On 05/12/2013 01:11 PM, Nicholas Leippe wrote: > I would still use an APC in a data center environment--mounted in metal > racks above fire-proof floors I wouldn't worry about them venting gas or > getting hot when they fail. But not in my home on my wood floor or in my > carpeted office. > I don't trust them even in that situation. I have one that's at least 30kVA in one of my server rooms. It was off-line for some time due to problems with it's fan controllers, as well as the normal loss of some of the batteries. It was off-line when I first started working here, but I get the impression is went out shortly before or after the warranty expired. Eventually it was repaired (on our dime I think), but I don't like to use it. In a power event, if they ever get down to a low threshold (like 10% remaining) they shutdown, and require a service technician to bring them back up.
I have 4 other Mitsubishi UPSs ranging from 30kVA to 100kVA, and they can drain all the way to zero, shutoff, and I can bring them back up myself without having to arrange for a service call. The only problem I've ever had was with their original netcom monitors. After about ten years of service a few of the monitors forgot their MAC and start using an all zero MAC address. There was no documented way to reset the MAC, nor could I figure it out from the ethernet chip's whitepapers. Eventually I gave up and replaced the bad ones with the newer netcom 2 monitors, and haven't had any trouble since. I've never had a small desktop Mitsubishi UPS. I know of another systems group that used them for a while but decided to switch to APC after a lot of their netcom monitors did the same thing as mine. That was a few years ago, so I don't know if they ever regretted the decision. Myself, I had a tripplite at home for about three years, and it was a good little box. I don't think the battery was replaceable though. /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
