Extend slider (number) beyond min/max value (template)

Configuration
1

Hi,

my car can set the maximum State of Charge to a value between 50% and 100% (in 10% increments). I did implement this like below.

Works fine, does what is supposed to do.

The only niggle I have is aesthetic: The resulting slider in the front end starts at 50% (the lowest possible SoC that can be set), and ends at 100%. Which results that if I select 50% maxSoC, the slider is not in the middle, but at the most left spot.

What I am looking for: A slider that starts at 0%, but the lowest value that can be selected is 50%.

Is there a way to implement this?

My template implementation:

template:
  number:
  - name: "Maximum Charge"
    unique_id: aa52703f-11e4-4a49-a867-d59fee70508f
    state: "{{ states('sensor.maxSoC')|int(0) }}"
    icon: mdi:battery
    unit_of_measurement: "%"
    min: 50
    max: 100
    step: 10
    set_value:
      action: some.action
      data:
        max_soc: "{{ value | int(0) }}"
2

The only way I can think of is to set your number entity minimum to 0% then create an automation to set the number to 50% if it is set below this.

This will have very brief values below 50%, you wont see them but it might upset your car if the API does not check for valid values.

3

Thanks for the answer, could be an idea.
It sounds … messy?

Thomas