P91-6K vs Eaton 9PX6KG2
The Xtreme Power P91-6K (paired with the BPXR2U240A pack) and Eaton 9PX6KG2 are both true online double-conversion UPS for mission-critical infrastructure. The P91-6K delivers full 6 kW at unity PF (vs 5.4 kW), longer baseline runtime, modular bypass/distribution, and TAA; the 9PX6KG2 emphasizes a compact 3U chassis.
What the P91-6K brings
- Full usable output (6 kW vs 5.4 kW)
- Longer baseline runtime (5 min vs 3 min)
- Optional XBDM modular bypass & distribution
- Built-in TAA compliance for federal procurement
- Flexible runtime scaling with BPXR 2U / 3U packs
Side-by-side specifications
| Specification | Xtreme Power P91-6K + BPXR2U240A | Eaton 9PX6KG2 | Advantage |
|---|---|---|---|
| UPS capacity | 6 kVA / 6 kW (unity PF) | 6 kVA / 5.4 kW | P91 – higher usable watts |
| Topology | Online double-conversion | Online double-conversion | Equivalent premium protection |
| System runtime (full load) | 5 min @ 6 kW | 3 min @ 5.4 kW | P91 – longer baseline runtime |
| Optional external battery packs | Yes (BPXR 2U or 3U) | Yes | Both support runtime expansion |
| 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 1U 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 P91-6K vs Eaton 9PX6KG2 comparison; based on publicly available manufacturer data. The P91-6K delivers full 6 kW at unity PF vs the 9PX6KG2’s 5.4 kW. The 9PX6KG2 is more compact (3U) while the P91 trades 1U for runtime and modular bypass/distribution.
Choosing between them
Both are premium online platforms, but the P91-6K delivers full 6 kW (vs 5.4 kW), longer runtime, modular bypass/distribution, and TAA at comparable warranty; the 9PX6KG2 is more compact (3U) and fits Eaton-standardized environments.
Choose the P91-6K + BPXR2U240A if you need
- Full 6 kW usable output from a 6 kVA UPS
- Longer baseline runtime without large external cabinets
- Modular bypass and power distribution (XBDM)
- Federally funded / TAA-restricted procurement
The 9PX6KG2 may fit if you need
- A more compact, integrated 3U 6 kVA chassis
- Alignment with an existing Eaton ecosystem
- Non-TAA commercial deployments with modest runtime needs
Related comparisons
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