OpenDTU Zero-Injection: Automatically limit inverters based on grid excess power with Home Assistant and OpenDTU up to a configurable Setpoint

README.md

OpenDTU Zero-Injection: Automatically limit inverters based on grid excess power with Home Assistant and OpenDTU up to a configurable Setpoint

Overview

This HA package allows you to automatically change your inverter production limit to match your home consumption in order to avoid an excessive grid excess.

It also integrates with 3ERL: depending on 3ERL API, the integration will either automaticlaly allow some production excess (when market electricity prices are positive, to make money) or will automaticlally regulate the production limit to avoid any excess when market electricity prices are negative.

Toolbar

The toolbar lets you view and control the main configuration and state:

• Max: the maximum nominal power of the inverters (400W, 500W, 1000W, etc)

• Limit: the current production limit applied to inverters (10 - Max Watts)

• Producing: the number of inverters currently producing power

• 3ERL Trend: 3ERL trend of the day as reported at https://3erl.fr/PREP_Profile.php

• 3ERL Zero-Inject: status when 3ERL asks to limit the production (see their API at https://3erl.fr/api.json). When asked to limit, this icon becomes red and the production limit will be adjusted to match your home consumption.

• Setpoint: this is the desired level of excess to try to match. Thsi value is automatically managed but can be manually overriden also for testing.

• Production: your total production of your solar plant

Left Section - Monitoring

Global Home Power Flowing

This cool chart allows you to see how the power is flowing from the grid and from the solar panels to your house. I also added my OpenEVSE car charger,water heater and some other stuff but these are optional.

What is important:

• The grid voltage: useful to monitor during production spikes to troubleshoot high grid voltage causing inverters to stop
• The grid power (positive or negative)
• The produced solar power
• The maximum voltage of all inverters: inverters are increasing their voltage compared to the grid: the more the powr the more the voltage difference increases, which is more likely to reach the voltage limit when they stop producing and wait

Inverter Power

This section allows you to see each inverter AC power output.

The recycle icon allows you to retsart an inverter, which can be useful if it stopped producing for some reaosns and you want to reboot it before it recovers by itself.

Inverter Limit

This section displays the live inverter limit for each one and the recycle icon allows you to quickly reset an inverter's limit to 100%.

Right Section - Graphs

The graphs on the right allows to monitor the power, energy, temperature and limits. One of them is special: the PRE graph, which displays the evolution of the electricity marker prices (PRE+ and PRE-) used by 3ERL for monetization.

Each graph is grayed out for the period when 3RL asked to limit our production. This is a way to easily see what happens to the power, energy, limit, etc depending if it was a period where we had to limit our production or we were allowing to inject in the grid network.

Installation

OpenDTU

First configure your inverters in OpenDTU with an appropriate naming like Inverter S/N and activate HA integration.

You sensors in HA should be something like: sensor.inverter_1410a01e2cdd_*

WARNING

OpenDTU can only send one command at a time and reading inverter data or sending commands take about 1 second per inverter.

So this is a tradeoff between reading data fast and be up to date (OpenDTU polling can be 3 seconds), and have a slower correction time (1 minute), or at the opposite do not mind about readings (DTU polling 10 sec) and favor speed of updating limits (trigger could be 20 sec).

For monitoring purposes and to detect issues I prefer having a fast refresh, so I set my DTU polling to 3 seconds and my update limite rate 1 per minute.

Open OpenDTU console and look for log lines like this:

[14:42:58.575] I (1013189) hoymiles: Queue size - NRF: 0 CMT: 8

These indicate the number of messages sitting in the queue waiting to be processed and you will see the communiction errors. This number should at one point in time go down to 0 or at least be able to go down. You can look also at the last time data was updated in OpeNDTU interface for all inverters. The more you have a big last update time, the more teh DTU is unable to read your inverters.

solar.yaml

Make sure you have configured Home Assistant to support packages.

homeassistant:
  packages: !include_dir_named packages

Put the file solar.yaml in the packages folder:

Edit solar.yaml according to your needs.

