The Xtreme Power Conversion P91-6K (paired with the BPXR2U240A battery pack) and the Eaton 9PX6KG2 are true online, double-conversion UPS systems designed for mission-critical IT and infrastructure loads. Both occupy a similar performance tier and deliver enterprise-grade power protection.
However, the P91-6K configuration prioritizes higher usable watt output, longer baseline runtime, modular bypass and distribution flexibility, and built-in TAA compliance, while the Eaton 9PX6KG2 emphasizes a compact, integrated UPS chassis with lower usable output.
6 kVA / 208–240 V Online UPS Comparison
| Feature | XTREME POWER P91-6K + BPXR2U240A | Eaton 9PX6KG2 | XPCC Advantage |
| UPS Capacity | 6 kVA / 6 kW (unity PF) | 6 kVA / 5.4 kW | Higher usable watt output |
| Topology | Online Double Conversion | Online Double Conversion | Equivalent premium protection |
| System Runtime (Full Load) | ~5 minutes @ 6 kW | ~3 minutes @ 5.4 kW | 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 | Greater flexibility and serviceability |
| Rack Height / Configuration | 4U total (2U UPS + 2U battery) | 3U total | Trades 1U for runtime |
| Form Factor | Rack / Tower | Rack / Tower | Equivalent mounting flexibility |
| Warranty | 3 years electronics 3 years batteries |
3-year limited warranty | Comparable coverage |
| Compliance / Listings | UL1778, cUL, FCC, CE, RoHS, TAA | UL1778, cULus, IEC 62040-2, RoHS | P91 adds TAA compliance |
| TAA Compliance | Yes | No | Key differentiator for federal procurement |
Printable Comparison PDF
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Where the P91-6K Excels
- Federally funded and TAA-restricted procurement environments
- Deployments requiring full 6 kW usable output from a 6 kVA UPS
- Installations needing longer baseline runtime without large external cabinets
- Projects benefiting from modular bypass and power distribution (XBDM)
- Infrastructure racks prioritizing serviceability and lifecycle flexibility
When Eaton 9PX6KG2 May Be a Fit
- Existing Eaton-standardized UPS environments
- Deployments prioritizing a compact, integrated UPS design
- Installations where lower usable watt capacity is acceptable
- Non-TAA-regulated commercial projects
Who Should Choose Which
Choose Xtreme Power Conversion P91-6K if you need:
- Full usable output (6 kW vs 5.4 kW)
- Longer baseline runtime at full load
- Modular bypass and distribution for easier service and expansion
- Built-in TAA compliance for government, education, and public-sector projects
- Flexible runtime scaling using BPXR battery options
Choose Eaton 9PX6KG2 if you need:
- A more compact 6 kVA UPS chassis
- Alignment with an existing Eaton ecosystem
- Deployment in non-regulated environments with modest runtime needs
Ideal Applications
- Data-center edge and infrastructure racks
- Network and telecom rooms
- Government, education, and public-sector facilities
- Enterprise IT environments
- Projects requiring scalable runtime and service flexibility
Plan with Confidence
Request a Quote
Speak with an Xtreme Power Conversion specialist to size the right P91-6K configuration and runtime architecture for your application.
Xtreme Power Conversion
Phone: (800) 582-4524
Email: sales@xpcc.com