UPS backup for Servers

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piggy_rambo

piggy_rambo

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Dec 21, 2016
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I'm wondering if anyone would be able to help me find out what UPS would be suitable for my home network as I have just added new servers and think its time for a battery backup. I currently have 6 x 5W servers, 30W CCTV Server, 10W Router, 50W firewall, 100W NAS Server, 800W VM Server and a D LINK X STACK DGS-3324SR 24 port switch. I'm wanting a UPS that can supply power to these servers on full load while in a blackout for an hour if possible since a normal blackout will last 30 - 45 minutes in my area.
 
Solution
abailey
If you are not 100% sure what your watt usage is it may be worth while to get a meter to see what you are actually pulling and then add a little (maybe 50 or 75%) for growth. A meter like this is not too expensive:
https://www.amazon.com/dp/B000RGF29Q/_encoding=UTF8?coliid=I3V81O42T2TIV7&colid=2M13Q1DVQXYSG

You may not need as big of a UPS as you think.

For example I have a VMWare server at the house that has a 600 watt power supply. It turns out that when running it only uses about 200 watts. Thus a 500VA/300 watt Cyberpower UPS works fine for it.
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Ralston18

Ralston18

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Oct 11, 2014
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Could be tricky to answer.....

It does appear to me that your home network will need heavy duty UPS support. "Heavy duty" meaning "expensive".

However; there are a number of online calculators to help you determine/identify the applicable UPS requirements.

Some of which may favor or "recommend" one manufacturer over another.

First figure out the load and required support time for all servers. Double that (arbitrary) and see if the candidate UPS products will do the job.

The problem is that UPS capabilities are based on ideal "lab time circumstances" and not real world circumstances.

So you need a greater margin of error.

And a 30 -45 minute blackout may push most home/residential UPS to the extreme. Start by looking at commercial/business products.

You appear to have a very good understanding about the expected load and the time necessary to shutdown all supported UPS devices.


 
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abailey

abailey

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Mar 23, 2014
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Yes when you want that kind of load for more than 10 minutes are so your talking alot of money. For example when I put your requirements into the APC online calculator it comes back with a APC Smart-UPS SRT 1500VA ($950) and two SRT48BP (about $500 each) extended run batteries. This would get you to about 50 minutes. You can add more batteries for longer run time (at $500 each). Anyway your looking at $1950 plus probably shipping or tax. Now you may find a little bit less expensive brand like Cyberpower or something but I bet your still looking at $1500. Then there is maintenance. Your batteries will generally last 2 to 4 years. I have a Cyberpower UPS at my house and the batteries lasted about 3 years before they had to be replaced.
 
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piggy_rambo

piggy_rambo

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Dec 21, 2016
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OK I've had a look at power supply calculators but their not really reliable since kept getting different answers from different ones or I'm just too dumb to use them properly but I've realized from what you said that its not feasible to get a UPS that lasts an hour so i'm wondering if getting one that lasts half an hour instead would be realistic?
 
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abailey

abailey

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Mar 23, 2014
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If you are not 100% sure what your watt usage is it may be worth while to get a meter to see what you are actually pulling and then add a little (maybe 50 or 75%) for growth. A meter like this is not too expensive:
https://www.amazon.com/dp/B000RGF29Q/_encoding=UTF8?coliid=I3V81O42T2TIV7&colid=2M13Q1DVQXYSG

You may not need as big of a UPS as you think.

For example I have a VMWare server at the house that has a 600 watt power supply. It turns out that when running it only uses about 200 watts. Thus a 500VA/300 watt Cyberpower UPS works fine for it.
 
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Solution
piggy_rambo

piggy_rambo

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Dec 21, 2016
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Ok good idea I've just ordered one and then I'll add 50% to it to cover growth once I have the actual power reading.
 
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