» Wed Dec 07, 2011 3:38 am
I've got an APC myself, although it's a few years old and been discontinued--the http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BR1500LCD. The recommended replacement for it is http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BR1500G--is that the one you're saying fails after 18 months?
FWIW, APC is probably the best in the UPS business. My current one is still going strong after ~2 years (although it and its replacement may not work as well for you--my PSU is only 750W), no issues. My dad uses a lot of APCs around the house, and he's had one or two just up and die/fail catastrophically. The majority of them are fine, though, aside from needing the occasional battery replacement. (Edit: When you say that they "fail" after 18 months, is that the battery, or the unit as a whole? If the unit itself fails after that time, that's bad. If it's the battery...that's pretty typical.)
Really, the best thing a UPS is for is regulating power surges, or having enough battery backup to keep your computer online long enough for you to shut it down safely in the event of a power failure. You may not need as big a UPS as you think.