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Old 05-22-2016, 04:42 PM   #11
twistedtree
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City: Vermont
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OK, much more complicated (and sophisticated) than I imagined. I was assuming an inverter with internal bypass relay - most of those switch quickly after qualifying the AC power source.

Based on what you have, just hooking up a dedicated battery to the UPS seems like the most straight forward and robust approach.
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