P91-5K vs Eaton 9PX5KG2
The Xtreme Power P91-5K (paired with the BPXR2U240A pack) and Eaton 9PX5KG2 are both true online double-conversion UPS delivering full 5 kVA / 5 kW at unity PF. The P91-5K differentiates on longer baseline runtime, modular bypass/distribution, and TAA; the 9PX5KG2 emphasizes a compact 3U integrated chassis.
What the P91-5K brings
- Longer baseline runtime (7 min vs 3 min)
- Optional XBDM modular bypass & distribution
- Built-in TAA compliance for federal procurement
- Flexible runtime scaling with BPXR 2U / 3U packs
- Greater architectural flexibility for infrastructure racks
Side-by-side specifications
| Specification | Xtreme Power P91-5K + BPXR2U240A | Eaton 9PX5KG2 | Advantage |
|---|---|---|---|
| UPS capacity | 5 kVA / 5 kW | 5 kVA / 5 kW | Equivalent usable power |
| Topology | Online double-conversion | Online double-conversion | Equivalent premium protection |
| System runtime (full load) | 7 min (with BPXR2U240A) | 3 min | P91 – longer baseline runtime |
| Optional external battery packs | Yes (BPXR 2U or 3U) | Yes | Both scale runtime |
| Input / output architecture | Hardwired or optional XBDM modular bypass & distribution | Hardwired or L6-30P; fixed receptacle set | P91 – greater flexibility & serviceability |
| Rack height | 4U total (2U UPS + 2U battery) | 3U total | 9PX more compact; P91 trades space for runtime |
| Form factor | Rack / tower | Rack / tower | Equivalent mounting flexibility |
| Warranty | 3-yr electronics / 3-yr battery | 3-year limited | Comparable coverage |
| Compliance / listings | UL1778, cUL, FCC, CE, RoHS, TAA | UL1778, cULus, IEC 62040-2, RoHS | P91 – adds TAA |
| TAA compliance | Yes | No | P91 – federal procurement |
Specifications from Xtreme Power’s supplied P91-5K vs Eaton 9PX5KG2 comparison; based on publicly available manufacturer data. The P91-5K configuration shown includes a BPXR2U240A pack. The 9PX5KG2 is more compact (3U) while the P91 trades height for runtime and modular bypass/distribution.
Choosing between them
Both deliver full 5 kW online protection at unity PF. The P91-5K leads on baseline runtime, modular bypass/distribution (XBDM), and TAA at comparable warranty; the 9PX5KG2 is more compact (3U) and fits Eaton-standardized environments.
Choose the P91-5K + BPXR2U240A if you need
- Federally funded / TAA-restricted procurement
- Longer baseline runtime without large external cabinets
- Modular bypass and power distribution (XBDM)
- Infrastructure racks prioritizing serviceability and lifecycle flexibility
The 9PX5KG2 may fit if you need
- A more compact, integrated 3U 5 kVA chassis
- Alignment with an existing Eaton UPS ecosystem
- Non-TAA commercial deployments with modest runtime needs
Related comparisons
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