Delta UPS, ENERGY STAR certified
Delta RT-15K3P
15 kVA / 15 kW double conversion UPS.
Capacity
15 kVA
15 kW real power
Topology
Double Conversion
Efficiency
95.6%
weighted, as tested
Runtime @ 50%
15 min
5 min at full load
A UPS has two ratings and the lower one is the limit. This unit is rated 15 kVA and 15 kW, so the equipment plugged into its battery outlets should draw no more than about 12 kW if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 95.6% compares with a median of 94.6% across 13 certified units within 25% of its capacity. With nothing plugged in it still draws 176.6 W, about $201 a year at 13¢/kWh just to stand ready.
- Maker
- Delta
- Model
- RT-15K3P
- Apparent power rating
- 15 kVA
- Real power rating
- 15 kW
- Power factor
- 1.00
- Topology
- Double Conversion
- Intended use
- Consumer, Commercial, Data Center
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 15 min
- Runtime at 100% load
- 5 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 95.6%
- Efficiency at 25 / 50 / 75 / 100% load
- 94.8% / 95.8% / 96.0% / 96.1%
- Input power at no load
- 176.6 W
- Rack mountable
- Yes
- Rated input voltage
- 220-240 V
- Rated output voltage
- 220-240 V
- Connections
- Serial Port,Ethernet,USB Port
- Size (H x W x D)
- 88 x 440 x 730 mm
- Maker take-back program
- No
- On the market since
- Jul 2019
- ENERGY STAR certified
- 27 Jun 2019
Certified under the same record
The maker lists these as the same machine or a variant of it: Lithium-ion Battery.
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2340463, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the RT-15K3P
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| Liebert GXT5-15KMVRT11UXLN | 15 kVA / 15 kW | Multi-Mode Double Conversion | 94.4% | 9 min |
| Vertiv GXT5-15KMVRT11UXLN | 15 kVA / 15 kW | Multi-Mode Double Conversion | 94.4% | 9 min |
| TRIPPLITE S3M15K2B | 15 kVA / 15 kW | Multi-Mode Line Interactive | 94.3% | 25 min |
| Vertiv Liebert EXS F5 15k series | 15 kVA / 15 kW | Multi-Mode Double Conversion | 95.0% | 9 min |
| Liebert EXS F5 15k series | 15 kVA / 15 kW | Multi-Mode Double Conversion | 95.0% | 9 min |
| Liebert ITA2 15KVA | 15 kVA / 15 kW | Multi-Mode Double Conversion | 94.5% | 23 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 |