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What specs should I look out for UPS
(jlai.lu)
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this post was submitted on 16 Jul 2024
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Whatever would support the combined max wattage of the devices you will connect to it. Ideally something that can handle 50-100% more power. You can control some UPSes via USB or network, so you can hook it up to that mini pc or Pi (why are they separate?) and run NUT on it. You could technically pause a print/shut down a computer/Pi if an outage is more than x seconds to reduce power usage and get through one that you otherwise couldn’t.
"why are they separated", not sure what you meant, mini pc is acting as a server for a few usage and pi is dedicated to klipper.
Yeah, that explains stuff. I thought you might have had some stuff on Pi that you could’ve been running on the PC. In that case I’d recommend that you run the NUT on RPi, and set it to pause print on a power failure, possibly change CPU scaling (i.e. to “powersave” CPU governor if you’re running Linux) on the mini PC, or even possibly shut it down in an event when the power outage lasts longer than a minute.
Actually I could even run Klipper on mini pc but would need a very long usb to reach printer and thought it wasn't ideal. As for the mini pc, I'm running proxmox but I'm far from being an expert so not sure if I can manage CPU scaling.
I am too, and it is really easy to do so. Look up “Linux cpu governor”. NUT (which is the most common UPS management software for Linux) can execute commands, start timers at different events from UPS.
USB has some serious length restrictions, but you can either add a repeater (which in this context, is probably a hub) or use an optical cable with transceivers at each end, something like this.
The hub is probably cheaper if you just need one extra hop.