How to force UPS to shutdown once all loads are down ?

[GueuZav]

Hi all,
I have 3 servers connected on a R3000XR.
All of theses servers are on the same load (1st).
When a power Failure occurs, after the delay I've defined, the shutdown of my servers occurs.

Once all the servers are down, the UPS stay powered on until the battery are depleted.

In order to protect the battery I would initiate an automatic power off of my ups once all the servers are down. Even if a manual power on is necessary, it's ok for me.

Did someone help me to do that ?

I use HP Power Manager 4.1 build 8.

Thanks in advance