Control Zappi charging based on solar PV.script

alias: Control Zappi charging based on solar PV
description: >-
  Switch the Zappi EV charger on (in Eco mode), or off, depending on the
  availabilty of power from the solar panels. If the charger is already on in
  "Fast" mode, let that run without any interruption (drawing from the grid
  or battery if required).
sequence:
  - alias: Only run during the daytime
    condition: time
    after: "09:00:00"
    before: "21:00:00"
  - alias: Only run if Zappi state is readable, and charger is not in Fast mode
    condition: state
    entity_id: select.myenergi_zappi_20278784_charge_mode
    state:
      - Stopped
      - Eco
      - Eco+
  - alias: Compute available solar PV energy in watts
    variables:
      solar_production_watts: "{{ states('sensor.solis_ac_output_total_power') }}"
      house_usage_watts: "{{ states('sensor.solis_total_consumption_power') }}"
      available_energy_watts: "{{ solar_production_watts|float - house_usage_watts|float }}"
  - alias: Turn on or off the charger based on energy available
    if:
      - condition: template
        value_template: "{{ available_energy_watts > 1500 }}"
    then:
      - alias: If charge_mode is not already Eco, set it to Eco
        if:
          - condition: not
            conditions:
              - condition: state
                entity_id: select.myenergi_zappi_20278784_charge_mode
                state: Eco
        then:
          - device_id: 611b73c52c6236a9d522748e24885061
            domain: select
            entity_id: select.myenergi_zappi_20278784_charge_mode
            type: select_option
            option: Eco
          - service: notify.jmason_org
            data:
              message: >-
                Zappi set to Eco mode, as spare power is {{ available_energy_watts }}W
    else:
      - alias: If charge_mode is not already Stopped, set it to Stopped
        if:
          - condition: not
            conditions:
              - condition: state
                entity_id: select.myenergi_zappi_20278784_charge_mode
                state: Stopped
        then:
          - device_id: 611b73c52c6236a9d522748e24885061
            domain: select
            entity_id: select.myenergi_zappi_20278784_charge_mode
            type: select_option
            option: Stopped
          - service: notify.jmason_org
            data:
              message: >-
                Zappi charging stopped, as spare power is {{ available_energy_watts }}W
mode: queued
icon: mdi:battery-80