Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

The power source (Stromquellen) chart is cut of at around 23:00. In Summary and Now tab

Tested in firefox and chromium

ignore the wrong battery data. it's already mentioned here:
https://github.com/orgs/home-assistant/discussions/1904

Describe the behavior you expected

See the full 24 hours

Steps to reproduce the issue

1. Go to energy/overview or energy/now
2. have power entities configured
3. see chart

What version of Home Assistant Core has the issue?

2025.12.0

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue?

No response

Which operating system are you using to run this browser?

No response

State of relevant entities

Problem-relevant frontend configuration

JavaScript errors shown in your browser console/inspector

Additional information

No response