I have left some TODO comments in the file to indicate what to do.

view.yaml

• Edit your current dashboard
• Add a new view
• Click on the 3 points on the right to display the yaml of the view
• Paste the content of view.yaml

To work properly, you will need to install these frontend plugins from HACS:

• Power Flow Card Plus
• Lovelace Entity Progress Card
• Plotly Graph Card
• Bar Card

solar.yaml

##
# Automatically limit inverters based on grid excess with Home Assistant and OpenDTU
# by Mathieu Carbou
# Ref: https://gist.github.com/mathieucarbou/382556f1279d612962e03232544692d1
##

# https://www.home-assistant.io/integrations/input_number
input_number:
  # Inverters nominal power, usually 400W, 500W, 1000W, etc
  inverters_nominal_power:
    name: Inverters Nominal Power
    unit_of_measurement: W
    min: 0
    max: 2000
    step: 1
    mode: box
  # Target excess or import to stay close to
  inverters_excess_setpoint:
    name: Inverters Excess Setpoint
    unit_of_measurement: W
    min: -10000
    max: 10000
    step: 1
    mode: box
  # Limit sent to inverters
  inverters_power_limit:
    name: Inverters Power Limit
    unit_of_measurement: W
    min: 0
    max: 2000
    step: 1
    mode: box

# https://www.home-assistant.io/integrations/rest
rest:
  # Get the 3ERL trend (https://3erl.fr) and limit status and expose them in sensors
  - resource: https://3erl.fr/api.json
    scan_interval: 60
    binary_sensor:
      - name: "3ERL: Bridage Demandé"
        icon: "mdi:car-speed-limiter"
        unique_id: 347A6F4D-6B09-4A20-9C2C-D611ED23EF4B
        value_template: "{{ value_json['Bridage'] }}"
    sensor:
      - name: "3ERL: Tendance du jour"
        icon: "mdi:trending-up"
        unique_id: 31F1BED4-8100-44A4-88BA-DB45450611CF
        # multiply by 10 because the value is in c€/kWh
        value_template: |
          {% set data = value_json['PREP_Profile'] %}
          {% if data == '3+' %}   🟢🟢🟢
          {% elif data == '2+' %} 🟢🟢
          {% elif data == '1+' %} 🟢
          {% elif data == '0' %}  ⚠️
          {% elif data == '1-' %} ⛔️
          {% elif data == '2-' %} ⛔️⛔️
          {% elif data == '3-' %} ⛔️⛔️⛔️
          {% else %}              ⁉️
          {% endif %}

  # Get the electricity market price trend from RTE for the PRE graph
  - resource_template: https://www.services-rte.com/cms/open_data/v1/price/table?startDate={{ now().strftime('%d%%2F%m%%2F%Y') }}
    scan_interval: 60
    sensor:
      - name: "Électricité: Prix de règlement des écarts positifs"
        icon: "mdi:currency-eur"
        unique_id: EA2D2A8C-5327-47C8-92EF-C16E9BE7A4C5
        state_class: measurement
        unit_of_measurement: "€/MWh"
        value_template: "{{ value_json['values'][0]['pre']['positive'] | float }}"
      - name: "Électricité: Prix de règlement des écarts négatifs"
        icon: "mdi:currency-eur"
        unique_id: 95AE2165-7E9A-40BA-A555-1C7B7B93B26D
        value_template: "{{ value_json['values'][0]['pre']['negative'] | float }}"
        state_class: measurement
        unit_of_measurement: "€/MWh"

template:
  # https://www.home-assistant.io/integrations/sensor/
  - sensor:
      # Compute the number of inverters currently producing power
      # !! TODO !! Put your inverter S/N in this list in lowercase, any order
      - name: Inverters Producing Count
        unique_id: 7FAAECB4-2105-4F86-B63E-A1962F7FC81E
        state: >-
          {{ ['1410a01ec916', '1410a01ed6ca', '1410a01ed5a9', '1410a01ed5f0', '1410a01f092d', '1410a01ed604', '1410a01f010c', '1410a01e2cdd']|map('regex_replace', '(.+)', "sensor.inverter_\\1_power")|map('states')|map('float', 0)|select('gt', 0)|list|count }}

