Fronius Solar Component

Feature Requests
32

Hi, I spent a few days to figure it out, but it is possible to get realtime DC string data out from the inverter by MODBUS TCP instead of using REST API or the integration.
config:

### Modified for new (2021.04) MODBUS config standard
modbus:
  - name: mb_fronius        ### or whatever name
    type: tcp
    host: fronius        ### ip/hostname your inverter has
    port: 502
    sensors:
### AC power scaled:
    - name: mb_fronius_pac_s
      slave: 1
      address: 40083
      count: 1
      data_type: uint
      scan_interval: 15
### AC power scale factor:
    - name: mb_fronius_pac_sf
      slave: 1
      address: 40084
      count: 1
      scan_interval: 10
### Generated energy total scaled:
    - name: mb_fronius_meter_total_s
      slave: 1
      address: 40093
      count: 2
      data_type: custom
      structure: ">L"
      scan_interval: 60
### Generated energy total scale factor:
    - name: mb_fronius_meter_total_sf
      slave: 1
      address: 40095
      count: 1
      scan_interval: 30
### DC string 1 power scaled:
    - name: mb_fronius_pdc1_s
      slave: 1
      address: 40274
      count: 1
      data_type: uint
      scan_interval: 15
### DC string 2 power scaled:
    - name: mb_fronius_pdc2_s
      slave: 1
      address: 40294
      count: 1
      data_type: uint
      scan_interval: 15
### DC string 1&2 power scale factor:
    - name: mb_fronius_pdc_sf
      slave: 1
      address: 40257
      count: 1
      scan_interval: 10


sensors:
  - platform: template 
    scan_interval: 15
    sensors:
### AC power result:
      solar_pac:
        unit_of_measurement: 'W'
        device_class: power
        value_template: >-
          {{ ((states('sensor.mb_fronius_pac_s') | int) * (10 ** ((states('sensor.mb_fronius_pac_sf')| int )) )) | int }}
### Generated energy result:
      solar_meter_total:
        unit_of_measurement: 'kWh'
        device_class: power
        icon_template: "{{ 'mdi:counter' }}"
        value_template: >-
          {{ (((states('sensor.mb_fronius_meter_total_s') | int) * (10 ** ((states('sensor.mb_fronius_meter_total_sf')| int )) ))  | float /1000 ) | round(1) }}
### DC 1 power result:
      solar_pdc1:
        unit_of_measurement: 'W'
        device_class: power
        value_template: >-
          {% if (states('sensor.mb_fronius_pdc1_s') | int ) == ( 65535 | int ) %}        ### for some reason my DC results are jumping between 0 and 65535 when offline, so this is discarded here
            {{ 0 | int }}
          {% else %}  
            {{ ((states('sensor.mb_fronius_pdc1_s') | int) * (10 ** ((states('sensor.mb_fronius_pdc_sf')| int )) )) | int }}
          {% endif %}
### DC 2 power result:
      solar_pdc2:
        unit_of_measurement: 'W'
        device_class: power
        value_template: >-
          {% if (states('sensor.mb_fronius_pdc2_s') | int ) == ( 65535 | int ) %}        ### Only DC1 did the value jump thing, but i have trust issues :)
            {{ 0 | int }}
          {% else %}  
            {{ ((states('sensor.mb_fronius_pdc2_s') | int) * (10 ** ((states('sensor.mb_fronius_pdc_sf')| int )) )) | int }}
          {% endif %}

Inverter is set up like this:
Képernyőkép 2021-01-25 181833

There are lots of more data parts you can get out of the inverter, this works for a SYMO 3 phase - seems it is very dependent on model/year/fw version.
Also you may need a good modbus monitor tool to check the values, my registers were in a -1 offset relative to the modbus documentation from Fronius…

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