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I am looking for UPS to backup 1 cable modem, and 1 mikrotik router. I have been trying a brand, but but it was shutdown after a few minutes because its load was under 1%. Both devices measured at around 3 - 4 Watts

Any advice which UPS should I buy?

Thank you

prd
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    I doubt you can find ANY UPS being able to deliver less then 10 W. I'm not aware of their existence. The circuitry in a UPS requires a minimal load (typically >25W) to operate properly. Your best bet is a very small UPS (150-200VA) and add a little extra load to it. A hub or small switch is probably enough. A small light-bulb can also work, if you are not bothered by the light being always on. – Tonny Sep 05 '13 at 07:39

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APC BackUPS is probably the best fit, designed for home computer applications.

You should be able to find one with your local power socket format.

I can't find any evidence on the APC website about the UPS having a minimum power draw...

Tom O'Connor
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  • Yes, but I have contacted APC's representatives here, and they said that their UPS won't function properly with such a low load. I am asking APC directly via their website to confirm. Is there any other suggestion? Brand, or based on your experience, which one can perform correctly? – prd Sep 05 '13 at 07:20
  • Tom is right. APC is the best bet. I have a APC BackupUPS 650 with a single switch on it drawing 2 watts, never had any issues *touches wood* – Zapto Sep 05 '13 at 07:37
  • I have the BackUPS 650 as well, and I won't shutdown with no load. However, there are serious drawbacks to that thing. Look at [my review](http://www.halfgaar.net/apc-ups-cs-650-review). – Halfgaar Sep 05 '13 at 08:10
  • I've never seen a UPS shutdown because it wasn't loaded (enough.) I guess it's a big fat case of YMMV. – Tom O'Connor Sep 05 '13 at 09:30
  • Mine has :D. Anyway I have received an answer from APC, they suggest BE350G – prd Sep 09 '13 at 14:51