Fronius Sensor for Home Assistant

This component simplifies the integration of a Fronius inverter and optional PowerFlow/SmartMeter:

• creates up to 22 individual sensors for easy display or use in automations
• converts Wh to kWh
• rounds values to 2 decimal places
• converts yearly and total energy data to kWh or MWh (user-configurable)
• optionally sums values if you have more than one inverter
• supports the new Gen24 inverter (some sensors differs from Symo)

If you have a SmartMeter installed this component:

• optionally connects to PowerFlow API for 5 additional sensors
• optionally connects to SmartMeter API for 8 additional sensors
• optionally converts PowerFlow units to W, kW or MW
• compatible with the custom Power Wheel Card if using PowerFlow

Energy dashboard support - HA 2021.8+

All energy and power sensors provide required attributes to allow long term statistics to be recorded which enables support for the new Energy dashboard introduced in HA 2021.8.

BREAKING CHANGE - HA 2021.9.x

Unfortunately HA 2021.9 breaks energy sensors in earlier releases of this component. To upgrade to HA 2021.9.x, ensure you update to this release immediately afterwards.

2021.8.x can be made compatible by using customize.yaml to override the required entities as follows. These entries are not required if running 2021.9.x or later.

If it doesn't already exist, add the following into configuration.yaml:

homeassistant:
  customize: !include customize.yaml

If it doesn't already exist, create a "customize.yaml" file in the same directory as configuration.yaml and add the following:

sensor.fronius_total_energy:
  state_class: measurement
  last_reset: 1970-01-01T00:00:00+00:00
sensor.fronius_smartmeter_energy_ac_consumed:
  state_class: measurement
  last_reset: 1970-01-01T00:00:00+00:00
sensor.fronius_smartmeter_energy_ac_sold:
  state_class: measurement
  last_reset: 1970-01-01T00:00:00+00:00

Where "fronius" in the sensor name needs to match the name of the integration. Once upgraded to HA 2021.9.x the above entries may be safely removed.

Configuring the Energy dashboard:

The following "lifetime" sensors can be added to the energy configuration:

• Solar production: total_energy
• Grid consumption: smartmeter_energy_ac_consumed (smartmeter required)
• Grid feed-in: smartmeter_energy_ac_sold (smartmeter required)

NOTE: The Energy dashboard expects units to be expressed in kWh otherwise they will not be available to add to the configuration. To resolve this, you must include the following in the Fronius component configuration.yaml entry to ensure units are converted appropriately:

units: kWh

URL's Utilised

The Default URL called is http://ip_address/GetInverterRealtimeData.cgi?Scope=Device&DeviceId=1&DataCollection=CommonInverterData

The optional PowerFlow URL is http://ip_address/solar_api/v1/GetPowerFlowRealtimeData.fcgi

The optional SmartMeter URL is http://ip_address/solar_api/v1/GetMeterRealtimeData.cgi?Scope=Device&DeviceId=1

Installation

Copy the fronius_inverter folder in the custom_components directory into your own custom_components directory in your config directory of Home Assistant.

E.g.:

../config/custom_components/fronius_inverter/__init__.py
../config/custom_components/fronius_inverter/manifest.json
../config/custom_components/fronius_inverter/sensor.py

Be sure to pull raw data from GitHub or use HACS

Configuration

# Minimal configuration.yaml entry:
sensor:
  - platform: fronius_inverter
    ip_address: LOCAL_IP_FOR_FRONIUS

# Example configuration.yaml entry where you can specify the sensors you want:
sensor:
  - platform: fronius_inverter
    ip_address: LOCAL_IP_FOR_FRONIUS
    monitored_conditions:
      - ac_power
      - day_energy
      - year_energy
      - total_energy

# Example configuration.yaml entry where you have more than one inverter:
sensor:
  - platform: fronius_inverter
    ip_address: LOCAL_IP_FOR_FRONIUS
    scope: System

