m.roth at 5-cent.us wrote: >> speaking of UPS's... >> >> I -almost- ordered $300 worth of UPS replacement batteries today, but on >> a hunch, I swapped electronic modules with a twin UPS (the ERM is >> hotswappable on these 2U 3000VA units), and lo and behold, its the ERM >> thats faulty, not the battery pack. found a fleabay ERM for $250 (OEM >> wants $1000). I have 3 of them, all about 5 years old, with 3 2U >> expansion battery packs, for a total of 9 battery packs, $2000-3000 to >> replace all of them. >> > > Um, well.... The beginning of the year, we had a utility shutdown for > repairs, so we shut all our servers down, and the UPSs as well. Brought > them back up after the long weekend... and it took over a month for the > red light to come back. Watch out that the one you swapped doesn't come > back in a few weeks. > when I put the suspect ERM module in the other UPS it faulted. when I put the 'good' ERM back in its own UPS it was good. when I reinstalled the suspect ERM in the original UPS, it faulted. btw, fwiw, these are HP R3000XR UPS's http://h18000.www1.hp.com/products/servers/proliantstorage/power-protection/rackups/r3000xr/index.html, They have been quite good for me, this one ERM failure at 5 years old has been their only problem. with the battery expansion bay, they have like 20 minutes at full load (but I only have like 30-40% load on them). high efficiency, they run cool.