[SOLVED] How much UPS take electricity while charging ?

[MoiDixMois]

hello everyone, not sure where to put this question, but i hope this is the right thread

so, i'm on my way building a PC, but currently a bit confused regarding UPS, so i use 600 watt PSU, and as far i as i know , 1100 va UPS should be fine with it, since 0.6 * 1100 = 660 (rough rule of thumb) but what i concern about is the UPS power consumption.
i read the technical spec, it said that the "Battery Charge Power (Watts)" is 19 watts.
is that means if i use it while it still charging it will use additional 19 watts on top of what my PSU use (for example 450 watts out of 600 watts) means the UPS will take about 469 watts from my wall socket ?

thank you in advance

 

[hotaru.hino]

I'm pretty sure the VA rating is how much power the battery can provide. So it wouldn't make sense that the battery charging comes from the battery's own power