Mini-redundant PSU that doesn't break the bank?

[rcxb]

UPSes came up recently here:

Sysadmin Mega Thread

Eaton is the only UPS manufacturer that seems to be trying. All others (I’ve worked with most all of them) do simple float charging of their batteries and scheduled “tests” which just involve blindly switching load over to battery for a few seconds. Eaton’s ABM* at least doesn’t do that, so your UPS doesn’t drop the load during tests when the ba…