      # Total Solar Production Power
      # !! TODO !! Make sure you have a sensor called Solar Production Power which reflects your total plant production power.
      # In my case, I have 2 production groups, so I create a sensor which summarizes both here.
      - name: Solar Production Power
        unique_id: "01e37eed-3045-4eee-a786-1249567fe300"
        state_class: measurement
        device_class: power
        unit_of_measurement: W
        state: "{{ states.sensor.solar_plant_group_a_power.state|float(0) + states.sensor.solar_plant_group_b_power.state|float(0) }}"

      # Home Consumed Power: power consumed by your house == the produced power plus the measured grid power
      # !! TODO !!configure your sensor measuring your grid power here. Mine is a Shelly and is called: sensor.grid_power
      - name: Home Consumed Power
        unique_id: BE34D1AD-AB8E-4909-ACE0-BBA7D3877105
        state_class: measurement
        device_class: power
        unit_of_measurement: W
        availability: "{{ ['sensor.solar_production_power', 'sensor.grid_power']|map('states')|map('is_number')|min }}"
        state: "{{ states.sensor.solar_production_power.state|float + states.sensor.grid_power.state|float }}"

      # Grid Returned Power: this is the gros power returned to the grid, or 0 if no excess
      # !! TODO !! configure your sensor measuring your grid power here. Mine is a Shelly and is called: sensor.grid_power
      - name: Grid Returned Power
        unique_id: "01e37eed-3045-4eee-a786-1249567fe214"
        state_class: measurement
        device_class: power
        unit_of_measurement: W
        availability: "{{ ['sensor.grid_power']|map('states')|map('is_number')|min }}"
        state: "{{ 0 - [states.sensor.grid_power.state|float, 0] | min }}"

      # Solar Consumed Power: This is the produced power consumed by your house
      - name: Solar Consumed Power
        unique_id: "01e37eed-3045-4eee-a786-1249567fe303"
        state_class: measurement
        device_class: power
        unit_of_measurement: W
        availability: "{{ ['sensor.solar_production_power', 'sensor.grid_returned_power']|map('states')|map('is_number')|min }}"
        state: "{{ [states.sensor.solar_production_power.state|float - states.sensor.grid_returned_power.state|float, 0] | max }}"

      # This sensor tries to calculate the daily consumed energy by your house, which is the produced energy + grid imported energy
      # c == this sensor last value (consumed solar production)
      # p == daily solar production
      # e == daily return to grid (loss)
      # we should always have: p >= c and p >= e
      # At midnight, yield day resets but not at the same time so we can have p < c or p < e
      # When not at midnight, we compare last value of c with newly computed value (c == p - e)
      - name: Solar Consumed Energy Daily
        unique_id: "01e37eed-3045-4eee-a786-1249567fe305"
        state_class: total_increasing
        device_class: energy
        unit_of_measurement: kWh
        state: >-
          {% set p = states.sensor.inverters_energy_meter_daily.state|float(0) %}
          {% set c = states.sensor.solar_consumed_energy_daily.state|float(0) %}
          {% set e = states.sensor.grid_energy_returned_meter_daily.state|float(0) %}
          {{ [0 if p == 0 or p < c or p < e else c, [0, p - e] | max] | max }}

