P91-2kLi vs Schneider APC SMTL2K2RM2UCLNC
The Xtreme Power P91-2kLi and Schneider APC SMTL2K2RM2UCLNC are both 2 kVA LiFePO₄ UPS for IT and network protection, but on different architectures. The P91-2kLi is online double conversion with zero transfer time and continuously conditioned output; the SMTL2K2RM2UCLNC is line interactive. That difference drives the gaps below in runtime, temperature tolerance, recharge, rack depth, and lifecycle.
What the P91-2kLi brings
- Online double conversion with zero transfer time
- Nearly double internal runtime at full load (14 min vs 7.4 min)
- Rated to 50 °C (derating above 40 °C) vs 40 °C
- Faster recharge (1.5 hr vs 2 hr to 90%)
- Shallower rack depth (19.0 in vs 26.9 in)
- TAA compliant; longer 6-year warranty
Side-by-side specifications
| Specification | Xtreme Power P91-2kLi | APC SMTL2K2RM2UCLNC | Advantage |
|---|---|---|---|
| Battery chemistry | Lithium iron phosphate (LiFePO₄) | Lithium iron phosphate (LiFePO₄) | Equal chemistry |
| UPS topology | Online double conversion | Line interactive | P91 – online, zero transfer time |
| Capacity | 2000 VA / 1800 W | 2200 VA / 1920 W | APC – higher VA/W rating |
| Battery life | Up to 15 yr / 3,000–5,000 cycles | 8–10 yr | P91 – up to 2x service life |
| High-temp operation | Up to 50 °C (derate above 40 °C) | Rated to 40 °C | P91 – rated to 50 °C |
| Recharge time | 1.5 hr to 90% | 2 hr to 90% | P91 – faster recharge |
| Runtime at full load | 14 min | 7.4 min | P91 – nearly 2x runtime |
| Rack depth | 19.0 in | 26.9 in | P91 – shallower (19 vs 27 in) |
| TAA compliance | Yes | No | P91 – federal eligible |
| Warranty | 6-year UPS + battery | 5-year UPS + battery | P91 – longer coverage |
Specifications from Xtreme Power’s P91-2kLi vs APC SMTL2K2RM2UCLNC comparison; confirm against current vendor documentation.
Choosing between them
The P91-2kLi leads on topology, runtime, temperature range, recharge, rack depth, and TAA; the SMTL2K2RM2UCLNC offers a slightly higher VA rating and fits APC-standardized line-interactive ecosystems for less demanding loads.
Choose the P91-2kLi if you need
- True online protection with zero transfer time
- Long-life LiFePO₄ batteries
- Longer internal runtime and faster recharge
- Operation in higher ambient temperatures
- Reduced rack depth
- Federal and public-sector procurement eligibility
The APC SMTL2K2RM2UCLNC may fit if you need
- A lithium UPS for less critical IT loads
- Line-interactive protection in an APC-standardized ecosystem
- A higher VA rating with tolerance for transfer events
Frequently asked questions
Topology. The P91-2kLi is online double conversion (zero transfer time, continuously conditioned output), while the SMTL2K2RM2UCLNC is line interactive and transfers to battery on a disturbance. Both use LiFePO4 batteries.
At full load the P91-2kLi delivers about 14 minutes internally versus about 7.4 for the APC, and recharges to 90% in about 1.5 hours versus 2. Battery calendar life also runs up to 15 years versus roughly 8 to 10.
It carries a slightly higher VA/watt rating (2200 VA / 1920 W vs 2000 VA / 1800 W) and fits APC-standardized line-interactive ecosystems. For mission-critical loads needing zero transfer time, the online P91-2kLi is the stronger architecture.
Yes. The P91-2kLi is TAA compliant for federal and public-sector procurement; the SMTL2K2RM2UCLNC is not TAA listed.
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