UPS for an ONT

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askelon

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#300601 21-Sep-2022 16:38

If I got something along the lines of this: Eaton 5E Tower UPS, 850VA / 480W does anyone have any idea how long it would be able to run a ONT for? It wont need to run anything else, just an ONT, the rest of the gear is run via the house with solar/battery.

I have looked at: PowerShield PSDCMIN1218 Mini UPS 12v/1.5a but its runtime is around 120-150 minutes. Powercuts at my girlfriends place are regular and for extended periods of time (hence the solar/battery backup for the house) - the last one lasted close on 3 days. Unfortunately where the ONT is there is no existing solar/battery setup - its on the other side of the property in the garage with network cables run from there to the house.

I looked at the APC website to try and work things out but didnt have an awful lot of luck.

A rough estimate to times is all I am after thanks!

Jase2985

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#2971050 21-Sep-2022 16:54

https://www.constantvigil.com/shop

designed for ONT and Router. some are BYO battery some integrated.

i run a 28ah battery with the sentry light for my ONT and router and it should last days, and you could swap out for any 12v battery with the right connectors, the MK2 above says 6 hours.

The eaton you linked will be horrible on such a low load, you might get 4-6h out of it because its just so inefficient at those power levels

shk292

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#2971051 21-Sep-2022 16:59

Looking at the specs and brochures, those UPSs are designed to run a relatively high (few hundred watt) load for a few minutes, rather than a low load for hours, as Jase has said. The specs say it is a 12v, 9Ah battery, so in theory that's 108wh of power - dividing that by your load should give you the absolute maximum time.

wellygary

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#2971053 21-Sep-2022 17:03

Go for something that puts out 12V, otherwise you are just spending money on warming up multiple transformers..

The things that will fail in an UPS are the batteries, so something like the Constant vigil linked to above that allowed you to use an external replaceable 12V sealed battery is the best long term option

askelon

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#2971055 21-Sep-2022 17:07

thanks. Those look perfect. I'll forward it onto the boss and see what he has to say!

ratsun81

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#2971120 21-Sep-2022 18:16

askelon:

If I got something along the lines of this: Eaton 5E Tower UPS, 850VA / 480W does anyone have any idea how long it would be able to run a ONT for? It wont need to run anything else, just an ONT, the rest of the gear is run via the house with solar/battery.

I have looked at: PowerShield PSDCMIN1218 Mini UPS 12v/1.5a but its runtime is around 120-150 minutes. Powercuts at my girlfriends place are regular and for extended periods of time (hence the solar/battery backup for the house) - the last one lasted close on 3 days. Unfortunately where the ONT is there is no existing solar/battery setup - its on the other side of the property in the garage with network cables run from there to the house.

I looked at the APC website to try and work things out but didnt have an awful lot of luck.

A rough estimate to times is all I am after thanks!

So for the Eaton 5E Tower, what you must be aware of is the noise this thing makes,

When charging or on battery power it has a small fan that spins at god awful rpm and will make a huge racket.
Unless this UPS is sitting in an isolated environment i would not get this unit.

There are a number of ups around more suitable, some have already recommended.

Also going for more of a brick style ups such as

https://www.pbtech.co.nz/product/UPSPWR1515338/Eaton-3S-850VA--510W-Standby-Powerboard-Desktop-UP

Will eliminate the noise aspect.

As far as longevity goes an ONT wont use much power but UPS are not really designed for long term, they are more for short term outages. You shouldnt expect more than a few hours to power ONT and router.

timmmay

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#2971246 21-Sep-2022 20:37

Constant Vigil units are good. I'd go for the Sentry integrated V2, LiIon battery, flexible, takes solar input or battery pack. My original Sentry Lite is about ten years old and isn't doing so well with newer high current routers, so I may end up with one myself.