Our UPSs don't work when needed most. Why?
Posted on 2011-10-11
We usually purchase APC 750 or 1500 rated UPSs to cover some of our more important PCs. Some other brands also such as Belkin. We hook'em up and forget them. We only hook up the CPU box, not the screen or anything else, and the CPU watts are always under the UPS spec. These UPS are not very old, maybe 1 or 2 years.
Expectation: Nothing fancy, just cover the brief power hic-ups and short outages of 30 seconds or less, which is what I care about 99% of the time.
Scenario: City power does go down, say for 10 seconds.
1) At least a third of our protected PCs immediately lose power because the UPS fails to kick in and actually shuts itself completely off.
2) When our City power returns, the UPS do not come back to life and send power thru to the PC, ie. no automatic restarts.
Questions: Are the batteries in these USP simply so lousy that they are only reliable for about a 1 year? Are we really supposed to only use UPSs for 1 year max? Are my reasonable expectations a pipe dream for these UPS? Are there any standalone UPS for PCs that actually work when needed most?
Your comments are appreciated.