Nibe F750 Dynamic Max Add Power (Grid Aware, Capped)

alias: Nibe F750 Dynamic Max Add Power (Grid Aware, Capped)
description: >
  Dynamically sets max internal add power based on remaining grid headroom,
  excluding current add power. Uses 3 kW daytime weekday limit and 4 kW
  night/weekend limit, rounded down to 0.5 kW, with a hard cap at 4.0 kW.
triggers:
  - entity_id:
      - sensor.sh10rt20_grid_energy_purchasing_power
      - sensor.int_el_add_power_43084
    trigger: state
  - seconds: /30
    trigger: time_pattern
conditions: []
actions:
  - variables:
      grid_kw: "{{ states('sensor.sh10rt20_grid_energy_purchasing_power') | float(0) }}"
      add_kw: "{{ states('sensor.int_el_add_power_43084') | float(0) }}"
      current_limit: "{{ states('number.max_int_add_power_47212') | float(0) }}"
      is_weekday: "{{ now().weekday() < 5 }}"
      is_daytime: "{{ now().hour >= 7 and now().hour < 20 }}"
      grid_limit: |
        {% if is_weekday and is_daytime %}
          3.0
        {% else %}
          4.0
        {% endif %}
      hard_cap: 4
      base_kw: "{{ grid_kw - add_kw }}"
      raw_headroom: "{{ grid_limit - base_kw }}"
      clamped_headroom: "{{ [raw_headroom, 0] | max }}"
      capped_headroom: "{{ [clamped_headroom, hard_cap] | min }}"
      stepped_headroom: |
        {{ (capped_headroom / 0.5) | int * 0.5 }}
  - condition: template
    value_template: "{{ stepped_headroom != current_limit }}"
  - action: number.set_value
    target:
      entity_id: number.max_int_add_power_47212
    data:
      value: "{{ stepped_headroom }}"
  - action: logbook.log
    data:
      name: Nibe F750
      message: >
        Grid={{ grid_kw }} kW (add={{ add_kw }} kW, base={{ base_kw }} kW),
        limit={{ grid_limit }} kW → max add power={{ stepped_headroom }} kW.
mode: restart