· None of the above quite fits
· None of these quite match
· Nucleus needs UPS to avoid shutting off during power outages
· router tp-link XC220-G3v, Deco M5
What’s your concrete question/issue? You would like to get a recommendation for a UPS?
There are tons of models 
Yes! When we have an outage there is a generador that kicks in after a minute or so. I need something to make the transfer to and from seamless, particularly when i am away from home so i can continue using ARC.
It’s not possible to manage a UPS with the Nucleus (or ROCK.)
However, placing the Nucleus on a UPS will prevent it from shutting down while the generator comes on.
Because, the Nucleus can’t manage the UPS, you should use a control device, e.g., Raspberry Pi, that uses the master socket and USB connection on the UPS.
This can control a proper shutdown on the Nucleus in the event that the generator doesn’t start or fails. There are posts in the forum about this, including the command sent to the Nucleus using http to initiate shutdown.
I use an APC Back-UPS for my server, and this will also shutdown ROCK in the event of a power outage (I don’t have a backup generator.)
How does it shut down Rock if you can’t load software
Just send a web command I think: http://rock/poweroff
The control device sends the power off command @Geoff_Coupe mentioned.
I use apcupsd on Linux, and add something like curl http://rock.local/poweroff to the shutdown script.
Thanks for your help, but I am totally lost and new in this. I am just a music lover and new to Qobuz, and Roon, and Nucleus (which I normally leave on all the time). I don’t know what Rock is.
I live in Bogotá and we have outages about once every couple of days. It is just a momentary loss of power but long enough to shut down the Nucleus. We do have an emergency plant that kicks in if the outage lasts more than a minute or so. And when the power comes back, we have again a brief interruption that shuts down the Nucleus. It is rare but it may happen that this interruption repeats several times within a half hour or so when the grid is too loaded.
My aim is to keep the Nucleus on seamlessly so I don’t have to go turn it on again with every interruption. You surely may not have this issue but if you have Inwiukd love to know which UPS backup would you recommend that provides seamless energy to the Nucleus.
Which Brand/model UPS do you use?
Ignore references to ROCK; it’s a build-your-own Nucleus supported by Roon.
I use an APC Back-UPS ES 550. I sized this to power down my server after 5-10 minutes power failure.
You could connect your Nucleus to a similar UPS and it will provide power during an outage while the generator starts. However, if the generator failed, and the battery depleats, the Nucleus will not shutdown gracefully.
You may also need to change the Nucleus BIOS settings to ensure it starts when power returns.
Since you want to use ARC, you may want to add your router/modem to the UPS, too.
I use both the APC and Cyberpower brands of UPS systems.
My current UPS is CyberPower - 1500VA Sine Wave - CP1500PFCLCD. I use it for the NUC, modem, router, cable box and 16 port Ethernet switch for the short period of time it takes for the backup power system to startup and stabilize. The NUC for protection, network components for obvious reasons and the Tivo cable box because it takes so long to power up and initialize.
I use a separate UPS for the Furman Elite-20 PFi which powers the entertainment system cabinet, everything except for big screens and subwoofers. The CyberPower PFC Sinewave OR2200PFCRT2U is much more expensive for the 20amp circuits.
Also have an APC UPS for the office, computers, monitors and Ethernet switch.
I’m not sure how the automatic component shutdown works, not needed with the whole house backup power system that is up and running in about 30 seconds after the power goes out.
Thanks. Very helpful!
One thing to realize is that lead acid batteries in UPS are not designed for high discharge so they shouldn’t be used to run equipment continuously
Each heavy discharge reduced the life of the battery significantly and replacement is not cheap
Ones for solar panels etc are a different design and can take repeated 80% + discharge
South African user !
This is why a control device is necessary for monitoring power, and shutting down when power isn’t restored. A shutdown signal after, say 5 minutes or battery depletion reaches a threshold is best. A UPS is not intended to run for long periods.
when we were in the midst of our “load shedding” here in South Africa thousands of these lead acid UPS units were sold on the pretext of a replacement power supply. The load shedding was in 2.5 hr. periods sometime 3 times a day.
Many people got a big shock when after a couple of weeks of running their UPS for 2.5 hrs the batteries gave up and needed replacement
As you say they are designed to allow a graceful power down should the main go off , NOT to run your TV all evening
We had two power outages in the past 24 hours due to a huge ice storm. My battery backup gave me plenty of time to shut down my Nucleus and the rest of my Roon system with no issues.
I live in Brazil, where power outages are not uncommon and where many brands of UPSs are sold (oddly, known by the English name “no-break” here). I’ve always found the APC brand to be the best. Here a power interruption is either very short, in which case a UPS gets me through it, or too long to power my devices for the duration, in which case a UPS allows me to perform an orderly shutdown when I’m home.
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