UPS battery backupsENERGY STAR certified
Liebert 51SA050BAA
50 kVA / 50 kW multi-mode double conversion UPS.
Capacity
50 kVA
50 kW real power
Topology
Multi-Mode Double Conversion
Efficiency
96.4%
weighted, as tested
Runtime @ 50%
10 min
5 min at full load
A UPS has two ratings and the lower one is the limit. This unit is rated 50 kVA and 50 kW, so the equipment plugged into its battery outlets should draw no more than about 40 kW if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 96.4% compares with a median of 96.2% across 40 certified units within 25% of its capacity. With nothing plugged in it still draws 338.7 W, about $386 a year at 13¢/kWh just to stand ready.
- Maker
- Liebert
- Model
- 51SA050BAA
- Apparent power rating
- 50 kVA
- Real power rating
- 50 kW
- Power factor
- 1.00
- Topology
- Multi-Mode Double Conversion
- Intended use
- Consumer, Commercial, Data Center
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 10 min
- Runtime at 100% load
- 5 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 96.4%
- Efficiency at 25 / 50 / 75 / 100% load
- 95.9% / 96.6% / 96.4% / 96.2%
- Input power at no load
- 338.7 W
- Rack mountable
- No
- Modular
- Yes
- Rated input voltage
- 480 V
- Rated output voltage
- 480 V
- Connections
- Serial Port,Other,USB Port,Ethernet
- Size (H x W x D)
- 2000 x 608 x 994 mm
- Maker take-back program
- No
- On the market since
- Dec 2015
- ENERGY STAR certified
- 23 Jan 2019
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2335462, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the 51SA050BAA
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| Vertiv 51SA050BAA | 50 kVA / 50 kW | Multi-Mode Double Conversion | 96.4% | 10 min |
| Schneider Electric Galaxy VS UPS 50kW 480V with N+1 power module | 50 kVA / 50 kW | Multi-Mode Double Conversion | 95.5% | - |
| Delta DPH-300K-HV | 50 kVA / 50 kW | Multi-Mode Double Conversion | 96.3% | 12 min |
| Delta DPH-150K-HV | 50 kVA / 50 kW | Multi-Mode Double Conversion | 96.3% | 23 min |
| Eaton S3M50K | 50 kVA / 50 kW | Double Conversion | 95.5% | - |
| Vertiv EXS 0040kTH16FN01000 | 40 kVA / 40 kW | Multi-Mode Double Conversion | 95.8% | 20 min |
Liebert
More Liebert UPS battery backups
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| 10B14763GG103 | 450 kVA / 405 kW | Multi-Mode Double Conversion | 97.2% | 30 min |
| 10B14789GF103 | 825 kVA / 743 kW | Multi-Mode Double Conversion | 97.7% | 30 min |
| 47SA040A[0|1|2|3][C|Y][0|F|H|M|G|L][0|1] | 10 kVA / 10 kW | Multi-Mode Double Conversion | 94.2% | 34 min |
| 47SA100A[0|1|2|3][C|Y][0|F|H|M|G|L][0|1] | 60 kVA / 60 kW | Multi-Mode Double Conversion | 95.8% | 10 min |
| 47SA120A[0|1|2|3][C|Y][0|F|H|M|G|L][0|1] | 120 kVA / 120 kW | Multi-Mode Double Conversion | 95.6% | 10 min |
| 51SA030QAA | 30 kVA / 30 kW | Multi-Mode Double Conversion | 96.3% | 10 min |
| 51SA030QBA | 30 kVA / 30 kW | Multi-Mode Double Conversion | 95.2% | 10 min |
| 51SA160AQA | 40 kVA / 40 kW | Multi-Mode Double Conversion | 95.5% | 10 min |