Uninterruptible Power Supply for My Cloud EX2 Ultra

My Cloud OS 5 My Cloud EX
1

I was wondering about getting an uninterruptible power supply for my My Cloud EX2 Ultra, so that if there’s a temporary power cut in my apartment - as in, for a few seconds, a few minutes - the NAS would remain powered on until the mains power comes back - or if I’m around, I would have time to hibernate the device safely.

The UPS devices I’ve seen at the cheaper end of the scale seem oriented towards quite low-powered devices - however, I’ve found two that are supposed to be able to provide 36 Watts of power for 10-30 minutes - and according to the specs of my EX2 Ultra (2x6GB), 36W is what it needs.

Is there any reason that this would be a bad idea? I’m not experienced with this kind of thing, and I don’t want to introduce something that could ultimately somehow do more harm than good.

1 Like
2

just get a larger USP and power more items

cable modem -router - computers

the real cost in a UPS is generally the batteries.

3

Thanks for your suggestion but it doesn’t answer my question.
My question is if there’s any reason that a lower-spec UPS is specifically a bad idea for a (WD) NAS.

4

I would verify the UPS can command the NAS to shutdown once it reaches a certain level of battery power remaining. This is typically done by a USB connection from the UPS to the NAS. Once the limit is reached, the UPS still needs to have enough reserve to ensure the NAS has shut down gracefully. Make sure you plug it into the battery backup ports and not just the surge protected ones.

I have an APC Backups Pro 1300. I have my EX4, Router, PC and monitor on the powered ports and a few other devices on the surge protected ones. In case the power goes out while I’m online, I can check my utilities site to see if the outage is widespread, then shutdown as needed. If I’m not at home, it will run my EX4 for over an hour before shutting it down when battery power gets to about 15%

5

A UPS that provides 36W for 10-30 minutes should work fine for your My Cloud EX2 Ultra, as long as it meets the power requirements. Just ensure the UPS has pure sine wave output if possible, as some electronics are sensitive to power quality. Also, check that it has automatic voltage regulation (AVR) to protect against minor fluctuations. The only downside could be battery lifespan—cheaper UPS units may have shorter battery life and require replacement sooner. Overall, it’s a good idea for protecting your NAS from sudden power loss.