GoodWe grid export limit

Energy
1

I have a GoodWe inverter and added the integration to HA. One of the options is Grid Export Limit. It works because when i set it to 0 my panels are going to 0. But what i would like to achieve is that when my house is using 500w my panels are limited to a number around 500w, so no export to grid. Is there a way to build this in HA?

2

This is combination of parameters I am using to achieve zero grid export while maintaining production to cover momentary consumption of the house

    - action: number.set_value
      data:
        value: "0"
      target:
        entity_id: number.goodwe_eco_mode_power
    - action: number.set_value
      data:
        value: "0"
      target:
        entity_id: number.goodwe_depth_of_discharge_on_grid
    - action: select.select_option
      data:
        option: eco_discharge
      target:
        entity_id: select.goodwe_inverter_operation_mode
3

Thanks for the reaction. In my case I don’t have any battery etc. Just an GoodWe inverter with Grid Export limit. Thus if my export is below zero I would like to set the inverter to eg 100, so the phase on which the inverter is connected could be using 500 W but together it’s still negative because of the other inverter. When the house needs power and current use is above 0 the GoodWe must go to 10000 to avoid this. Can I achieve that with your yaml code?

4

I suggest adding all control entities in frontend dasjboard and experimenting with these until you have found a combination which suits your requirements.
I checked my configuratiot and I found I do not use number.goodwe_grid_export_limit and it is always set to the allowed max.
Just to be sure I use custom integration " GoodWe Inverter" ver 0.9.9.27.

5

I indeed use the limit grid export function but not very stable. This morning I wasn’t able to use my goodwe app and the most likely issue is that i forced the grid limit on 10000 which ruined my wifi connection. Sounds strange but normally it is unavailable when it’s dark. I will take a look to see if the custom integration is working for me

6

What do you use for stopping to grid? I am thinking about buying two clamps, for phase 1 and 2 and control it with HA

7

For zero export feature it is essential to have Goodwe smart meter installed at grid connection point. Do you have it?

8

No I have a YouLess connected to my p1 port on the meter and all consumption from my inverters is in a kWh phase meter, connected to the s0 off the YouLess.
At this moment I have created two automations which are looking at the pv power and if it is above value A the the grid limit is set to 0, it it below value B it is set to 10000. I have to play with it to get it work in the way it’s supported and stable

9

By a quick look at youless it seems it can provide momentary power consumption data with seconds resolution, so yes, you should be able to build automations on that.
However I would recomment installing Goodwe smart meter as it is cost effective and integrates smooth with inverter control logic.
As a bonus you avoid dependance on external control loop in Homeassistant, which adds complexity and can be a point of failure.
Feel free to PM me if you need extra help.

10

Thanks for your reply. I understand your suggestion about the GoodWe smart meter but I have a kWh installed because I have 2 inverters. That is connected to my YouLess on S0. So with that I see my current power use and that’s my trigger for the return to grid option in the GoodWe. I have an automation which checks if current use is above 0 and sets return export grit to 10000, 1 automation below 0 which sets return to grid to 0. That with 2 automations to start and stop the grid return and it seems all functioning.

11

My other converter is from Solax and year 2018. The only way to achieve that is using a Solax X1 NFI meter which is already a few years out of the market. But I found one online and with the help from solax maybe I can get that also working and than I can control both inverters and minimize return to grid