M90U-140 vs Vertiv Liebert APM2 208V
The Xtreme Power M90U-140 and the Vertiv Liebert APM2 208V are modular online double-conversion UPS for 208V three-phase environments. The M90U-140 emphasizes higher usable N+1 headroom, segmented service-friendly battery architecture, and a standard internal maintenance bypass; the APM2 offers higher maximum expansion and multiple battery chemistry options. For facilities prioritizing high density, simplified maintenance, and standardized integration, the M90U-140 is a compact, service-optimized choice.
An M90U-140 with its M90-BC battery enclosure deployed in a live electrical room, alongside a row of distribution cabinets.
What the M90U-140 brings
- Higher usable N+1 capacity (140 kW vs 120 kW).
- Finer scaling below 30 kW (from 15 kW).
- Segmented M90-BC battery cabinet with individually breakered strings, to 140 kVA.
- Internal maintenance bypass included as standard.
- Equal 23.6-in cabinet footprint with high power density.
- Longer standard warranty coverage.
Feature comparison
| Specification | Xtreme Power M90U-140 | Vertiv Liebert APM2 208V | Advantage |
|---|---|---|---|
| Rated capacity | Up to 140 kW N+1 | Up to 150 kW | APM2 maximum is higher (150 kW) |
| Available power sizes | 15–140 kW | 30–150 kW | Finer scaling below 30 kW |
| N+1 redundancy | Up to 140 kW | Up to 120 kW | Greater N+1 headroom |
| Modular architecture | Power, battery & static-switch modules | Power modules | Modular static switch |
| Battery chemistry | VRLA | VRLA or lithium-ion | APM2 adds a lithium-ion option |
| Modular VRLA battery cabinet | M90-BC, 8 breakered strings, up to 140 kVA | Modular VRLA cabinet up to 120 kVA | More segmentation; higher VRLA capacity |
| Maintenance bypass | Internal, standard | Internal, optional | Standard, no added option |
| Online efficiency | Up to 94% (98% ECO) | Up to 95.7% | APM2 rates higher online (95.7%) |
| UPS cabinet width | 23.6 in | 23.6 in | Equal footprint |
| Warranty | 2-year parts standard | 1-year parts | Longer standard warranty |
Both are modular online double-conversion UPS in a 23.6-in cabinet. The M90U-140 leads on usable N+1 (140 vs 120 kW), finer sizing below 30 kW, a modular static switch, M90-BC battery segmentation (8 breakered strings to 140 kVA vs 120 kVA), a standard internal bypass, and a longer warranty. The APM2 offers a higher maximum capacity (150 kW), a lithium-ion battery option, and a higher online efficiency rating (95.7% vs up to 94%). Confirm Liebert APM2 specifications against current Vertiv documentation.
Choosing between them
Choose the M90U-140 for higher usable N+1 (140 kW), finer low-end sizing, segmented breakered VRLA battery architecture, and a standard internal bypass; the Liebert APM2 fits facilities needing capacity beyond 140 kW, lithium-ion battery options, or standardization on Vertiv.
Choose the M90U-140 if you need
- Usable N+1 to 140 kW in a 23.6-in cabinet
- Finer scaling below 30 kW
- Segmented M90-BC battery architecture with breakered strings
- Internal maintenance bypass as standard
- Longer standard warranty coverage
The Liebert APM2 208V may fit if you need
- Maximum capacity beyond 140 kW (up to 150 kW)
- Lithium-ion battery options
- A higher online efficiency rating
- Alignment with existing Liebert APM2 deployments
Related comparisons
Plan your enterprise modular UPS deployment
Talk to an Xtreme Power specialist about sizing the right M90U-140 configuration and runtime architecture, planning N+1 redundancy to 140 kW and phased capacity expansion, and comparing modular three-phase platforms for data center, healthcare, industrial, and critical-infrastructure environments.