Need help choosing a server UPS?

Question

Iron

It is planned to power 2 servers with a 280-350 W power supply unit from the UPS, as well as a switch and a NAS (these two in total, I think, will give no more than 100 W). I need a UPS for mounting in a 19 "rack.
I read horror stories about the interaction of a UPS and a PSU with APFC, I thought about it. Which PSUs I haven't chosen yet will depend on the server platform, so you won't really choose. Let's say a 350 W PSU with KM = 0.95 and KP = 0.8 - therefore, this is 460 VA. 100 W of the rest of the equipment with KM = 0.7 and KP = 0.65 (figures from the ceiling, because APFC is definitely not there) - this is 220 VA We have a total of 1140 VA, which means I need a 1500 VA UPS that delivers a pure sine wave, right? Or do I need to lay in more power reserve?
If, nevertheless, starting from the figure 1500, then I looked after the APC SUA1500RMI2U and SMT1500RMI2U, but did not understand - are the slight differences between the second and the first worth their difference in price? Or maybe someone will advise something similar, but cheaper, from competing manufacturers? I myself have never dealt with anything other than APC - maybe I missed something ...

Answer 1

Ippon Smart Winner 3000
also has a suitcase with batteries, there are rails in the cabinet, it just needs good ventilation, it’s even better to embed a cooler into it

Answer 2

1. You can’t count power in a “bump”! Firstly, with a large margin, it will work autonomously, and secondly, you never know what you will stick into the rack tomorrow. 3. If the modality of upsa is twice as much as actually consumed, then it can be used on an ongoing basis as an inverter and large batteries (it is often useful, and at the most inopportune moment). 4. It’s better to take a bu model like 6000r - APC Smart-UPS 3000VA RMi2U, SU3000RMX, just unkillable blocks, just change the batteries every five years, but it’s not expensive, if not branded. Look for example here: komok.com/topic.cgi?id=34:44211 or in neighboring ads. With new batteries, take 7 max 8k. If you take with dead and batteries separately, then the kit will come out 4500-5000r.

Answer 3

About 2 years ago I took 3 pieces of IPPON Smart Winner 3000, they are placed both in a rack and separately, they did not cause any complaints during the operation. And in my opinion, they fully justified their price, it is much more pleasant than that of APC.

Answer 4

I understand that they did not complain about the speaker, but about the fan.