20kVA Online Double-Conversion UPS Comparison for Three-Phase Critical Loads
The Xtreme Power Li90 and the Vertiv Liebert EXSV-20KTN from Vertiv are high-performance, online double-conversion UPS systems designed to protect mission-critical three-phase loads in data centers, industrial facilities, healthcare environments, and infrastructure applications.
While both systems deliver full-rated output in the 20kVA class and support ECO-mode operation, the Li90 differentiates itself through higher efficiency, dramatically longer lithium battery life, significantly longer runtime in a much smaller footprint, higher operating temperature tolerance, and longer warranty coverage.
For environments where space, heat, runtime, and long-term lifecycle cost matter, the Li90 delivers clear next-generation advantages.
Learn more about the Xtreme Power Li90
https://xpcc.com/products/li90/
Key Differentiators at a Glance
- Lithium iron phosphate (LiFePO₄) battery technology
- Higher online efficiency with lower heat dissipation
- Significantly longer internal runtime options
- Much smaller and lighter footprint
- Operation up to 50 °C (122 °F)
- Substantially longer battery and system warranty coverage
- Lower installation, maintenance, and total lifecycle costs
20kVA 208/120V Three-Phase UPS Feature Comparison
| Feature | Xtreme Power Li90 (20kVA) | Vertiv Liebert EXSV-20KTN | Li90 Advantage |
| Rated Capacity | 20kVA / 20kW | 20kVA / 20kW | Equal full-rated (unity PF) output |
| UPS Topology | Online Double Conversion + ECO Mode | Online Double Conversion + ECO Mode | Equivalent premium protection |
| Online Efficiency / Heat Output | ~94.5% / ~3,970 BTU/hr | ~93.4% / ~4,820 BTU/hr | Lower heat and cooling demand |
| Battery Technology | Lithium Iron Phosphate (LiFePO₄) | VRLA (Lead-Acid) | Far longer life, smaller & lighter |
| Internal Battery Runtime | ~15 min @ 20kW (2 strings) ~30 min @ 20kW (3 strings) |
~13 min @ 20kW | Much longer runtime in smaller footprint |
| Battery Life Expectancy | Up to 15 years or 3,000–5,000 cycles | ~6–8 years or ~300 cycles | Dramatically fewer replacements |
| Maintenance Bypass | Integrated (standard) | Integrated (standard) | Equal serviceability |
| Operating Temperature | Up to 50 °C (122 °F) | Up to 40 °C (104 °F) | Better for hot electrical rooms |
| Physical Size / Weight (with base battery) | 12.6 × 35.2 × 49.2 in / ~387 lb | 23.6 × 39.3 × 78.7 in / ~1,212 lb | Far smaller and lighter |
| Battery Warranty | 5 years (LiFePO₄) | 1 year (VRLA) | 5× longer coverage |
| Start-Up & System Warranty | Start-up included; 2-year warranty (US & Canada) | 1-year warranty | Longer standard coverage |
Where the Li90 Excels
- 20kVA three-phase deployments with space or weight constraints
- Electrical rooms with elevated ambient temperatures
- Sites requiring longer runtime without external battery cabinets
- Facilities aiming to reduce battery replacement and maintenance events
- Edge, industrial, and infrastructure environments
- Long-term projects focused on minimizing total cost of ownership
When the Vertiv Liebert EXSV-20KTN May Be a Fit
- Traditional data center environments with ample floor space
- Installations standardized on Vertiv EXS / EXSV platforms
- Projects comfortable with shorter VRLA battery service intervals
Who Should Choose Which?
Choose Xtreme Power Li90 if you need:
- Lithium UPS technology with long service life
- Higher efficiency and lower thermal output
- Much longer runtime in a compact footprint
- Operation up to 50 °C without derating
- Lower weight and easier installation
- Longer battery and system warranty coverage
Choose Vertiv Liebert EXSV-20KTN if you need:
- A traditional VRLA-based three-phase UPS
- Alignment with existing Vertiv infrastructure
- Standard operating conditions with controlled cooling
Download the Printable Comparison
Download the Xtreme Power Li90 vs Vertiv Liebert EXSV-20KTN Comparison PDF
https://xpcc.com/wp-content/uploads/Xtreme-Li90-Vertiv-EXSV-20KTN-Comparison.pdf
(Ideal for specification reviews, project planning, and internal approvals)
Compare Li90 to Other UPS Alternatives
Evaluating lithium and VRLA UPS platforms for critical infrastructure?
View all Xtreme Power UPS comparisons
https://xpcc.com/ups-comparisons/
Plan with Confidence
Xtreme Power Conversion supports early specification, design-in, and lifecycle planning for data centers, industrial facilities, healthcare, and regulated environments.
(800) 582-4524
sales@xpcc.com