10kVA Online Double-Conversion UPS Comparison for Three-Phase Critical Loads
The Xtreme Power Li90 and the Eaton 9355 from Eaton are both 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 platforms provide continuous clean power and integrated maintenance bypass, meaningful differences appear in usable power output, battery technology, efficiency and heat dissipation, physical weight, runtime scalability, operating temperature range, and long-term lifecycle cost.
For environments where power density, thermal efficiency, and long-term operating 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
- Full 10kW usable power (unity power factor)
- Lithium iron phosphate (LiFePO₄) battery technology
- Significantly higher efficiency with lower heat output
- Substantially lighter system weight
- Scalable internal runtime options
- Operation up to 50 °C (122 °F)
- Longer battery and system warranty coverage
- Lower installation, maintenance, and lifecycle costs
10kVA 208/120V Three-Phase UPS Feature Comparison
| Feature | Xtreme Power Li90 (10kVA) | Eaton 9355 (10kVA) | Li90 Advantage |
| Rated Capacity | 10kVA / 10kW | 10kVA / 9kW | Full usable power (unity PF) |
| UPS Topology | Online Double Conversion | Online Double Conversion | Equal protection |
| Battery Technology | Lithium Iron Phosphate (LiFePO₄) | VRLA (Lead-Acid) | Much longer life, smaller & lighter |
| Online Efficiency / Heat Output | ~94.5% / ~1,985 BTU/hr | ~91% / ~3,798 BTU/hr | Lower cooling requirements |
| Internal Battery Runtime Options | ~15 min @ 10kW (Li90-10k1) ~30 min @ 10kW (Li90-10k2) ~45 min @ 10kW (Li90-10k3) |
~22 min @ 9kW | More runtime flexibility |
| Battery Life Expectancy | Up to 15 years or 3,000–5,000 cycles | ~3–5 years or ~300 cycles | Dramatically fewer replacements |
| Maintenance Bypass | Integrated (standard) | Integrated (standard) | Equal serviceability |
| Operating Temperature | Up to 50 °C (122 °F) (derating above 40 °C) |
Up to 45 °C (113 °F) (derating above 40 °C) |
Better for hot environments |
| Physical Size / Weight (with base battery) | 12.6 × 35.2 × 49.2 in / ~387 lb | 12 × 33.5 × 47.8 in / ~609 lb | Significantly lighter |
| Battery Warranty | 5 years (LiFePO₄) | 2 years (VRLA) | Longer coverage, lower risk |
| Start-Up & System Warranty | Start-up included; 2-year warranty (US & Canada) | 1-year parts / 90-day labor | Longer standard coverage |
Where the Li90 Excels
- 10kVA three-phase deployments requiring full usable kW
- Sites with limited cooling or high ambient temperatures
- Installations where lower heat output reduces HVAC load
- Facilities aiming to minimize battery replacement events
- Projects seeking lower total cost of ownership
- Environments where lighter equipment simplifies installation
When the Eaton 9355 May Be a Fit
- Traditional data center environments with adequate cooling
- Sites standardized on Eaton 9355 platforms
- Installations comfortable with more frequent VRLA battery replacement
Who Should Choose Which?
Choose Xtreme Power Li90 if you need:
- Full 10kW usable power in a 10kVA system
- Lithium UPS technology with long service life
- Higher efficiency and lower thermal output
- Flexible internal runtime options
- Operation up to 50 °C
- Longer battery and system warranty coverage
Choose Eaton 9355 if you need:
- A traditional VRLA-based online UPS
- Alignment with existing Eaton 9355 deployments
- Standard operating conditions with controlled cooling
Download the Printable Comparison
Download the Xtreme Power Li90 vs Eaton 9355 (10kVA) Comparison PDF
https://xpcc.com/wp-content/uploads/Xtreme-Li90-Eaton-9355-10k-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