Examples

Examples

Use cases

• Dynamic electricity prices: charge the battery from the grid in the cheap hours (Charge from Grid with Grid charge power) and keep it from discharging while the price is low (Block Discharging).
• Negative prices or an export cap: limit the inverter's output with AC limit enable and AC limit rate, or, with the technician role, only the feed-in with the export soft limit. Setting the export soft limit also switches it on; switch it off in the inverter's web interface.
• Keeping energy for later: hold the battery for the evening or for backup power with Block Discharging, the Modbus storage reserve (it applies in a Modbus storage mode, not in Auto), or the Backup reserve of the inverter's own battery management.
• Monitoring: household load, grid power per phase, battery state of charge and state of health, module temperatures and fans, and why the inverter throttles, all without a cloud connection.
• Modbus only: read the inverter and steer the battery over Modbus without handing Home Assistant a web password (see Web API).

Automations

The automations below go into automations.yaml, as items of its list. The entity IDs are examples; take yours from Settings → Devices & services → Entities. The storage mode is set first, then the value it uses: a mode change resets its rate (see Battery Control).

Charge from the grid at night

Charge the battery from the grid at night, and hand it back to the inverter in the morning:

- id: fronius_battery_grid_charge_night
  alias: "Battery: charge from the grid at night"
  triggers:
    - trigger: time
      at: "02:00:00"
  actions:
    - action: select.select_option
      target:
        entity_id: select.fronius_storage_control_mode
      data:
        option: charge_from_grid
    - action: number.set_value
      target:
        entity_id: number.fronius_grid_charge_power
      data:
        value: 3000
- id: fronius_battery_back_to_auto
  alias: "Battery: back to automatic"
  triggers:
    - trigger: time
      at: "05:00:00"
  actions:
    - action: select.select_option
      target:
        entity_id: select.fronius_storage_control_mode
      data:
        option: auto

Set the grid charge power to a multiple of 10 W (see Battery Control).

Hold the battery while the car charges

Keep the battery from discharging into the car while it charges:

- id: fronius_battery_hold_for_car
  alias: "Battery: hold while the car charges"
  triggers:
    - trigger: state
      entity_id: binary_sensor.car_charging
      to: ["on", "off"]
  actions:
    - action: select.select_option
      target:
        entity_id: select.fronius_storage_control_mode
      data:
        option: "{{ 'block_discharging' if trigger.to_state.state == 'on' else 'auto' }}"

Output off at negative prices

Switch the inverter's output off while the price is negative. AC limit rate limits everything the inverter puts out, not only the feed-in, so the house then draws from the grid, which a negative price pays for. The automation compares the price whenever it changes and again after a restart, a reload of the automations or of the integration, so it never waits for the next crossing of zero; an unavailable price restores the output. It owns the AC limit: whenever the price is not negative it switches off an AC limit set by other means.

- id: fronius_inverter_negative_price
  alias: "Inverter: off at negative prices"
  mode: restart
  triggers:
    # "to: null" leaves out changes of the price's attributes only.
    - trigger: state
      entity_id: sensor.electricity_price
      to: null
    - trigger: homeassistant
      event: start
    - trigger: event
      event_type: automation_reloaded
    - trigger: state
      entity_id: select.fronius_ac_limit_enable
      from: unavailable
  actions:
    - choose:
        - conditions:
            - condition: numeric_state
              entity_id: sensor.electricity_price
              below: 0
          sequence:
            # The rate first: enabling first would apply the old limit for a moment.
            - action: number.set_value
              target:
                entity_id: number.fronius_ac_limit_rate
              data:
                value: 0
            - action: select.select_option
              target:
                entity_id: select.fronius_ac_limit_enable
              data:
                option: enabled
        - conditions:
            - condition: state
              entity_id: select.fronius_ac_limit_enable
              state: enabled
          sequence:
            - action: select.select_option
              target:
                entity_id: select.fronius_ac_limit_enable
              data:
                option: disabled

Notify on inverter errors and warnings

Send a notification for every error or warning the inverter logs at the customer level. For the technician and service levels, enable Service event and add it to the target (see Events and Throttling).

- id: fronius_inverter_event_notify
  alias: "Inverter: notify on errors and warnings"
  triggers:
    - trigger: event.received
      target:
        entity_id: event.fronius_inverter_event
      options:
        event_type:
          - error
          - warning
  actions:
    - action: notify.notify
      data:
        title: "Inverter {{ trigger.to_state.attributes.event_type }}"
        message: >-
          {{ trigger.to_state.attributes.code }}:
          {{ trigger.to_state.attributes.text }}