What size UPS / Battery Back up should I get?
I need to get a surge protector with basic battery back up for my dell tower and monitor. I doubt i’d connect anything else to it that would need battery back up. What size would you recommend? it’s a basic home dell pc tower (not gaming or server usage), monitor is a 19″ LCD. battery back up time just for in case of emergency saving documents and safe computer shutdown. Thank You.
~G
Because the UPS has to compensate for both (in)efficiency of the power supply and the AC power factor the VA rating of the UPS should *always* be higher than the load demand or the unit will overheat when it is under full load (when AC power is cut off)
There is a good UPS back up calc here http://www.csgnetwork.com/upssizecalc.html
To get your PC max load demand use this http://extreme.outervision.com/PSUEngine and for your monitor, LCD average is about 40w CRT is about 100w
using 250W guess for your PC demand and 40W for your LCD I get 406VA min and 650VA recommended.
I always recommend a model that has AVR (Automatic Voltage Regulation) it can quiet a noisy power line, and a removable battery is a bonus.
cheers
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