P80-1100 vs Vertiv Liebert PSI5-1100RT120
The Xtreme Power P80-1100 and Vertiv Liebert PSI5-1100RT120 are 120V, 0.9 power factor pure sine wave line-interactive 2U rack/tower UPS with AVR and an identical 1100 VA / 990 W rating. The P80-1100 adds a longer 3-year warranty, more output receptacles, and wall mounting.
Where the P80-1100 fits
- Longer warranty: 3-year electronics & battery vs the PSI5’s 2-year coverage.
- Eight output receptacles vs the PSI5’s six.
- Tower, wall, 2-post and 4-post mounting (PSI5: tower / rack / 2-post).
- Identical 1100 VA / 990 W rating — comparable real watts.
- TAA compliant as standard; optional XBDM maintenance bypass.
Side-by-side specifications
| Specification | Xtreme Power P80-1100 | Vertiv PSI5-1100RT120 | Advantage |
|---|---|---|---|
| Rated capacity | 1100 VA / 990 W | 1100 VA / 990 W | Identical rating; both 0.9 PF |
| UPS topology | Line-interactive, AVR, sine wave | Line-interactive, AVR, sine wave | Equivalent protection |
| Output receptacles | (8) NEMA 5-15R | (6) NEMA 5-15R | P80 has 8 outlets vs 6 |
| Weight | 30.5 lb | 29.5 lb | Comparable; Vertiv approx 1 lb lighter |
| Dimensions (W×D×H) | 17.2 × 16.1 × 3.5 in (depth incl. bezel) | 17.2 × 16.1 × 3.5 in | Comparable depth |
| Extended runtime | No — internal battery only | Yes — external PSI5-24VBATT | Vertiv extends; for packs step up to the P80-1500 |
| Maintenance bypass | Optional XBDM module | Optional MicroPod | Both offer an optional external bypass |
| Mounting | Tower / wall / 2-post / 4-post | Tower / rack / 2-post | P80 adds wall mounting |
| Management | USB, RS-232, optional Web/SNMP | USB, optional cybersecure RDU120 / IntelliSlot | Comparable; Vertiv RDU120 is UL-2900-1 cybersecure |
| TAA compliance | Yes (standard) | Yes (via TAA SKUs) | Both available TAA-compliant |
| Warranty | 3-yr UPS & battery | 2-yr full unit | P80 one year longer |
Both are identical-rated 1100 VA / 990 W (0.9 PF) 120V line-interactive AVR pure sine UPS, and both offer an optional maintenance bypass and TAA compliance. The P80-1100 leads on warranty (3 vs 2 years), output count (8 vs 6), and wall mounting. The PSI5-1100RT120 accepts an external battery cabinet for extended runtime (the P80-1100 is internal-only at this size) and adds a $400k equipment-protection plan. Confirm Vertiv specifications against current Vertiv documentation.
Choosing between them
Choose the P80-1100 for a longer warranty, more outlets, and wall mounting at the same rating. Choose the PSI5-1100RT120 if you need external-battery extended runtime at this size. If you want external packs from Xtreme Power, step up to the P80-1500.
Choose the P80-1100 if you need
- A longer 3-year warranty
- Eight output receptacles
- Wall or 2-post mounting
- TAA-compliant branch / edge backup
The PSI5-1100RT120 may fit if you need
- External-battery runtime at this size
- A $400k equipment-protection plan
- Cybersecure RDU120 network management
Related comparisons
Specify the right line-interactive rack UPS
Talk to an Xtreme Power specialist about runtime sizing, maintenance-bypass options, TAA-compliant procurement, and rack / wall / 2-post deployment across IT, networking, AV, and regulated environments.