypass arrangement, battery configuration, optional protection and other electrical parameters vary according to the selected EXL S1 rating.
Explore conceptual views of the EXL S1 cabinet, intelligent parallel architecture and flexible energy-storage interface.
Conceptual illustration — Vertiv Liebert EXL S1 high-power monolithic UPS cabinet architecture
Conceptual illustration — Vertiv Liebert EXL S1 centralised and distributed parallel architecture
Conceptual illustration — Vertiv Liebert EXL S1 VRLA and lithium-ion battery integration architecture
Contact Intermax for Vertiv Liebert EXL S1 pricing, availability and product information.
15th Floor, G Square Business Park, Plot No.25 and 26, Sector 30, Vashi, Navi Mumbai – 400 703
Have a question? Call us or visit our contact us page for more info.