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c/ubiquiti · by Buelldozer@lemmy.today · 178d

Does anyone have one of the UniFi UPS units?

If someone has one of the UPS units can you confirm it's behavior when power is restored? From what I've seen / read it does a good job of shutting equipment down but that it can't / won't power things back up, even directly attached equipment.

11 points · 2 comments · view on lemmy.world

2 Comments

jqubed@lemmy.world · 4 pts · 178d (1 reply)

I have no experience with their devices specifically, but is turning equipment back on a common feature for a UPS? I don’t think I’ve ever seen that for consumer systems I’ve personally used in my home, and the systems I’ve used professionally weren’t even configured to shut down equipment because their sole purpose was to hold the load for a minute or two while the generator kicked in.

Buelldozer@lemmy.today · 1 pts · 175d

I have no experience with their devices specifically, but is turning equipment back on a common feature for a UPS?

It's common with the APC / Eaton / CyberPower UPS units that I'm familiar with. Typically you're able to configure how a UPS behaves when utility power is lost and when it's restored, something like:

  1. Line Power Lost - Notify Controller or controlled nodes
  2. Battery power is at x% - You can configure the value for x and when it's reached it notifies the controller or controlled nodes to begin shutdown.
  3. Battery power is at x% - You can configure the value for x and when it's reached it notifies the controller or controlled nodes to hurry their shutdown.
  4. Battery power exhausted and unit shuts down.
  5. Line / Utility power restored - You configure whether the UPS powers back up immediately or waits until the batteries reach a configure state of charge.
  6. Configured behavior happens, the UPS powers back up and applies power to the outlets.

It's 5/6 that I'm really trying to pin down as I'm unclear how it could work any other way. Presumably once the UPS exhausts its batteries the outlets lose power then when power is restored the UniFi devices connected to it should naturally power back on. However it's possible that the UPS doesn't automatically power back on, meaning you have to physically poke the power button, which really limits where and how they can be used.