Pressumbly Incorrect Power Source (Grid) Chart display in Energy Dashboard

[DastardlyBaker]

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 value of the Grid Power entity does not correspond to the Scale of the Power Graph in the Energy Dashboard

Describe the behavior you expected

Expected Value in attached screenshot: 0.14kW
Value according to Power sources Scale: > 1 kW

Steps to reproduce the issue

1. Add Power Source entities inside the new energy dashboard

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

state_class: measurement
raw_state: 140
unit_of_measurement: W
device_class: power
icon: ""
friendly_name: Main Power

Problem-relevant frontend configuration

JavaScript errors shown in your browser console/inspector

Additional information

No response