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122 posts

Master Geek


# 177634 10-Aug-2015 09:07
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Does anyone know where I might find a low power, high capacity UPS?

The UPS only needs to provide 50-75 VA/watts but ideally it would have at least 12V/55Ah of capacity. It's to power 12V dc gear (VDSL modems & router).

I know it's efficient to power 12V items from a UPS due to the multiple conversions and I normally 'make' a DC UPS out of an AGM battery and a special charger with a DC supply mode, but in this case  it's going to be installed at someone elses property, I want to use an off the shelf solution to limit liability.


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145 posts

Master Geek


  # 1361905 10-Aug-2015 10:03
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If you're powering 12 volt items, why not just purchase a 12 volt power supply with a decent battery?

There are many commercially available and are much more efficient than a UPS and you can change the battery yourself.

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Ultimate Geek


  # 1361917 10-Aug-2015 10:21
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As above but if you absolutely must have an off the shelf unit then your best with something like the following, There have been a few discussions around it on here recently if you want to try a search and it was designed with this specific purpose in mind.

http://constantvigil.com/shop,shop,2,1,001.html

 
 
 
 


145 posts

Master Geek


  # 1361939 10-Aug-2015 10:35
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Well, Lucky015, that's a perfect solution!

I may have to look into this myself, although I have other off the shelf things I can do as I have an electronics engineering background.
For the general user, this looks very good.

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