Provide remaining battery capacitiy not only in percent, also in kW

[Phoenix-DH]

Checklist

• I have filled out the template to the best of my ability.
• This only contains 1 feature request (if you have multiple feature requests, open one feature request for each feature request).
• This issue is not a duplicate feature request of previous feature requests.

Is your feature request related to a problem? Please describe.

I only have a look to ther percentage and always have to calculate the remaining capacity in kW

Describe the solution you'd like

Have in parallel an additional sensor for kW

Describe alternatives you've considered

For sure you can create an own static sensor, but I can imagine that this sensor is already available somehow.

Thanks.

Additional context

No response

Diagnostics dump

No response