Online Double-Conversion Lithium UPS Comparison for Critical Infrastructure
The Xtreme Power Li90 and the APC Smart-UPS Modular Ultra Online from APC are both advanced online double-conversion UPS systems designed to protect critical loads with high efficiency and reliability. Both platforms support lithium battery technology, ECO-mode operation, and hot-swappable components.
However, the two systems differ significantly in capacity range, phase and voltage support, overload capability, operating temperature tolerance, and deployment flexibility. These differences make each platform better suited to distinct application profiles.
For environments requiring higher power density, broader electrical compatibility, and operation in challenging thermal conditions, the Li90 delivers clear advantages.
Learn more about the Xtreme Power Li90
https://xpcc.com/products/li90/
Key Differentiators at a Glance
- Broader power range up to 30kVA
- Three-phase 208/120V support for higher-density installations
- Longer overload capability for demanding loads
- Lithium iron phosphate (LiFePO₄) battery chemistry with higher thermal stability
- Integrated maintenance bypass as standard
- Operation up to 50 °C (122 °F)
Online Modular UPS Feature Comparison
| Feature | Xtreme Power Li90 | APC Smart-UPS Modular Ultra Online | Li90 Advantage |
| UPS Topology | Online Double Conversion | Online Double Conversion | Equal protection |
| Available Capacities | 10kVA / 10kW 20kVA / 20kW 30kVA / 30kW |
5kVA / 5kW 10kVA / 10kW 15kVA / 15kW 20kVA / 20kW |
Higher maximum capacity |
| Overload Capability | 150% for 60 seconds | 150% for 30 seconds | Longer overload support |
| Voltage / Phase Options | 208/120V three-phase or single-phase | 208/120V or 240/120V single-phase only | Supports three-phase loads |
| Battery Chemistry | Lithium Iron Phosphate (LiFePO₄) with integrated BMS | Lithium-ion (unspecified chemistry) | Higher safety and thermal stability |
| Battery Replacement | Hot-swappable lithium modules | Hot-swappable lithium modules | Equal serviceability |
| Maintenance Bypass | Integrated as standard | Optional | Lower installation cost and complexity |
| Operating Temperature | Up to 50 °C (122 °F) | Up to 40 °C (104 °F) | Better for edge and industrial sites |
| Battery Warranty | 5 years (LiFePO₄) | 5 years (Lithium-ion) | Comparable coverage |
Where the Li90 Excels
- Installations requiring three-phase power architectures
- Higher-density applications up to 30kVA
- Edge, industrial, or poorly cooled environments
- Sites needing longer overload ride-through
- Deployments seeking simpler service with built-in maintenance bypass
- Long-term installations focused on lower lifecycle risk
When the APC Smart-UPS Modular Ultra May Be a Fit
- Single-phase deployments requiring fine capacity granularity
- Sites standardized on APC modular architectures
- Environments prioritizing integrated N+1 redundancy at lower kVA levels
Who Should Choose Which?
Choose Xtreme Power Li90 if you need:
- Online lithium UPS protection up to 30kVA
- Three-phase 208/120V support
- Operation in high-temperature environments
- Longer overload capability for demanding loads
- Integrated maintenance bypass without external switchgear
Choose APC Smart-UPS Modular Ultra if you need:
- Single-phase modular UPS architectures
- Smaller incremental capacity sizing
- Alignment with existing APC modular deployments
Download the Printable Comparison
Download the Xtreme Power Li90 vs APC Smart-UPS Modular Ultra Comparison PDF
https://xpcc.com/wp-content/uploads/Xtreme-Li90-Modular-Ultra-Online-UPS-Comparison-1.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/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