How to size a UPS
You have decided that you need a UPS. What’s next? Well, you have to pick the right one!
Do it the old fashioned way. Completing these steps is also very useful for the first two alternatives.
1. List all equipment to be protected by the UPS. (Remember to include monitors, external hard drives, routers, etc.)
2. List the amps and volts for each device. These ratings can typically be found on the label on the back of the equipment. Multiply amps by volts to determine VoltAmps (VA). Some devices may list their power requirements in watts. To convert watts to VA, divide the watts by power factor. For servers, the power factor is often 0.9.
3. Multiply the VA by the number of pieces of equipment to get the VA subtotals.
4. Add the VA subtotals together.
5. Multiply the total by 1.2 to get the grand total. This step accounts for future expansion.
6. Use the grand total to select a UPS. When choosing a UPS, be sure that the total VA requirement of supported equipment does not exceed the VA rating of the UPS.
UPS Sizing Worksheet
Eaton’s UPS Tool for iPhone®, iPad® and iPod touch® helps you find the best UPS solution without being tied to your desk: www.powerquality.eaton.com/upstools
- PC, Workstation & Home AV UPS
- Eaton 3S (550-700 VA)
- Eaton Ellipse ECO (650-1600VA)
- Eaton 5E (500-2000VA)
- Eaton 5V (650-1050 VA)
- Eaton 5S (550 - 1500VA)
- Eaton 5L (650-1200VA)
- Eaton Ellipse PRO (650-1600VA)
- Network & Server
- Eaton 5SC (500 - 1500VA)
- Eaton 5P (650-1550 VA)
- Eaton 5PX (1500-3000 VA)
- E Series DX (1-3 kVA)
- Eaton 9E (1000-3000 VA)
- Eaton 9SX (700VA-11 kVA)
- Eaton 9PX (1-3 kVA)
- Eaton 9PX (5-11 kVA)
- Eaton 9E (6-20 kVA)
- Eaton 9155 (8-30 KVA)
- Eaton 9SX (15kVA-20kVA)
- Data Center & Facility UPS
- Eaton 93E XL (10-40 kVA)
- BladeUPS (12-60 kW)
- Eaton 91PS and 93PS (8-30/40 kW)
- Eaton 93PR (25-200 kW)
- Eaton 93E (100-200kVA) HE UPS
- Eaton 93E (15-500 kVA)
- Eaton 93PR (500-600 kW)
- Power Xpert 9395P (250-1200 kVA)
- Power Xpert 9395 (225-1100 kVA)
- Eaton Micro Data Center
- Marine & Offshore UPS
- Eaton 9130 Marine (1000-3000 VA)
- Eaton 9PX Marine (1500-3000 VA)
- Eaton EX Marine (1500-3000 VA)
- Eaton 9155 Marine (8-30 kVA)
- Eaton 9355 Marine (8-40 kVA)
- Power Xpert 9395 Marine (225-1100 kVA)
- DC Power