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Join Date: Aug 2007
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![]() Quote:
For simple mostly resistive loads, like light bulbs and coffee makers, the two are interchangeable. For more complex loads, you apply a power factor correction, which is typically .7 or 70%. For the common UPS, assume it can power a pure wattage device that equals 60% of it's VA rating (eg: a 1000VA UPS can power a 600W pure resistive load). So, for your 800 watt coffer maker, you need a ups sized at 800/.6 or 1333VA. Round that up a bit for safety so, you'd probably want a 1500VA UPS, with enough battery to run it for the average brew cycle of a coffee pot (~5 minutes). There are a few options, but you're looking for something like this: http://www.tigerdirect.com/applicati...864&TId=2&SF=1 So, for about $340 you can brew one pot of coffee during a power outage. ![]()
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