UPS for OH server that allows easy integration for automatic shutdown (2024)

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1

I’m looking for a small UPS (a couple hundred watts max, for minutes or a bit more) to cover the OH server. Yesterday lightning strike triggered RCBO and I lost power, so my persistence data is no longer shown on my beautiful graphs. That’s too much for me :wink:

Any recommendations for an UPS that plays nicely with OH?

Option B: any info about UPS that uses an open protocol would be nice as well. I’m already writing one binding for AC unit, so writing another one should be easier :smiley:

2

Please check out the „network ups tools“ project. They have a huge list of supported devices and openHAB has a great binding for integrating the nut-server.
And openHABian can install the nut-server software….

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3

Thank you!! Looks like the device I pre-selected is supported by NUT

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4

could you tell us which one you selected and why?
I use a waveshare with a Pi5, but it has no case yet and thus everything looks a bit nerdy ( not bad but not robust either)

5

I’ll most likely buy this one: https://www.eaton.com/gb/en-gb/skuPage.ELP850IEC.specifications.html
Pros:

  • more than enough capacity for 2 RPI servers
  • I plan to connect all energy efficient lights in the house in the future.It will be velbus system, so an be used with a central power. The should give a few minutes of lights in case of power outage and a nice voltage stabilisation. I have floating mains voltage that dims the lights all the time.
  • I might use the UPS for routers - 510W will be enough for that as well
  • NUT supported (stating the obvious…)
  • I know Eaton from my professional life, it’s not a cheap low quality stuff
  • looks like the battery can be replaced, so I might not need to get en new unit when the battery capacity is too low.
  • 9 min with half load, so with servers only it will last forever :wink:
  • Nice looking display

Cons:

  • working temperature only up to 35 deg C. It might get hot in the attic, so I might need to move it to an air conditioned space

To consider

  • if you plan using it for lights: " This product is an Uninterruptible Power Supply (UPS) for computers and their peripherals, television sets, stereo systems and video recorders… It must not be used to supply other electrical equipment (lighting, heating, household appliances, etc.)"
  • or high temp environment: “Battery service life is reduced by 50 % for every ten degrees above 25 °C”

Price ~250 euro

If you’re looking for an economic solution probably you can get something for 50 euro, but the idea of having the rock bottom price (and potentially quality) equipment with a battery in my house scares me. It might be a short term saving if something goes up in flames.

P.S. I pack the nerdy stuff like rpi into cases that can be fixed in a large DIN rail box. And it’s no longer nerdy when you close the door :nerd_face:
P.S.S. I might be adding more info - the unit arrived today

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