Best Uninterruptible Power Supplies · head-to-head

Eaton 5S1500LCD vs Vertiv Liebert PSA5-1500MT120

A sourced, side-by-side comparison. Eaton 5S1500LCD is cheaper at $335. Every spec and price links to its source.

Full spec sheet

✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.

Spec Eaton 5S1500LCD Vertiv Liebert PSA5-1500MT120
US price $335 —
BrandEatonVertiv
Released——
Topology line-interactive line-interactive
Capacity (VA) 1500 1500
Output watts 900 900
Waveform — —
Battery backup outlets 5 5
Battery type sealed-lead-acid sealed-lead-acid
Runtime half load (min) — 11
Recharge time (hr) — —
Surge protection joules — 316
Has LCD display Yes Yes
Form factor tower tower
Weight (kg) — —

Sources — Eaton 5S1500LCD: staples.com (verified 2026-07-11). Vertiv Liebert PSA5-1500MT120: vertiv.com (verified 2026-07-11).

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