UPS efficiency: double-conversion vs bypass-ECO / active high-efficiency mode
94-97% → 98-99%observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Bypass-style ECO (inverter on standby, short break on transfer) and active high-efficiency modes (inverter energized, conditioning held, uninterrupted transfer) are different products that both reach ~98-99%. Contemporary double-conversion designs reach ~97%, so the recoverable delta is product- and load-dependent — take it from measured efficiency curves and acceptance tests, not from the mode name. |
| As of | 2013-01 / 2020-01 |
| Source | Vertiv Liebert EXL S1 UPS datasheet SL-26095 (R01/20): double-conversion (VFI) up to 97%, ECO/VFD above 99%, Dynamic Online up to 99%. The 94% lower bound is The Green Grid's typical double-conversion figure (Jan 2013 Eco Mode white paper). · Datasheet page 2, Typical Functioning Modes; Green Grid Eco Mode white paper (Jan 2013) for typical 94% VFI versus 98% Eco Mode |
| Review | checking…review by 2027-10-16 · standard cadence |
| Recorded changes | last 2026-10-16 · 4 revisions tracked |
| Claim id | ups-efficiency-double-conversion-vs-eco-dynamic |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.