Supported Uninterrupted Power Supplies (PR4100)

Guys, I live in an area that it keeps getting power outages, i have seen this link which shows supported UPSes that work with the PR4100, i’m particularly looking for the APC brand, because they are the only ones i’m finding but i haven’t found any of the models listed in the link.

Has anyone here tried a different APC unit that is not listed in the link that works with the PR4100?

Of course it’s important that i want it to be able to let it shutdown normally, sometimes the outages take a long time.