ASUS Router UPS …

[kev2021]

Hi all,

As the power frequently goes out during bad weather/wind for a few seconds and coming back on, I’m considering getting a UPS which will power by router and VOIP box.  Main reason being that at present when the power drops, the router and VOIP box comes back on BUT the VOIP box doesn’t register with provider.  I have to go change the port and it works but then after a power cycle it stops again and i change it again and it registers.  So I’m thinking as the power outage is literally for a couple of seconds mostly, getting a UPS would stop it going out as it ultimately means it’s not noticed until you want to use the phone and then realise it wont make a call etc.

However, as I’m at work, I’m a little dubious about leaving the UPS on when no one is home as not sure what could happen if it went wrong, could it catch fire etc or me dangerous in other ways?

Any one have one and they leave it on 24/7/365 and its been ok? Is it ok in lower temps as obviously I keep heating on low when I’m not there.

Last I knew APC were a good make on UPS but things may of changes now or could be better ones.

Thanks

Kev

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[UK Sentinel]

Funny that, I had conversation with ASUS back in May regarding UPS as some users have positive experience with UPS and plugging in their routes, whilst other ASUS router owners have less favorable experiences.

Alas never heard back from ASUS, I will chase them as this is most relevant to your scenario.

—–

When an ASUS router is plugged into an UPS, can you advise what waveform the ASUS routers AC adapters supports as ASUS owners often comment that UPS did not stop router powering off during power cut. I know from my xxxxx days that cheap UPS support a different waveform from the more expensive true sine waveform ?

Thank you in advance .

 

• true sine waveform
• stepped sine waveform
• modified square waveform
• square waveform

 

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[kev2021]

Thanks, very interesting, i thought they simply supplied backup power via battery.. how wrong was I lol

Will be interesting to see if you get a response, they are a bit pricey to buy and test/hope they work ok :)

Kev

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[UK Sentinel]

Life is never that easy …. I will let you know if ASUS get back to me as choosing the correct UPS could save you money

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[kev2021]

Also wondering how much UPS’s cost to run day to day :)

Kev

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[UK Sentinel]

Tricky question that is as it depends on the following …

1. List all the equipment and devices you want the UPS to protect.

2. List the amps and volts for each device. These ratings can typically be found on the label on the back

of the equipment.

3. Multiply amps by volts to determine VoltAmps (VA). Some devices may list their power requirements in watts. To convert watts to VA, divide the watts by power factor.

4. Multiply the VA by the number of pieces of equipment to get the VA subtotals.

5. Add the VA subtotals together to get the total power requirement.

 

Then you have to determine how long you want all the kit to last on the UPS battery to determine the capacity of the UPS ‘backup time’.

Ref: https://unifiedpowerusa.com/ups-load-and-runtime-calculator/

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[kev2021]

So I think from a quick look online the ASUS router will use approx. 10-11 watts and the VoIP box will use approx. 1.5 watts in general usage. Not sure what they mean by power factor?

Usually the power is out for less than a minute so I’d guess need a UPS to last maybe 10mins?

Kev

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[UK Sentinel]

Are you just thinking of a UPS for an ASUS router and VoIP box, I thought you had a few servers (VM) in your house, or are they supported by a different UPS ?

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[kev2021]

No, I have 1 micro server than runs several VMs but that’s in a separate location and can’t be in the same place as the router etc so this is literally for those 2 items.

Kev

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[UK Sentinel]

 

So you need 15w to run your 2x devices (being generous I am)

Runtime = say 30 minuites (easier to work out)

 

Hopefully ASUS will get back to me with suitable wave form for there routers …

.

 

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• This reply was modified 5 months ago by UK Sentinel. Reason: changed values as awaiting feedback from ASUS

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[kev2021]

Yes, thanks.

Kev

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[UK Sentinel]

Haven’t had anything back from ASUS as yet so will keep chasing

But incase you are keen in looking for a new UPS, a few pointers might be useful for yourself.

FWIW:

A normal UPS converts DC to AC and then your router will convert AC back to DC and this process is not efficient.

Most UPS are above 50W as its not worth them manufacturing any less, so if you are looking for a traditional DC to AC then 50W will give you extra capacity and cost around £50 – 60 these can provide you with the UK standard 3 pin options to plug directly into.

A little bulky but something like below, which is on offer currently and has plenty in reserve

https://amzn.eu/d/jkBqYD0

 

 

You can purchase Mini UPS but these can come with 3.5mm connections with direct 12v DC output so you will need to adapt your power wires.

 

 

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[Grisu]

So I think its better to use a UPS with stabilized 12V output instead of converting upto 230V AC and with power adapter back to 12V again.

For sure there may be much better choices, didnt want to search for and took the first: https://www.amazon.co.uk/Mini-10400mAh-Router-Battery-Backup/dp/B0CNT6LLHP/ref=sr_1_16

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• This reply was modified 4 months, 3 weeks ago by Grisu.
• This reply was modified 4 months, 3 weeks ago by Grisu.
• This reply was modified 4 months, 3 weeks ago by Grisu.

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[UK Sentinel]

So have had feedback from ASUS regarding supported UPS waveforms, ASUS (routers division) have spoken with their various power adapter manufacturers and ….

—

ASUS has discussed with their power adapter manufacturers and they (adapter manufacturers) claim the adapter should work with all 4 waveforms.

• true sine waveform
• stepped sine waveform
• modified square waveform
• square waveform

However, there are many manufacturers and some of the older products (adaptors),  ASUS cannot guarantee all work with all 4 waveforms types.

There is a single concern regarding “Modified Square Wave”, since there is a period of time with ‘0’ Volts, the adapter works or not is dependent on the specification of the UPS and the amount of time the adapter spends at ‘0’ volts.

However ASUS believe if the time the wave is at ‘0’ volts is only 2-3 msec then there should be no issues.

 

——

So does sound like ….

Both true sine waveform and stepped sine waveform is a safe option,  modified square waveform is more interesting.

 

Courtesy: https://www.reefcentral.com/forums/showthread.php?t=1961309

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