Hello where I live I have an AC that comes with some spikes 235- 248V. I have an ups line interactive pure sinewave . When the Ac input is 239V it activates the AVR correction so the AC output from ups becomes 205-207V. This voltage(205-207V) is kept for long also for 1 or 2 hours
,then the AC input/output from ups can go back to 235-239V. Is it safe to use such kind of ups with EVGA supernova G2 or G3 powersupplies? Can this kind of UPS create a too big AC fluctuation and damage the PSU more than if the power cord was plugged straight into the wall?
Here are some specs f the ups I mentioned.

In the user guide I read also that it's not made to work with active pfc psu,even if I see that the ups uses a pure sinewave.
 

Hello,EVGAtech-LeeM. Thanks for the answer. The link you gave me is very interesting and clarifying doubts about active /passive PFC and simulated sinewave.
However in the discussion I see you mention this:" If the UPS device has a large fluctuation outside of what the PSU's Active-PFC can handle, then you might see some damage. "
 
I see also that in the discussion they say EVGA psu are made to work also with USA AC that is 110V.
Now looking at all of I mentioned above,I go back to my doubt.I am more concerned with the huge fluctuation that my ups can give the psu, during the AVR mode than the backup mode when the output is 230V.
 
During the day, it would go from output =239V to output 205-207V many times and for a couple of hours each every time,if the AVR is working because of spikes above 239V(that is when my ups activates the avr).
If you say that the fluctuation of UPS going from ac to DC mode, could this fluctuation be armful,more than when the ups goes in backup mode?
I mean if fluctuations from 205V- to 240V can be as dangerous as the switch from AC to DC backup mode of ups(considering that my ups would give an output of 205-207V for two hours than back with an output of 239V for other 3 or 4 hours than back with 207V for another couple of hours and so on)?