Disable or limit inverter feed to grid

[anoppe]

With the utility providers trying to oppose more and more measures to let the PV-panel owners pay for feeding produced energy to the grid, I was wondering if it is possible to use Grott to configure the inverter to limit feed or stop completely.
It would be nice if I could configure automation in HASS which instructs Grott to limit feed or turn off the inverter.

[ebbz]

I found out it is possible to disable the inverter by using grottserver. You will find some info in this thread

After setting up grott and grottserver. You are able to send register commands to your inverter. My inverter, and I think most of the inverters out there, user register 3 to set an export limit. You can set this to any value between 0 and 100 to limit your export percentage.

I have made some rest_commands calling grottserver in home assistant to start and stop exporting via automations based on the energy price.

[anoppe]

I've enabled the export limit using the official Growatt UI, and then I was able to change these registers (3 and 4). However, as soon as I enabled the export limit, the inverter stopped exporting completely, despite setting the value to 0, or 100. Tried both, to be sure...

[PedroKTFC]

This is what I use for my registers list. Seems pretty accurate in my experience.

[anoppe]

thanks @PedroKTFC .
I see that the MIN types don't have their registers specified yet.
Any Idea what 03 and 04 register range should mean:

TL-X/TL-XH/TL-XH US (MIN Type):
03 register range: 0-124, 3000-3124, 3125-3249 (TL-XHUS)
04 register range: 3000-3124, 3125-3249, 3250-3374 (TL-XH)

[ebbz]

Add this to to your configuration.yaml in home assitant

rest_command:
  turn_off_solar:
    url: "http://{ipgrowattserver}:5782/inverter?inverter={inverterid}&command=register&register=03&value=0"
    method: put
  turn_on_solar:
    url: "http://{ipgrowattserver}:5782/inverter?inverter={inverterid}&command=register&register=03&value=100"
    method: put

The automation i am using to turn off the inverter:

alias: DisableInverter
description: ""
trigger:
  - platform: state
    entity_id:
      - sensor.electricity_price_xxx
action:
  - if:
      - alias: If negative energy price
        condition: numeric_state
        entity_id: sensor.electricity_price_xxx
        below: 0
    then:
      - alias: Disable inverter
        service: rest_command.turn_off_solar
        data: {}
    else:
      - alias: Enable inverter
        service: rest_command.turn_on_solar
        data: {}
mode: single

[ebbz]

As for the registers. I have used the document mentioned by @anoppe
I am using an MIC 3000TL-X inverter

[PedroKTFC]

Where did you read about register 3? For my SPH inverter the register that defines the export rate is 1070 although that probably only works when you set it to Grid first (I haven't tried stopping exports as I get paid in the UK for whatever I export).

[Tampa]

Facing a similar question. I have a battery that I'd like to fill first before starting any export to grid. So I need to fetch the battery state of charge and after 90% set export limit enable and disable when it drops below 90% again. It's strange that the official UI doesn't allow setting this up. Even in Load first mode it will happily export from the battery and drain it despite there still being load. Supposedly a Idle/Charge mode exists when digging into the hidden UI elements, but it's not documented anywhere what exactly that does.

[PedroKTFC]

I do much of this through Home Assistant and control the registers as necessary.

[Tampa]

I have been trying to poke at that through the server-api and openapi endpoints, but those either don't work or don't return the data I need unfortunately. That led me here, but I am not sure I can setup Grott in proxy mode as I have not found the part in the stick to change the server address.

[anoppe]

Are you using the wifi-dongle? You can do this on the web interface of server.growatt.com via the datalogger settings form:

[Tampa]

Doesn't have to sit in the same network right? It could also be an IP of an external server that runs Grott? (Cause I have it sitting on its own router behind the modem and no way to put a server into that network at the moment) I'm still reading into documentation trying to work out how to install Grott and configure it correctly :)

[anoppe]

I do g know why, but it worked somehow today. Thanks for the pointers so far!Op 15 mei 2024 om 11:01 heeft Richard Ebbers ***@***.***> het volgende geschreven: Add this to to your configuration.yaml in home assitant rest_command: turn_off_solar: url: "http://{ipgrowattserver}:5782/inverter?inverter={inverterid}&command=register&register=03&value=0" method: put turn_on_solar: url: "http://{ipgrowattserver}:5782/inverter?inverter={inverterid}&command=register&register=03&value=100" method: put The automation i am using to turn off the inverter: alias: DisableInverter description: "" trigger: - platform: state entity_id: - sensor.electricity_price_xxx action: - if: - alias: If negative energy price condition: numeric_state entity_id: sensor.electricity_price_xxx below: 0 then: - alias: Disable inverter service: rest_command.turn_off_solar data: {} else: - alias: Enable inverter service: rest_command.turn_on_solar data: {} mode: single —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>