# Example configuration.yaml entry where you have a SmartMeter device and add PowerFlow sensors:
sensor:
  - platform: fronius_inverter
    ip_address: LOCAL_IP_FOR_FRONIUS
    powerflow: True
    power_units: kW

# Example configuration.yaml entry where you have a SmartMeter device and add SmartMeter sensors:
sensor:
  - platform: fronius_inverter
    ip_address: LOCAL_IP_FOR_FRONIUS
    smartmeter: True

Configuration Variables

Custom Power Wheel Card (if using a Powerflow)

Follow the instructions for installation on Github

Add the following to the Lovelace resource config in the Raw Config Editor:

resources:
  - type: module
    url: /local/custom_ui/power-wheel-card.js?v=1

Then add and configure a basic custom card for displaying the power view:

type: 'custom:power-wheel-card'
title: Solar Power
production_is_positive: false
solar_power_entity: sensor.fronius_panel_status
grid_power_entity: sensor.fronius_grid_usage

If you also want to have an energy view in the Power Wheel you need three more sensors. And these sensors will be different depending on if your smart meter is installed in the feed-in-path or consumption-path.

This is the configuration you need to add to your Power Wheel config in Lovelace. This will be the same regardless of where your smart meter is installed.

solar_energy_entity: sensor.fronius_day_energy
grid_energy_consumption_entity: sensor.grid_consumed_energy_day
grid_energy_production_entity: sensor.grid_sold_energy_day

Next you need to create two new sensors for grid energy consumption and production. And this is what will differ depending on your smart meter installation.

1. Feed-in path. This is the simplest setup. With the smart meter in the feed-in path (next to your main electricity meter) it already knows what you are consuming and producing. But it counts the accumulative values. And we need daily vaules, in kWh, to match the sensor.fronius_day_energy.

Create the two sensors for daily consumption and production. Note: if smart meter energy sensors are not in kWh you need to convert those two to kWh using template sensors.

utility_meter:
  # calculate daily energy consumed from grid (input must be in kWh)
  grid_consumed_energy_day:
    source: sensor.fronius_smartmeter_energy_ac_consumed
    cycle: daily
  # calculate daily energy sold to grid (input must be in kWh)
  grid_sold_energy_day:
    source: sensor.fronius_smartmeter_energy_ac_sold
    cycle: daily

2. Consumption path. With the smart meter in the consumption path (between the inverter and your consumers) it cannot know how much you are consuming or producing from/to the grid. So the only sensor that will have a value is the sensor.fronius_smartmeter_energy_ac_consumed. But it will not show what is consumed from the grid. It will show how much your house has consumed. So we need to create sensors that will give us what the Power Wheel needs.

   utility_meter:
   # convert consumed energy to daily energy (this is what the house consumes)
   house_energy_day:
   source: sensor.fronius_smartmeter_energy_ac_consumed
   cycle: daily

   sensor:
   - platform: template
   sensors:
     # calculate grid energy (negative will be to grid, positive from grid)
     grid_energy_day:
       friendly_name: 'Grid energy'
       unit_of_measurement: 'kWh'
       value_template: '{{ (states("sensor.fronius_day_energy") | float - states("sensor.house_energy_day") | float) * -1 }}'
     # calculate energy consumed from grid
     grid_consumed_energy_day:
       unit_of_measurement: 'kWh'
       value_template: >
         {% if states("sensor.grid_energy_day") | float > 0 -%}
           {{ states("sensor.grid_energy_day") | float }}
         {%- else -%}
           {{ 0 | float }}
         {%- endif %}
     # calculate energy produced to grid
     grid_sold_energy_day:
       unit_of_measurement: 'kWh'
       value_template: >
         {% if states("sensor.grid_energy_day") | float < 0 -%}
           {{ states("sensor.grid_energy_day") | float * -1 }}
         {%- else -%}
           {{ 0 | float }}
         {%- endif %}