The Xtreme Power Conversion TX91-6kVA and the NXT Power Integrity Max NPTU6000 are true online, double-conversion UPS systems with integrated isolation transformers, designed for electrically noisy, mission-critical industrial, laboratory, and infrastructure environments. Both provide galvanic isolation and strong surge immunity.
However, the TX91-6kVA differentiates itself with full 6kVA / 6kW (unity power factor) output, longer internal runtime, an XR extended-runtime option, a narrower and shallower footprint, and built-in TAA compliance, making it better suited for regulated and federal deployments.
6kVA Isolation UPS Comparison
| Feature | XTREME POWER TX91-6kVA | NXT Integrity Max NPTU6000 | XPCC Advantage |
| UPS Capacity | 6kVA / 6kW (unity PF) | 6kVA / 5.4kW | TX91 delivers full usable kW |
| Topology | Online Double Conversion with Isolation Transformer |
Online Double Conversion with Isolation Transformer |
Both provide galvanic isolation |
| ANSI/IEEE C62.41 Performance | Yes | Yes | Equivalent surge immunity |
| Output Voltage Options | 120 / 208 / 220 / 230 / 240 VAC | 120 / 208 / 220 / 230 / 240 VAC | Aligned multi-voltage support |
| Internal Runtime (Full Load) | ~8 minutes (up to ~12 min XR) | ~5 minutes | Longer baseline runtime with XR option |
| Optional External Battery Packs | Yes | Yes | Equivalent scalability |
| Input / Output Architecture | Hardwired standard; plugs/receptacles optional | Hardwired standard; plugs/receptacles optional | Comparable configuration approach |
| Dimensions (W × H × D) | ~9.9″ × 32.4″ × 23.3″ | ~11.8″ × 28.4″ × 29.1″ | TX91 is narrower and shallower |
| Warranty | 3 years electronics 3 years batteries |
3 years electronics 3 years batteries |
Equivalent coverage |
| Compliance / Listings | UL1778, cUL, FCC Class A, RoHS, TAA | UL1778, cUL, IEC 62040-1/-2, RoHS, OSHPD/HCAi | TX91 adds TAA compliance |
| TAA Compliance | Yes | No (standard SKU) | TX91 preferred for federal procurement |
Where the TX91-6kVA Excels
- Federally funded and TAA-restricted procurement environments
- Industrial and laboratory applications requiring galvanic isolation
- Installations needing full 6kW usable output from a 6kVA UPS
- Projects prioritizing longer internal runtime without external batteries
- Space-constrained installations benefiting from a narrower, shallower footprint
When NXT Integrity Max NPTU6000 May Be a Fit
- Existing NXT Integrity Max standardized deployments
- Facilities requiring OSHPD/HCAi-listed equipment
- Projects where TAA compliance is not required
- Traditional hardwired isolation UPS applications
Who Should Choose Which
Choose Xtreme Power Conversion TX91-6kVA if you need:
- Full 6kVA / 6kW (unity PF) output
- Built-in TAA compliance for government, education, and public-sector projects
- Longer internal runtime with an XR extended-runtime option
- A narrower, shallower isolation UPS for space-limited environments
- Simplified procurement for regulated deployments
Choose NXT Integrity Max NPTU6000 if you need:
- Alignment with an existing NXT power-quality standard
- Compliance with OSHPD/HCAi-specific facility requirements
- Deployment in non-TAA-regulated projects
Ideal Applications
- Industrial control systems
- Laboratory and test environments
- Manufacturing and process automation
- Federal, education, and public-sector facilities
- Sensitive loads requiring galvanic isolation
Download the Printable Comparison
Download the Xtreme TX91-6kVA – NXT Integrity Max NPTU6000 Comparison PDF
https://xpcc.com/wp-content/uploads/Xtreme-TX91-6kVA-NXT-Integrity-Max-NPTU6000-Comparison.pdf
(Ideal for specification reviews, project planning, and internal approvals)
Plan with Confidence
Request a Quote
Speak with an Xtreme Power Conversion specialist to size the right TX91 isolation UPS and runtime configuration for your application.
Xtreme Power Conversion
Phone: (800) 582-4524
Email: sales@xpcc.com