APC UPS, ENERGY STAR certified
APC Back-UPS 400VA 120V Slim Flexible Mounting
400 VA / 220 W passive standby UPS, model number BV400XU.
Capacity
400 VA
220 W real power
Topology
Passive Standby
Efficiency
98.5%
weighted, as tested
Runtime @ 50%
20 min
6 min at full load
A UPS has two ratings and the lower one is the limit. This unit is rated 400 VA and 220 W, so the equipment plugged into its battery outlets should draw no more than about 176 W if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 98.5% compares with a median of 98.1% across 38 certified units within 25% of its capacity. With nothing plugged in it still draws 1.7 W, about $1.91 a year at 13¢/kWh just to stand ready.
- Maker
- APC
- Model
- APC Back-UPS 400VA 120V Slim Flexible Mounting
- Model number
- BV400XU
- Apparent power rating
- 400 VA
- Real power rating
- 220 W
- Power factor
- 0.55
- Topology
- Passive Standby
- Intended use
- Consumer
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 20 min
- Runtime at 100% load
- 6 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 98.5%
- Efficiency at 25 / 50 / 75 / 100% load
- 97.0% / 98.4% / 98.9% / 99.1%
- Input power at no load
- 1.7 W
- Outlets
- 3 (3 battery + surge, 0 surge only)
- Rack mountable
- No
- Rated input voltage
- 120 V
- Rated output voltage
- 120 V
- Connections
- USB Port
- Size (H x W x D)
- 62 x 170 x 258 mm
- Maker take-back program
- Yes
- On the market since
- May 2021
- ENERGY STAR certified
- 24 May 2021
Certified under the same record
The maker lists these as the same machine or a variant of it: APC Back-UPS 400VA 120V Slim Flexible Mounting Factory Serviced, BV400XUW, Std Exch APC Back-UPS 400VA 120V Slim Flexible Mounting, BV400XUQ.
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2378324, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the APC Back-UPS 400VA 120V Slim Flexible Mounting
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| Amazon Basics ABST400 | 400 VA / 255 W | Line Interactive | 98.3% | 7 min |
| Vertiv PUL-400LVT | 400 VA / 240 W | Passive Standby | 97.8% | 25 min |
| CyberPower ST425 | 425 VA / 260 W | Passive Standby | 97.8% | 6 min |
| CyberPower CP425G3 | 425 VA / 255 W | Passive Standby | 97.9% | 8 min |
| CyberPower SE450G1 | 450 VA / 260 W | Passive Standby | 97.8% | 6 min |
| CyberPower CP350COM | 350 VA / 255 W | Passive Standby | 97.9% | 8 min |
APC
More APC UPS battery backups
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| APC Back-UPS 350 | 350 VA / 210 W | Passive Standby | 98.0% | 20 min |
| APC Back-UPS 350VA X545 120V | 350 VA / 210 W | Passive Standby | 98.0% | 20 min |
| APC Back-UPS 500 (beige) | 500 VA / 300 W | Passive Standby | 98.6% | 15 min |
| APC Back-UPS 500 (black) | 500 VA / 300 W | Passive Standby | 98.6% | 15 min |
| APC Back-UPS 650VA 120V 8 NEMA outlets (4 surge) | 650 VA / 390 W | Passive Standby | 98.8% | 12 min |
| APC Back-UPS BE550G | 550 VA / 330 W | Passive Standby | 98.6% | 13 min |
| APC Power Saving Back-UPS Pro 1500 | 1,500 VA / 865 W | Line Interactive | 98.9% | 13 min |
| APC Power-Saving Back-UPS Pro 700 | 700 VA / 420 W | Line Interactive | 98.9% | 12 min |