The Xtreme Power Conversion P91-5K (paired with the BPXR2U240A battery pack) and the Vertiv Liebert GXT5-5KL630RT3UXLN are true online, double-conversion UPS systems designed for mission-critical IT and infrastructure loads. Both deliver enterprise-grade power protection using VRLA battery technology.
However, the P91-5K configuration prioritizes longer baseline runtime, higher usable watt capacity, compact rack utilization through modular battery architecture, modular bypass and distribution, and built-in TAA compliance, while the Vertiv GXT5 emphasizes integrated internal batteries within a larger UPS-only chassis.
5 kVA / 208–240 V Online UPS Comparison
| Feature | XTREME POWER P91-5K + BPXR2U240A | Vertiv Liebert GXT5-5KL630RT3UXLN | XPCC Advantage |
| UPS Capacity | 5 kVA / 5 kW | 4.9 kVA / 4.6 kW | Higher usable watt capacity |
| Topology | Online Double Conversion | Online Double Conversion | Equivalent premium protection |
| Output Voltage | 208 / 220 / 230 / 240 VAC | 208 / 220 / 230 / 240 VAC | Aligned voltage support |
| System Runtime (Full Load) | ~7 minutes @ 5 kW | ~4.8 minutes @ 4.6 kW | Longer 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 | L6-30P input; fixed receptacle set | Greater flexibility and serviceability |
| Rack Height / Configuration | 4U total (2U UPS + 2U battery) | 3U UPS | Trades 1U for longer runtime |
| Battery Technology | VRLA | VRLA | Comparable chemistry |
| Warranty | 3 years electronics 3 years batteries |
3 years electronics 3 years batteries |
Aligned coverage |
| Compliance / Listings | UL1778, cUL, FCC, CE, RoHS, TAA | UL1778, c-UL, CSA, FCC Class A | P91 adds TAA compliance |
| TAA Compliance | Yes | No | Key differentiator for federal procurement |
Printable Comparison PDF
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https://xpcc.com/wp-content/uploads/Xtreme-P91-5K-Vertiv-LiebertGXT5-5000HVRT5UXLN-Comparison.pdf
Where the P91-5K Excels
- Federally funded and TAA-restricted procurement environments
- Deployments requiring higher usable watt output from a 5 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 Vertiv Liebert GXT5-5KL630RT3UXLN May Be a Fit
- Existing Vertiv-standardized IT environments
- Deployments prioritizing a single integrated UPS chassis
- Installations where shorter internal runtime is acceptable
- Non-TAA-regulated commercial projects
Who Should Choose Which
Choose Xtreme Power Conversion P91-5K if you need:
- Higher usable watt capacity (5 kW vs 4.6 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 Vertiv Liebert GXT5-5KL630RT3UXLN if you need:
- A more compact UPS-only footprint
- Alignment with an existing Vertiv ecosystem
- Deployment in non-regulated environments with modest runtime requirements
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 P91-5K configuration and runtime architecture for your application.
Xtreme Power Conversion
Phone: (800) 582-4524
Email: sales@xpcc.com