APC UPS, ENERGY STAR certified
APC BX850M
850 VA / 510 W line interactive UPS.
APC Back UPS Pro BX850M Compact Tower 850VAAVR LCD 120V
Capacity
850 VA
510 W real power
Topology
Line Interactive
Efficiency
98.8%
weighted, as tested
Runtime @ 50%
9 min
2 min at full load
A UPS has two ratings and the lower one is the limit. This unit is rated 850 VA and 510 W, so the equipment plugged into its battery outlets should draw no more than about 408 W if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 98.8% compares with a median of 98.6% across 189 certified units within 25% of its capacity. With nothing plugged in it still draws 2.5 W, about $2.80 a year at 13¢/kWh just to stand ready.
- Maker
- APC
- Model
- BX850M
- Description
- APC Back UPS Pro BX850M Compact Tower 850VAAVR LCD 120V
- Apparent power rating
- 850 VA
- Real power rating
- 510 W
- Power factor
- 0.60
- Topology
- Line Interactive
- Intended use
- Consumer
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 9 min
- Runtime at 100% load
- 2 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 98.8%
- Efficiency at 25 / 50 / 75 / 100% load
- 98.0% / 98.9% / 99.0% / 99.1%
- Input power at no load
- 2.5 W
- Outlets
- 8 (4 battery + surge, 4 surge only)
- Rack mountable
- No
- Rated input voltage
- 120 V
- Rated output voltage
- 120 V
- Connections
- Serial Port,USB Port
- Size (H x W x D)
- 190 x 91 x 310 mm
- Maker take-back program
- Yes
- On the market since
- Jun 2020
- ENERGY STAR certified
- 17 Oct 2018
Certified under the same record
The maker lists these as the same machine or a variant of it: APC Back UPS Pro BX850M Compact Tower 850VA AVR LCD 120V Factory Serviced, BX850MW, Std Exch APC Back UPS Pro BX850M Compact Tower 850VA AVR LCD 120V, BX850MQ.
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2328150, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the BX850M
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| CyberPower CP825AVRLCDa | 850 VA / 450 W | Line Interactive | 98.9% | 14 min |
| CyberPower CP825LCDa | 850 VA / 450 W | Passive Standby | 98.4% | 14 min |
| CyberPower EC850LCD | 850 VA / 510 W | Passive Standby | 98.5% | 6 min |
| CyberPower S175UC | 850 VA / 510 W | Line Interactive | 98.7% | 9 min |
| Tripp Lite AG-0316 | 850 VA / 425 W | Passive Standby | 99.0% | 9 min |
| Vertiv PST5-850MT120 | 850 VA / 500 W | Passive Standby | 98.5% | 6 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 400VA 120V Slim Flexible Mounting | 400 VA / 220 W | Passive Standby | 98.5% | 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 |