W Box UPS, ENERGY STAR certified
W Box 0E-350V6
350 VA / 255 W passive standby UPS.
Capacity
350 VA
255 W real power
Topology
Passive Standby
Efficiency
97.9%
weighted, as tested
Runtime @ 50%
8 min
2 min at full load
A UPS has two ratings and the lower one is the limit. This unit is rated 350 VA and 255 W, so the equipment plugged into its battery outlets should draw no more than about 204 W if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 97.9% compares with a median of 97.9% across 16 certified units within 25% of its capacity. With nothing plugged in it still draws 2.8 W, about $3.19 a year at 13¢/kWh just to stand ready.
- Maker
- W Box
- Model
- 0E-350V6
- Apparent power rating
- 350 VA
- Real power rating
- 255 W
- Power factor
- 0.73
- Topology
- Passive Standby
- Intended use
- Consumer
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 8 min
- Runtime at 100% load
- 2 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 97.9%
- Efficiency at 25 / 50 / 75 / 100% load
- 95.8% / 97.9% / 98.5% / 98.7%
- Input power at no load
- 2.8 W
- Rack mountable
- No
- Rated input voltage
- 120 V
- Rated output voltage
- 120 V
- Connections
- None
- Size (H x W x D)
- 81 x 180 x 109 mm
- Maker take-back program
- Yes
- On the market since
- Feb 2019
- ENERGY STAR certified
- 11 Aug 2023
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2333802, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the 0E-350V6
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| CyberPower CP350COM | 350 VA / 255 W | Passive Standby | 97.9% | 8 min |
| CyberPower CP350SLG | 350 VA / 255 W | Passive Standby | 97.9% | 8 min |
| Tripp Lite AG-0306 | 350 VA / 210 W | Passive Standby | 98.7% | 7 min |
| 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 |
| Vertiv PST5-350MT120 | 350 VA / 200 W | Passive Standby | 97.6% | 11 min |
W Box
More W Box UPS battery backups
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| 0E-1000V9RD | 1,000 VA / 600 W | Line Interactive | 98.6% | 9 min |
| 0E-1000VASNM | 1,500 VA / 900 W | Line Interactive | 99.3% | 11 min |
| 0E-1500V10RD | 1,500 VA / 900 W | Line Interactive | 98.6% | 12 min |
| 0E-1500VASNM | 1,500 VA / 900 W | Line Interactive | 98.9% | 18 min |
| 0E-825V12VRD | 825 VA / 480 W | Line Interactive | 98.6% | 10 min |
| 0E-850V8LCD | 850 VA / 510 W | Passive Standby | 98.5% | 6 min |
| 0E-RCKMT1000 | 1,000 VA / 700 W | Line Interactive | 98.8% | 17 min |
| 0E-RCKMT1500 | 1,500 VA / 1,050 W | Line Interactive | 98.9% | 16 min |