UPS battery backupsENERGY STAR certified
CyberPower CST135UC
1,200 VA / 800 W line interactive UPS.
Capacity
1,200 VA
800 W real power
Topology
Line Interactive
Efficiency
98.7%
weighted, as tested
Runtime @ 50%
11 min
3 min at full load
A UPS has two ratings and the lower one is the limit. This unit is rated 1,200 VA and 800 W, so the equipment plugged into its battery outlets should draw no more than about 640 W if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 98.7% compares with a median of 98.6% across 266 certified units within 25% of its capacity. With nothing plugged in it still draws 3.4 W, about $3.85 a year at 13¢/kWh just to stand ready.
- Maker
- CyberPower
- Model
- CST135UC
- Apparent power rating
- 1,200 VA
- Real power rating
- 800 W
- Power factor
- 0.67
- Topology
- Line Interactive
- Intended use
- Consumer, Commercial
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 11 min
- Runtime at 100% load
- 3 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 98.7%
- Efficiency at 25 / 50 / 75 / 100% load
- 98.1% / 98.7% / 98.7% / 98.7%
- Input power at no load
- 3.4 W
- Outlets
- 8 (4 battery + surge, 4 surge only)
- Rack mountable
- No
- Rated input voltage
- 110-120 V
- Rated output voltage
- 120 V
- Connections
- USB Port,Ethernet,None
- Size (H x W x D)
- 249 x 99 x 349 mm
- Maker take-back program
- No
- On the market since
- Apr 2021
- ENERGY STAR certified
- 8 Jun 2021
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2405186, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the CST135UC
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| Tripp Lite AG-052B | 1,200 VA / 720 W | Line Interactive | 99.6% | 10 min |
| Tripp Lite AG-06C9 | 1,200 VA / 700 W | Line Interactive | 98.8% | 14 min |
| Tripp Lite AG-06BC | 1,200 VA / 600 W | Line Interactive | 98.8% | 12 min |
| Eaton 5P1150IRT2UG2-L | 1,150 VA / 920 W | Line Interactive | 98.5% | 18 min |
| Tripp Lite AG-87C2 | 1,300 VA / 720 W | Passive Standby | 98.7% | 11 min |
| APC BN1100M2-CA | 1,100 VA / 600 W | Line Interactive | 98.8% | 13 min |
CyberPower
More CyberPower UPS battery backups
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| AVRG1000LCD | 1,000 VA / 530 W | Line Interactive | 98.6% | 10 min |
| BL1250U2 | 1,200 VA / 800 W | Line Interactive | 98.7% | 11 min |
| BL1450U | 1,200 VA / 800 W | Line Interactive | 98.7% | 11 min |
| BRG1000AVRLCD | 1,000 VA / 600 W | Line Interactive | 98.5% | 9 min |
| BRG1500AVRLCD | 1,500 VA / 900 W | Line Interactive | 98.6% | 12 min |
| BRG1500AVRLCD2 | 1,500 VA / 900 W | Line Interactive | 98.8% | 11 min |
| CP1000PFCLCD | 1,000 VA / 600 W | Line Interactive | 98.8% | 9 min |
| CP1000PFCLCDa | 1,000 VA / 600 W | Line Interactive | 99.3% | 8 min |