Back-UPS Pro 550 - X9SCM-F - automatic reboot failure after power restore

[Anonymous user]

Hi,

I am running a small server on a Supermicro X9SCM-F mainboard, which allows automatic reboot after power failure. This works if the power supply is directly connected to the grid. When I put my APC Back-UPS Pro 550 between the server and the grid and remove any connection to the power main, my server will shut down properly after a certain threshold is met. Although I reestablish the APC - main grid connection and wait for the UPS to be fully loaded, the server will not automatically reboot. What am I missing?

With kind regards,

Markus

[Anonymous user · Accepted solution]

The next test I did:
I removed the power main cable and allowed the UPS to deplete completely, when I heard the beeping noises of total discharge I reconnected the UPS and my server would start automatically. This is an unwelcome behaviour due to two things:

1st:
A power failure may only last half an hour and therefore the UPS may not be completely depleted until the grid is back on, so no autostart mechanism on the server will be triggered.

2nd:
Rebooting the server right after the UPS is reconnected to the grid with empty batteries may lead to data loss if there is another power failure and the battery is not charged sufficiently to shut the server down properly.

Is there a way to "program" my UPS? I would like to allow power flow only when the batteries are sufficiently charged and to stop it entirely, as long as no power grid connection is established, the battery charge is beneath a specific threshold and the power draw of my server is beneath ~5 Watt (which is standby).

With kind regards,
Markus