20 kVA vs 15 kVA 208/120 V Three-Phase Online UPS Modernization Comparison
Facilities replacing legacy 15 kVA three-phase UPS infrastructure frequently evaluate higher-capacity lithium platforms to improve lifecycle performance and increase operational margin. The Xtreme Power Li90-20k and Vertiv VM-class (Liebert EXS-V 15 kVA) systems both provide online double-conversion protection for critical facility environments.
Vertiv VM-class systems represent compact standalone UPS architectures typically deployed with valve-regulated lead-acid batteries. The Li90 platform is designed as a lithium-integrated modernization solution intended to improve power density, reduce lifecycle maintenance intervention, and support capacity right-sizing during infrastructure upgrades.
Learn more about the Li90 platform
https://xpcc.com/3-phase-lithium-ups-li90/
20 kVA vs 15 kVA Three-Phase UPS Comparison
| Feature | Xtreme Power Li90-20k | Vertiv VM-Class (EXSV-15KTN) | Li90 Modernization Advantage |
| UPS Architecture | Lithium-integrated compact standalone UPS | Compact standalone three-phase UPS | Integrated lithium modernization platform |
| Rated Capacity | 20 kVA / 20 kW | 15 kVA / 15 kW | Additional capacity headroom |
| System Loading at 15 kW Facility Load | 75 % | 100 % | Greater operational margin |
| Topology | Online double conversion | Online double conversion | Equivalent protection architecture |
| Battery Technology | Lithium Iron Phosphate (LiFePO₄) | VRLA (Lead-Acid) | Extended lifecycle performance |
| Battery Design Life | Up to 15 years | Typically 3–5 years | Reduced replacement frequency |
| Internal Runtime (at 15 kW load) | 20 min (2 modules) / 30 min (3 modules) | 18 min | Greater runtime flexibility |
| Runtime Expansion | Modular internal lithium battery architecture | External battery cabinets typically required | Simplified infrastructure planning |
| Online Efficiency | 94.5 % | 93.4 % | Higher operating efficiency |
| Cabinet Width | 12.6 in | 23.6 in | Higher power density |
| Installed Weight | 483 lb | >1200 lb depending on configuration | Reduced installation burden |
| Installation Model | Retrofit modernization and capacity right-sizing | Conventional facility UPS replacement | Simplified upgrade execution |
Modernization Considerations
Replacing legacy VRLA-based UPS infrastructure provides an opportunity to improve long-term system performance, increase usable capacity margin, and reduce lifecycle maintenance intervention. Lithium-integrated UPS platforms support modernization strategies by combining extended battery design life, improved electrical-room space utilization, and simplified infrastructure planning.
Typical Deployment Environments
Li90 modernization deployments
- healthcare imaging and clinical environments
- industrial automation and manufacturing power rooms
- commercial building electrical infrastructure
- mid-size data center modernization projects
- mission-critical facility retrofit programs
Vertiv VM-class deployments
- conventional distributed three-phase UPS installations
- facilities standardized on VRLA battery infrastructure
- continuity-focused capacity replacement projects
- installed-base ecosystem alignment strategies
Lithium vs Lead-Acid Lifecycle Considerations
Understanding lifecycle differences between lithium and lead-acid UPS systems is important when planning infrastructure upgrades.
Learn more
https://xpcc.com/lithium-ups-vs-lead-acid-ups/
Li90 Platform Resources
Li90 Overview
https://xpcc.com/3-phase-lithium-ups-li90/
Li90 20 kVA Model
https://xpcc.com/li90-20kva-lithium-ups/
Industrial Lithium UPS
https://xpcc.com/industrial-lithium-ups/
Data Center UPS
https://xpcc.com/data-center-ups/
UPS Sizing Tool
https://xpcc.com/ups-sizing-tool/
Evaluating a Three-Phase UPS Modernization Project?
Engineers and facility planners replacing aging three-phase UPS infrastructure often evaluate lifecycle cost, runtime strategy, installation constraints, and long-term operational reliability when considering lithium-integrated UPS platforms.
The Xtreme Power engineering team can assist with:
- lithium retrofit feasibility assessment
- runtime and load growth modeling
- electrical room space planning
- lifecycle cost comparison analysis
- specification and procurement support
Need Help Selecting a Lithium UPS?
Engineers evaluating compact UPS systems often compare lifecycle performance, footprint, and long-term maintenance requirements.
The Xtreme Power team can help evaluate your deployment and recommend the appropriate UPS platform.
Consultants and engineers often require printable comparison documentation for internal review, budgeting, or specification development. Download the full comparison PDF
Phone: 800-582-4524
Email: sales@xpcc.com