PR4100 and UPS

I am setting up two PR4100. I want to have a good UPS for each as they will be located several 1000 miles apart. If I use one of the approved UPS systems when the power goes out and the UPS gets to a set level the PR4100 will shut down. Once the power comes back on the UPS will recharge. Will the PR4100 recognize that the power is above the low power threshold and reboot?

I haven’t seen any option to auto reboot of My Cloud but you may try to use power saver option. It will auto shutdown the device at configured time but starts in some configured time interval.
Also auto shut down can be done using ssh but unable to reboot as there would be no power to execute reboot commands.