P91-5K vs Vertiv Liebert GXT5-5000HVRT5UXLN
The Xtreme Power P91-5K (paired with the BPXR2U240A pack) and Vertiv Liebert GXT5-5000HVRT5UXLN are both true online double-conversion UPS delivering full 5 kVA / 5 kW at unity PF with comparable baseline runtime. The P91-5K differentiates on multi-voltage output, modular bypass/distribution, lower rack height, and TAA; the Vertiv HVRT prioritizes long internal runtime in a larger single chassis.
What the P91-5K brings
- Multi-voltage output flexibility (208–240 V vs 208 V nominal)
- Lower total rack height (4U vs 5U)
- Optional XBDM modular bypass & distribution
- Built-in TAA compliance for federal procurement
- Scalable runtime with BPXR battery modules
Side-by-side specifications
| Specification | Xtreme Power P91-5K + BPXR2U240A | Vertiv Liebert GXT5-5000HVRT5UXLN | Advantage |
|---|---|---|---|
| UPS capacity | 5 kVA / 5 kW | 5 kVA / 5 kW | Equivalent usable power |
| Topology | Online double-conversion | Online double-conversion | Equivalent premium protection |
| Output voltage | 208/220/230/240 VAC | 208 VAC nominal | P91 – greater voltage flexibility |
| System runtime (full load) | 7 min @ 5 kW | 7 min @ 5 kW | Comparable baseline runtime |
| Optional external battery cabinets | Yes (BPXR series) | Yes (Vertiv EBCs) | Both support runtime scaling |
| Input / output architecture | Hardwired or optional XBDM modular bypass & distribution | Hardwired input; fixed receptacles | P91 – greater serviceability & flexibility |
| Rack height | 4U total (2U UPS + 2U battery) | 5U UPS (8.5 in) | P91 – saves rack space |
| Battery technology | VRLA | VRLA | Comparable chemistry |
| Warranty | 3-yr electronics / 3-yr battery | 3-yr electronics / 3-yr battery | Aligned coverage |
| Compliance / listings | UL1778, cUL, FCC, CE, RoHS, TAA | UL1778, c-UL, CSA, FCC Class A | P91 – adds TAA |
| TAA compliance | Yes | No | P91 – federal differentiator |
Specifications from Xtreme Power’s supplied P91-5K vs Vertiv GXT5-5000HVRT5UXLN comparison; based on publicly available manufacturer data. The Vertiv HVRT is a long-internal-runtime single chassis (5U); the P91-5K matches its baseline runtime in a lower 4U total height with a BPXR2U240A pack.
Choosing between them
Both deliver full 5 kW at unity PF with comparable 7-minute baseline runtime. The P91-5K leads on voltage flexibility, rack height (4U vs 5U), modular bypass/distribution, and TAA at aligned warranty; the Vertiv HVRT suits Vertiv-standardized sites favoring long internal runtime in a single chassis.
Choose the P91-5K + BPXR2U240A if you need
- Federally funded / TAA-restricted procurement
- Lower total rack height for dense infrastructure racks
- Multi-voltage output flexibility (208–240 V)
- Modular bypass and power distribution (XBDM)
The Liebert GXT5-5000HVRT5UXLN may fit if you need
- A single integrated UPS chassis with long internal runtime
- Alignment with an existing Vertiv ecosystem
- Sites where rack height is less constrained
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