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DC UPS for router? (retrofed.com)

submitted 2 days ago by voyagertest@retrofed.com to c/selfhosted@lemmy.world

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Hi y'all looking for advice here

I selfhost a nextcloud server and a NAS for backups, and one of my challenges has been data corruption after power failures.

I went and bought some consumer UPS units about 5 years ago, which helped, but now the batteries are starting to fail, and I'm not protected from power outages until I replace them.

I have the router on UPS as well so the computers can communicate with each other that the power has failed and it is time to gracefully shut down (using NUT).

However the router itself uses quite a bit of power and I am hoping to make a smarter decision this time around when getting a UPS.

The router's power supply is 12V5A with a barrel style jack, so i have been searching for "DC UPS 12V 5A" to try and find something compatible that wastes less energy converting from battery DC to AC for the power supply to then convert back to DC.

But the only thing I've been able to find are these units designed to power electric doors: https://www.amazon.com/dp/B0D8VLPRN2/

I'm not sure if this would even be safe to use with a router, and i don't know how i would wire it up to the router either.

I think i just don't have enough knowledge to know how to shop for an appropriate DC UPS, or if such a thing even exists.

Anyone been in a similar situation?

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[–] pHr34kY@lemmy.world 6 points 2 days ago* (last edited 2 days ago) (1 children)

I did this once with a router. I just bought a 12V SLA battery (a UPS battery) and a car float charger (sometimes called a "battery maintainer"). The charger was always connected to the battery, so it was pumping about 13V into the router. The router could withstand it. It's easy enough to get a voltage regulator if it's an issue, but most hardware already does it to an extent. It was DC all the way.

If I want 5V, I get a car USB charger and stick it inline.

[–] voyagertest@retrofed.com 1 points 2 days ago

How did you wire the battery up to the router, with the car battery maintainer attached?