      # This sensor computes your autoconumption ratio
      # This data is measleading through when you are registered to 3ERL, because sometimes you need to reach a 100% ratio, and sometimes you do not have to, in order to make money.
      - name: Solar Autoconsumption Level Daily
        unique_id: "01e37eed-3045-4eee-a786-1249567fe304"
        state_class: measurement
        unit_of_measurement: "%"
        availability: "{{ states('sensor.inverters_energy_meter_daily')|float(0) > 0 }}"
        state: "{{ [100, (100 - 100 * states('sensor.grid_energy_returned_meter_daily')|float(0) / states('sensor.inverters_energy_meter_daily')|float )] | min }}"

sensor:
  # https://www.home-assistant.io/integrations/integration/
  # Solar Production Energy: accumulated energy of your solar plant
  # This could be your Shelly if you have a simple setup, but since I have several groups, I am computing the energy based on my total produced power
  - platform: integration
    name: Solar Production Energy
    unique_id: E85A7E482-7937-4ABC-A0C6-1B9790DF417F
    source: sensor.solar_production_power
    unit_prefix: k
  # Home Consumed Energy
  - platform: integration
    name: Home Consumed Energy
    unique_id: E2BA4424-8CA8-4D74-9A2F-F0E5EFF84622
    source: sensor.home_consumed_power
    unit_prefix: k

# https://www.home-assistant.io/integrations/utility_meter/
utility_meter:
  # Grid Energy Returned Meter Daily: Daily meter for the grid returned energy.
  # Mine comes from a Linky key which is far more reliable than a Shelly since reads the counters directly stored in the Linky
  # !! TODO !! set your grid returned energy sensor here
  grid_energy_returned_meter_daily:
    name: Grid Energy Returned Meter Daily
    unique_id: 454B7731-375D-4C90-AFC0-42EAB23DF11D
    source: sensor.linky_energie_injectee
    always_available: true
    cycle: daily
  # Inverters Energy meter
  # !! TODO !! set your OpenDTU YieldTotal sensor
  inverters_energy:
    name: Inverters Energy
    unique_id: 6E14EC86-0965-463E-BFBF-6008B61B56AF
    source: sensor.opendtu_ff4930_yield_total
    always_available: true
  # Inverters Energy Meter Daily
  # !! TODO !! set your OpenDTU YieldTotal sensor
  inverters_energy_meter_daily:
    name: Inverters Energy Meter Daily
    unique_id: 4C4D8D06-C9D2-4408-B21A-1274A6E0F041
    source: sensor.opendtu_ff4930_yield_total
    always_available: true
    cycle: daily
  # Home Consumed Energy Meter Daily: you daily home consumption
  home_consumed_energy_meter_daily:
    name: Home Consumed Energy Meter Daily
    unique_id: 41AAA458-7545-462F-8E78-FD1D037A8DBE
    source: sensor.home_consumed_energy
    always_available: true
    cycle: daily

# https://www.home-assistant.io/docs/automation/
automation:
  # Automatically propagate changes in power limit input number to inverters
  # !! TODO !! set your minimal production limit (minimalPowerLimit): this should be such that minimalPowerLimit * number of inverters == minimal home consumption
  - id: "0000000000038"
    alias: "Solar: Update Inverter Power Limit"
    trigger:
      - trigger: state
        entity_id:
          - input_number.inverters_power_limit
    condition: []
    action:
      - action: number.set_value
        data:
          value: >-
            {% set minimalPowerLimit = 100 %}
            {% set nominalPower = states('input_number.inverters_nominal_power')|int(minimalPowerLimit) %}
            {% set powerLimit = states('input_number.inverters_power_limit')|float(nominalPower) %}
            {{ powerLimit / nominalPower * 100.0 }}
        target:
          entity_id:
            - number.inverter_1410a01e2cdd_limit_nonpersistent_relative
            - number.inverter_1410a01ec916_limit_nonpersistent_relative
            - number.inverter_1410a01ed6ca_limit_nonpersistent_relative
            - number.inverter_1410a01ed5a9_limit_nonpersistent_relative
            - number.inverter_1410a01ed5f0_limit_nonpersistent_relative
            - number.inverter_1410a01f092d_limit_nonpersistent_relative
            - number.inverter_1410a01ed604_limit_nonpersistent_relative
            - number.inverter_1410a01f010c_limit_nonpersistent_relative

