I don't think the intended use-case is servers. The products they list are appliances and less critical electronics.

It has a 20 ms switch-over to battery backup. APC UPS' range from 2 - 6 ms.

There is a StackOverflow answer that says the upper limit for servers is 25 ms but 20 ms might be cutting it fine.

https://serverfault.com/questions/564156/what-is-the-interru...