Delta UPS, ENERGY STAR certified
Delta RT-1.5K
1,500 VA / 1,350 W double conversion UPS.
Capacity
1,500 VA
1,350 W real power
Topology
Double Conversion
Efficiency
91.2%
weighted, as tested
Runtime @ 50%
12 min
3 min at full load
A UPS has two ratings and the lower one is the limit. This unit is rated 1,500 VA and 1,350 W, so the equipment plugged into its battery outlets should draw no more than about 1,080 W if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 91.2% compares with a median of 98.7% across 153 certified units within 25% of its capacity. With nothing plugged in it still draws 33.7 W, about $38 a year at 13¢/kWh just to stand ready.
- Maker
- Delta
- Model
- RT-1.5K
- Apparent power rating
- 1,500 VA
- Real power rating
- 1,350 W
- Power factor
- 0.90
- Topology
- Double Conversion
- Intended use
- Consumer
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 12 min
- Runtime at 100% load
- 3 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 91.2%
- Efficiency at 25 / 50 / 75 / 100% load
- 88.2% / 90.9% / 91.4% / 91.2%
- Input power at no load
- 33.7 W
- Rack mountable
- Yes
- Rated input voltage
- 100-120 V
- Rated output voltage
- 100-120 V
- Connections
- Serial Port,Ethernet,USB Port
- Size (H x W x D)
- 88 x 440 x 430 mm
- Maker take-back program
- No
- On the market since
- Nov 2018
- ENERGY STAR certified
- 14 Sep 2018
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2325955, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the RT-1.5K
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| CyberPower PR1500RTXL2U | 1,500 VA / 1,500 W | Line Interactive | 98.5% | 19 min |
| CyberPower CP1500AVRTa | 1,500 VA / 900 W | Line Interactive | 98.8% | 12 min |
| APC BX1500M | 1,500 VA / 900 W | Line Interactive | 98.9% | 11 min |
| CyberPower OL1500RT JP | 1,500 VA / 1,350 W | Double Conversion | 90.9% | 11 min |
| CyberPower OL1500RTN JP | 1,500 VA / 1,350 W | Double Conversion | 90.9% | 11 min |
| CyberPower OL1500RTXL2U | 1,500 VA / 1,350 W | Double Conversion | 90.9% | 11 min |
Delta
More Delta UPS battery backups
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| DPH-105K-LV | 15 kVA / 15 kW | Multi-Mode Double Conversion | 95.6% | - |
| DPH-150K-HV | 50 kVA / 50 kW | Multi-Mode Double Conversion | 96.3% | 23 min |
| DPH-250K-HV | 250 kVA / 250 kW | Multi-Mode Double Conversion | 94.9% | 10 min |
| DPH-300K-HV | 50 kVA / 50 kW | Multi-Mode Double Conversion | 96.3% | 12 min |
| DPH-500K-HV | 200 kVA / 200 kW | Multi-Mode Double Conversion | 99.1% | 11 min |
| DPH-60K-LV | 15 kVA / 15 kW | Multi-Mode Double Conversion | 95.5% | 12 min |
| RT PRO-1K | 1,000 VA / 1,000 W | Multi-Mode Double Conversion | 91.4% | 10 min |
| RT PRO-2K | 2,000 VA / 2,000 W | Multi-Mode Double Conversion | 93.4% | 12 min |