  # Runs at a frequent interval to update the inverters limit
  # !! TODO !! set your Grid Power sensor for `sensor.grid_power`
  # !! TODO !! update the list of entity IDs matching your inverters S/N: these sensors come from OpenDTU
  # !! TODO !! set your minimal production limit (minimalPowerLimit): this should be such that minimalPowerLimit * number of inverters == minimal home consumption
  - id: "0000000000039"
    alias: "Solar: Auto update power limits"
    trigger:
      - trigger: time_pattern
        minutes: /1
    condition:
      - condition: state
        entity_id: binary_sensor.opendtu_ff4930_status
        state: "on"
      - condition: numeric_state
        entity_id: sensor.inverters_producing_count
        above: 0
    action:
      - action: input_number.set_value
        data:
          value: >-
            {% set minimalPowerLimit = 100 %}
            {% set grid = states('sensor.grid_power')|float(0) %}
            {% set setpoint = states('input_number.inverters_excess_setpoint')|int(0) %}
            {% set nominalPower = states('input_number.inverters_nominal_power')|int(minimalPowerLimit) %}
            {% set powerLimit = states('input_number.inverters_power_limit')|float(nominalPower) %}
            {% set producing = states('sensor.inverters_producing_count')|int(0) %}
            {% set missedPower = (grid - setpoint) / producing if producing > 0 else nominalPower %}
            {{ [nominalPower, [minimalPowerLimit, powerLimit + missedPower|round(0, "ceil")]|max]|min }}
        target:
          entity_id:
            - input_number.inverters_power_limit

  # Update the setpoint depending on events
  # !! TODO !! set your events accordingly. For example, `binary_sensor.openevse_vehicle_connected` and `sensor.openevse_vehicle_battery_level` and `binary_sensor.openevse_vehicle_charge` are for my EV car charger. You might not need them.
  # !! TODO !! update the conditions: here, I need a special condition that sets the setpoint to -600 when my EV si connected so that it has enough excess to start charging. If you do not have an EV, then put -200 or -100 or 0.
  # The value of -5500 is because with single phase in France you cannot divert to the grid more than 6kVA. So this is a safety value in case your home is consuming less, the script will reduce the soalr production ot make sure it does not feed teh grid with more than 5.5kW.
  - id: "0000000000041"
    alias: "Solar: Auto update Setpoint"
    triggers:
      - trigger: state
        entity_id:
          - binary_sensor.3erl_bridage_demande
          - binary_sensor.openevse_vehicle_connected
          - sensor.openevse_vehicle_battery_level
          - binary_sensor.openevse_vehicle_charge
      - trigger: homeassistant
        event: start
    conditions: []
    actions:
      - if:
          - condition: state
            entity_id: binary_sensor.3erl_bridage_demande
            state: "on"
        then:
          - if:
              - condition: state
                entity_id: binary_sensor.openevse_vehicle_connected
                state: "on"
              - condition: numeric_state
                entity_id: sensor.openevse_vehicle_battery_level
                below: 100
            then:
              - action: input_number.set_value
                metadata: {}
                data:
                  value: -600
                target:
                  entity_id: input_number.inverters_excess_setpoint
            else:
              - action: input_number.set_value
                metadata: {}
                data:
                  value: -200
                target:
                  entity_id: input_number.inverters_excess_setpoint
      - if:
          - condition: state
            entity_id: binary_sensor.3erl_bridage_demande
            state: "off"
        then:
          - action: input_number.set_value
            metadata: {}
            data:
              value: -5500
            target:
              entity_id: input_number.inverters_excess_setpoint

