- sensor:

    - name: tesla_kwh_needed
      unit_of_measurement: "kWh"
      state: >
        {% set capacity = 75 %}
        {% set soc = states('sensor.snowywhite_battery')|float %}
        {% set limit = states('number.snowywhite_charge_limit')|float %}
        {{ ((limit - soc)/100 * capacity)|round(2) }}

    - name: tesla_charge_hours_needed
      unit_of_measurement: "h"
      state: >
        {% set power = 11 %}
        {% set kwh = states('sensor.tesla_kwh_needed')|float %}
        {{ (kwh / power)|round(2) }}