Hi Schroedi,
is this the inventory Screen from the device, that stops at provisioning or is this a a screenshot from a completed provisioned device? From your screenshot I can see, the agent is installed in a step after the domain join so I don't think, you have a full inventory with the correct battery Information. That's what Paul mentioned.
To troubleshoot, go to your client's "ldprovisioning" folder and check the logs ordered by time. There you should find something if a variable can't be resolved.
Kind regards
Christian