  # Notification in case a high grid volatge is detected
  # This is optional and require you to know how to setup HA notifications.
  - id: "0000000000042"
    alias: "Solar: Notify of high grid voltage"
    trigger:
      - trigger: numeric_state
        entity_id:
          - sensor.grid_voltage
        above: 250
    action:
      - action: notify.whatsapp_mathieu
        data:
          message: "[GRID] High Voltage (> 250V)"
      - delay:
          hours: 0
          minutes: 1
          seconds: 0
          milliseconds: 0
    mode: single
    max_exceeded: silent

  # Notification in case the number of inverters producing changes.
  # This helps detect inverters which are dropping because if grid high voltage for example.
  # This is optional and require you to know how to setup HA notifications.
  - id: "0000000000043"
    alias: "Solar: Notify of inverter producing count"
    trigger:
      - trigger: state
        entity_id:
          - sensor.inverters_producing_count
        to: null
    action:
      - action: notify.whatsapp_mathieu
        data:
          message: "[SOLAR] Inverters producing: {{ states('sensor.inverters_producing_count')|int(0) }}"
    mode: single
    max_exceeded: silent

  # Notification in case 3ERL changes its zero-inject order
  # This is optional and require you to know how to setup HA notifications.
  - id: "0000000000040"
    alias: "Solar: Notify 3RL State Change"
    triggers:
      - trigger: state
        entity_id:
          - binary_sensor.3erl_bridage_demande
        to: "on"
      - trigger: state
        entity_id:
          - binary_sensor.3erl_bridage_demande
        from: "on"
        to: "off"
      - trigger: homeassistant
        event: start
    conditions: []
    actions:
      - if:
          - condition: state
            entity_id: binary_sensor.3erl_bridage_demande
            state: "on"
        then:
          - action: notify.whatsapp_mathieu
            data:
              message: "[SOLAR] 3RL Bridage: ON"
      - if:
          - condition: state
            entity_id: binary_sensor.3erl_bridage_demande
            state: "off"
        then:
          - action: notify.whatsapp_mathieu
            data:
              message: "[SOLAR] 3RL Bridage: OFF"

view.yaml

type: sections
max_columns: 3
title: Solaire
path: solar
icon: mdi:solar-panel-large
sections:
  - type: grid
    cards:
      - type: custom:power-flow-card-plus
        entities:
          grid:
            entity: sensor.grid_power
            display_state: one_way
            secondary_info:
              entity: sensor.grid_voltage
              unit_of_measurement: V
              display_zero: true
              color_value: false
              decimals: 1
            use_metadata: false
            color_value: false
            color_icon: true
          solar:
            entity: sensor.solar_production_power
            display_zero_state: true
            color_value: false
            color_icon: true
            secondary_info:
              entity: sensor.max_inverter_voltage
              unit_of_measurement: V
              display_zero: true
              color_value: false
              decimals: 1
          home:
            entity: sensor.home_consumed_power
            color_value: false
            color_icon: true
            secondary_info: {}
          individual:
            - entity: sensor.openevse_power
              display_zero: true
              icon: mdi:car-electric
              name: OpenEVSE
              color_value: false
              color_icon: true
              secondary_info:
                entity: sensor.renault_zoe_battery_level
                unit_of_measurement: "%"
                display_zero: true
                unit_white_space: true
              display_zero_state: true
              unit_white_space: true
            - entity: sensor.chauffe_eau_power
              display_zero: true
              color_value: false
              color_icon: true
              secondary_info: {}
              name: Chauffe-eau
              icon: mdi:water-boiler
              calculate_flow_rate: false
              display_zero_state: true
              unit_white_space: true
            - entity: sensor.total_deshumidificateur_power
              display_zero: true
              color_value: false
              color_icon: true
              secondary_info: {}
              name: Déshumidificateurs
              icon: mdi:air-filter
              display_zero_state: true
              calculate_flow_rate: false
              unit_white_space: true
            - entity: sensor.total_pac_power
              display_zero: true
              color_value: false
              color_icon: true
              secondary_info: {}
              name: PAC
              icon: mdi:air-conditioner
              display_zero_state: true
              unit_white_space: true
        clickable_entities: true
        display_zero_lines:
          mode: show
          transparency: 50
          grey_color:
            - 189
            - 189
            - 189
        use_new_flow_rate_model: true
        max_expected_power: 12000
        watt_threshold: 12000
        kw_decimals: 2
        min_flow_rate: 0.5
        max_flow_rate: 3
      - type: entities
        entities:
          - type: custom:entity-progress-card
            entity: sensor.inverter_1410a01e2cdd_power
            decimal: 0
            min_value: 0
            max_value: 1000
            name: "#1: 1410A01E2CDD"
            hold_action:
              action: more-info
            tap_action:
              action: perform-action
              perform_action: button.press
              target:
                entity_id: button.inverter_1410a01e2cdd_restart_inverter
            layout: horizontal
            force_circular_background: true
            bar_size: medium
            icon: mdi:restart
            theme: optimal_when_high
            grid_options:
              columns: 12
              rows: 1
          - type: custom:entity-progress-card
            entity: sensor.inverter_1410a01ec916_power
            decimal: 0
            min_value: 0
            max_value: 1000
            name: "#2: 1410A01EC916"
            hold_action:
              action: more-info
            tap_action:
              action: perform-action
              perform_action: button.press
              target:
                entity_id: button.inverter_1410a01ec916_restart_inverter
            layout: horizontal
            force_circular_background: true
            bar_size: medium
            icon: mdi:restart
            theme: optimal_when_high
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  - user: 8b29665394c74237a7759b784fc5232e

