Hi there, OS: Debian Squeeze Nut: 2.6.4-2.3 Installation Method: Package (apt-get install nut-server nut-client) Hardware: HP R1500 G3 INT Hardware-Specs: http://h18004.www1.hp.com/products/quickspecs/14059_div/14059_div.pdf The problem: I've installed my R1500 in our data-center and connected it to my server, a HP DL380 G7. This server has redundant power supply, on to the regular power socket, the other one to the R1500 ups. So far this seems to work, but the values from "upsc" looks odd. I figured it out that the problem is the redundant power supply. "upsc" says the most time that the load is 0%. While a heavier process on the server it raised to 11% load. That makes it impossible for me to determine the battery-time on a power outage. The only possible way to get the average load must be to run the server only with the power from the ups, or? Thanks, Jan STDOUT from "usbc hp1500": http://pastebin.com/raw.php?i=dmJHwAMU 0% load http://pastebin.com/raw.php?i=KUQEGf9Q 11% load