ECU-R (2162) Zero Export via Home Assistant

[Cevendir]

I see conflicting reports about Zero Export working in Home assitant with the ECU-R 2162 model. I see in @HAEdwin his documentation under Feature Comparison it stated as NOT working. But in Article on Doe Duurzaam https://doe-duurzaam.nl/artikel/je-apsystems-micro-omvormers-slim-uitzetten-via-web-of-home-assistant/ I see a Reply from @HAEdwin, that it is working. What is true in this case :-)

[HAEdwin]

Hi @Cevendir
For zero export, the ECU needs to know how much power is being drawn from the grid. The ECU-C is the only device with CT clamps to measure this. However, you can still achieve the same result with a P1 meter sensor and the max power entity (when you own a 2162). However, never expect a flat line at zero Watts. The inverters need time to adjust, which is a gradual process. Ultimately, you'll save on feed-in costs if you've implemented this automation via HA. The "Doe Duurzaam" page = "De Groene Nerds" don't always have the information in order, not even on the podcasts and that's a shame but unsurmountable with all the different hardware.

[Cevendir]

Hi @HAEdwin,

Thanks for the reply!

I have a setup in HA with dsmr so am i correct that i don't need any other hardware then the ecu-r?

I don't expect a flatline! If i can prevent around 75% of my export that would be perfect!

No bad words for the doe duurzaam guys. Have been listening to their potcast for a while now. Really enjoy them and the doe duurzaam guides are extremely helpfull in pointing in the right direction!

[HAEdwin]

Yes yes but I don't watch them too much 😄

[HAEdwin]

I have added an automation script which you should be able to modify (entities), copy and simply paste on the automation page. You can find it in the Wiki.