Online LiFePO₄ UPS vs Line-Interactive Lithium for Edge, IT, and Network Deployments
The Xtreme Power P91-1kLi and the Schneider APC SMTL1000RM2UCNC from Schneider Electric are both 1kVA lithium-based UPS systems designed for IT, network, and edge deployments.
While both target compact rackmount installations, they are built on very different power-protection platforms. The P91-1kLi is a true online double-conversion UPS using Lithium Iron Phosphate (LiFePO₄) batteries for zero-transfer-time protection and high-temperature resilience. The APC SMTL1000RM2UCNC is a line-interactive lithium-ion UPS designed for lighter-duty protection with integrated network management.
Key differences appear in topology, usable watt output, battery lifecycle, temperature rating, mounting flexibility, compliance, and warranty coverage. For modern distributed and regulated environments where long service life and conditioning quality matter, the P91-1kLi delivers clear next-generation advantages.
Learn more about the Xtreme Power P91 Series
https://xpcc.com/products/p91/
Key Differentiators at a Glance
- Online double-conversion topology with zero transfer time
- LiFePO₄ battery chemistry for longer cycle life and improved thermal stability
- Up to 15-year battery life design target
- Higher usable real power (900W vs 800W)
- Operation up to 50 °C (122 °F) with derating above 40 °C
- Shallower depth and broader mounting flexibility (rack / tower / wall)
- Optional modular Web/SNMP (SNMP-2PV3) vs integrated management
- TAA compliant for U.S. government and regulated procurement
- 6-year standard warranty covering UPS and battery
1kVA UPS Feature Comparison
| Feature | Xtreme Power P91-1kLi | APC SMTL1000RM2UCNC | P91-1kLi Advantage |
| Availability | June 2026 | Current production | Next-generation platform with extended lifecycle design |
| Battery Chemistry | LiFePO₄ (Lithium Iron Phosphate) | Lithium-ion | Longer cycle life and improved thermal stability |
| Battery Life Expectancy | Up to 15 years / 3,000–5,000 cycles | 8–10 years typical | Significantly longer expected service life |
| UPS Topology | Online double conversion | Line-interactive | Zero transfer time and superior power conditioning |
| Capacity (VA / W) | 1000 VA / 900 W | 1000 VA / 800 W | Higher usable real-power output |
| High-Temperature Operation | Up to 50 °C (122 °F), derates above 40 °C | Rated to 40 °C (104 °F) | Better suited for edge and light-industrial environments |
| Runtime @ Full Load | 6:36 @ 900 W | 7:47 @ 800 W | P91 supports higher real load |
| Rack Height / Depth | 2U / 11.6 in | 2U / 12.5 in | Shallower depth simplifies installs |
| Form Factor / Mounting | Rack / tower / wall | Rack / tower | Greater installation flexibility |
| Network / Management | Optional Web/SNMP (SNMP-2PV3) | Integrated network management | Modular flexibility based on site needs |
| TAA Compliance | Yes | No | Eligible for U.S. federal procurement |
| Warranty | 6-year UPS & battery | 5-year UPS & battery | Industry-leading standard coverage |
Where the P91-1kLi Excels
- Edge IT and network closets with limited cooling
- Applications requiring zero transfer time and clean conditioned output
- Sites needing higher usable watt capacity in a compact UPS
- Deployments where battery replacement is disruptive or costly
- Government, public sector, and regulated procurement requiring TAA compliance
- Distributed locations needing optional Web/SNMP monitoring
When the APC SMTL1000RM2UCNC May Be a Fit
- General IT environments tolerant of line-interactive transfer time
- Deployments that prefer integrated network management out of the box
- Applications where 800W usable capacity is sufficient
Who Should Choose Which?
Choose Xtreme Power P91-1kLi if you need:
- Online double-conversion UPS protection with zero transfer time
- LiFePO₄ batteries with extended service life and better thermal stability
- Operation up to 50 °C (122 °F) for edge and industrial spaces
- Higher usable real power (900W)
- TAA compliance and a 6-year standard warranty
Choose APC SMTL1000RM2UCNC if you need:
- A lithium line-interactive UPS with integrated management
- Alignment with existing APC lithium Smart-UPS deployments
- A lighter-duty 1kVA solution where 800W is sufficient
Download the Printable Comparison
Download the Xtreme Power P91-1kLi vs APC SMTL1000RM2UCNC Comparison PDF
https://xpcc.com/wp-content/uploads/P91-1kLi-Schneider-APC-SMTL1000RM2UCNC-Comparison.pdf
(Ideal for procurement reviews, specification packages, and internal approvals)
Compare P91 to Other UPS Alternatives
Evaluating multiple UPS platforms or standardizing across sites?
View all P91 UPS comparisons
https://xpcc.com/p91-ups-comparisons/
Plan with Confidence
Xtreme Power Conversion supports early specification, design-in, and lifecycle planning for edge IT, networking, industrial, and regulated environments.
(800) 582-4524
sales@xpcc.com