UPS battery backupsENERGY STAR certified
Delta RT-8K
8,000 VA / 8,000 W double conversion UPS.
Capacity
8,000 VA
8,000 W real power
Topology
Double Conversion
Efficiency
94.5%
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 8,000 VA and 8,000 W, so the equipment plugged into its battery outlets should draw no more than about 6,400 W if you want the usual 20% headroom. How to size a UPS.
Its weighted efficiency of 94.5% compares with a median of 94.8% across 92 certified units within 25% of its capacity. With nothing plugged in it still draws 61.9 W, about $71 a year at 13¢/kWh just to stand ready.
- Maker
- Delta
- Model
- RT-8K
- Apparent power rating
- 8,000 VA
- Real power rating
- 8,000 W
- Power factor
- 1.00
- Topology
- Double Conversion
- Intended use
- Commercial
- Battery
- Valve Regulated Lead-acid Battery
- Runtime at 50% load
- 15 min
- Runtime at 100% load
- 5 min
- Battery warranty
- 3 yr
- Weighted efficiency
- 94.5%
- Efficiency at 25 / 50 / 75 / 100% load
- 94.1% / 94.2% / 94.6% / 94.8%
- Input power at no load
- 61.9 W
- Rack mountable
- Yes
- Rated input voltage
- 200-240 V
- Rated output voltage
- 200-240 V
- Connections
- Serial Port,Ethernet,USB Port
- Size (H x W x D)
- 176 x 440 x 665 mm
- Maker take-back program
- No
- On the market since
- Nov 2018
- ENERGY STAR certified
- 5 Oct 2018
Source: ENERGY STAR certified uninterruptible power supplies dataset, US EPA, record 2327103, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the RT-8K
Certified UPS units from other makers within 25% of its VA rating.
| Model | Capacity | Topology | Efficiency | Runtime @ 50% |
|---|---|---|---|---|
| Eaton 9PX8KPM | 8,000 VA / 7,200 W | Double Conversion | 94.6% | 16 min |
| APC Dell Smart-UPS SRT 8000VA Tower/RM 208V | 8,000 VA / 8,000 W | Multi-Mode Double Conversion | 95.1% | 14 min |
| APC Smart-UPS SRT 8000VA RM 208V | 8,000 VA / 8,000 W | Multi-Mode Double Conversion | 95.1% | 14 min |
| APC Smart-UPS SRT 8000VA RM 208V IEC | 8,000 VA / 8,000 W | Multi-Mode Double Conversion | 95.1% | 14 min |
| APC Smart-UPS SRT 8000VA 208V | 8,000 VA / 8,000 W | Multi-Mode Double Conversion | 95.1% | 14 min |
| APC Smart-UPS SRT 8000VA 208V TAA | 8,000 VA / 8,000 W | Multi-Mode Double Conversion | 95.1% | 14 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 |