Ai90 vs Vertiv Liebert APM2
The Ai90 is a high-density modular rack-integrated UPS; the Vertiv Liebert APM2 is a modular UPS in a floor-standing cabinet. In the 40–80 kW range both support internal VRLA batteries for short-duration runtime. The APM2 spans a very wide capacity band and posts the highest peak online efficiency of the floor-standing platforms here; the Ai90 differs most in deployment model — rack-level integration versus a floor-standing cabinet.
Where the Ai90 leads
- Rack-level deployment — a 13U fully integrated system that installs in a standard rack rather than a floor-standing cabinet.
- Over 5 kW per U power density within a 13U footprint.
- UPS, internal modular battery, maintenance bypass, and output distribution integrated into one system.
- Dual battery strings with a common breaker; short-duration ride-through optimized for generator transfer, scalable via 4U Ai90-EBC4 cabinets.
- Unified UL and CE coverage across 480V and 400V configurations.
Ai90 and Liebert APM2, side by side
| Specification | Xtreme Power Ai90 | Vertiv Liebert APM2 | Advantage |
|---|---|---|---|
| Platform range | 50–70 kW | 10–120 kW platform | APM2 spans a wider range |
| UPS architecture | Modular rack-integrated | Modular floor-standing | Rack-level vs floor-standing |
| Form factor | 13U rack-mounted | Floor-standing modular cabinet | Fits a standard rack |
| Dimensions | 17.2 × 36.2 × 22.75 in (13U) | 23.6 × 40.6 × 78.7 in | ~80% smaller volume |
| Power density | >5 kW per U | Not rack-density comparable | Highest-density deployment |
| Efficiency (online) | 96.5% | Up to 97.5% | Comparable; APM2 up to 97.5% |
| Voltage coverage | UL + CE across all configs | UL or CE per configuration | Unified UL + CE platform |
| Battery integration | Internal modular | Internal modular VRLA | Equivalent concept |
| Runtime strategy | Short-duration internal or external | Short-duration internal or external | Equivalent strategy |
| Distribution | Integrated rack-level | External distribution required | Reduces external infrastructure |
| Maintenance bypass | Integrated | Integrated | Equivalent functionality |
| Installation | Rack deployment | Floor-standing installation | Faster deployment |
Both are modular UPS platforms with integrated bypass and internal-VRLA short-duration runtime. The Ai90 leads on deployment model, footprint, and density — about 80% smaller volume in a standard rack. The APM2 spans a wider 10–120 kW range and posts the highest peak online efficiency here (up to 97.5% vs 96.5%). Confirm APM2 specifications against current Vertiv documentation.
Choosing between them
Choose the Ai90 for rack-level deployment, high density, and integrated distribution within a standard rack. The APM2 fits where a floor-standing standard governs the facility, where single-platform capacity well beyond the Ai90 range (to 120 kW) is required, or where the Vertiv service ecosystem is required.
Choose the Ai90 if you need
- Rack-level deployment inside a standard rack
- Over 5 kW per U high density
- An integrated UPS, battery, bypass & distribution system
- Reduced external infrastructure and cabling
- Faster install than floor-standing systems
- Unified UL + CE across configurations
The Liebert APM2 may fit if you need
- A floor-standing UPS standard already governs the facility
- Single-platform capacity to 120 kW is required
- The Vertiv service ecosystem is required
Related comparisons
Plan your rack-integrated UPS deployment
Talk to an Xtreme Power specialist about rack-integrated UPS design, high-density deployment, runtime sizing with Ai90-EBC4 external battery cabinets, migration from floor-standing or legacy systems, and TAA-compliant procurement for AI/GPU compute, data center, edge, and industrial environments.