Question : Problem: Power Estimation for UPS

I have 8pcs of HP ProLiant DL380G5. Have big for the UPS should I need to support 15min and 30min of supply in case of any power interruption.

Thanks

Answer : Problem: Power Estimation for UPS

You need to know what the load is going to be in order to calculate your needs.
Here is the guide for the HP power calculator
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00881066/c00881066.pdf
Here is the MS Excel calculator documented in the guide.
http://h30099.www3.hp.com/configurator/calc/DL580G5.xls
Once you know the load you are dealing with(x8 as you have 8 of them), you can input that into the following UPS sizing calculator
Sign up for APC's UPS runtime calculator
http://www.apcc.com/go/promo/runtime_calc_3/index.cfm?tsk=A705W

Here is the GE UPS runtime calculator
http://www.geindustrial.com/industrialsystems/gede/rtc/runtimeie.html