Hello,

thanks for the job done! It is exactly what I need as to day I inject too much power on the grid for free and looked up to 3ERL but was wondering how to block my inverters to avoid injecting on negative hours...

The issue is that I have Deye micro inverters so I can't use openDTU but I would be able still to integrate them with Solarman integration.
And I have Anker sensor as well integrated on HA not Shelly.

Do you think it would be complicated to use your integration and adapt?

I am not so familiar with HA but can work on it...

thanks in advance

Do you think it would be complicated to use your integration and adapt?

The first thing you need to check is:

1. Can you set some power limits on your Deye inverters through an API ?
2. Can you get your inverter settings (produced power, applied limit, total energy, temperature, etc) from an API ?
3. If yes, are you able to you call these API from HA ?

If you can do all three, then you are able to setup sensors nearly the same way it is done for the 3ERL and PRE calls and be able to control your inverters from HA.

There seem to be an HA integration for Deye: https://kellerza.github.io/sunsynk/guide/tested-inverters

If that works, it is probably the easiest option since you could just replace OpenDTU sensors by yours.

I am not so familiar with HA but can work on it...

The only complex things is to wire Deye and replace OpenDTU sensors by yours. The remaining logic stays the same. This is complex though and you'll need to ramp up probably your HA knowledge on how to wire that.

Start small, add stuff step by step.

It took me 6 months to refine this integration up to where it is now. I started in March or May this year and revised it often. So don't think big first, just try to first read your inverter data from HA, then try control them, etc etc.

Updates:

• improved PID reaction
• switch from sensor to input number (user can change the limit)
• decrease update delay to 30 sec
• avoids sending an update to opendtu if limit did not change

Bonjour et Merci pour le partage.

Je m'intéresse également à automatiser le bridage de MO Hoymiles. Cepedant, j'ai une crainte concernant l'écriture du paramétre "Power Limitation" qui serait fait en EEPROM dans les MO mais qui n'est pas forcément endurante à des écritures réguiléres. Voir le message d'avertissement : suaveolent/hoymiles-wifi

Quel est ton avis sur ce point ?

Quel est ton avis sur ce point ?

L'intégration utilise le paramètre non persistent. Voir le code.

par contre certaines version du firmware hoymiles ont un bug et mettent les limites persistantes. Il faut voir avec le support pour une MAJ.