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littleyoda / ha-pysmaplus

home assistant custom integration for pysma-plus
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Able to change settings #5

Open KimCarlsen opened 2 weeks ago

KimCarlsen commented 2 weeks ago

hi

I was wondering if it is possible to alter the device settings in the inverter? It would be nice to alter the feed-in settings, to be able to limit export, when prices goes negative. Like this https://my.sma-service.com/s/article/Tech-Tip-How-to-Setup-Zero-Export-with-only-an-SMA-Energy-Meter?language=en_US

littleyoda commented 2 weeks ago

To be on the safe side: You like to temporarily achieve the effect of Zero Export (https://files.sma.de/downloads/ZeroFeedIn-PL-en-11.pdf)?

First of all: I am happy to help provide the "tool", but other people have to test it. As I receive a fixed price per kWh, a zero export is counterproductive for me. That's why I don't know enough about which way is the most promising in the end.

There are several options for regulation/control: Modbus via inverter Modbus via Sunny Home Manager 2 Setting via the local website of the inverter Setting in the Sunny Home Portal (as described in the file above)

The topic is not easy at the moment. With the latest changes to the SHM2 firmware, the settings in the inverter are partially overwritten by the SHM2, so that you have to control the SHM2 via Modbus. This solution probably regulates with greater latencies. You also need a personalised Grid Guard code from SMA.

Irrespective of this, I have built in an option to adjust the power limit for the enneox-based systems. This is technically the same way as when you enter the value on the inverter's website. @frederikvoGIT // https://github.com/littleyoda/ha-pysmaplus/issues/2 tested this method in practice and had massive problems with the inverter no longer accepting the changed values.

I could build in similar support for webconnect, but for this I need the support of someone with a webconnect device and some technical understanding. (Linux system and knowledge would be great)

KimCarlsen commented 2 weeks ago

Yes exactly. My prices are calculated by the hour, based on prices on the nord pool trading exchange. where i get the day ahead prices nordpool and they are from time to time negative. So idea is to activate, automatically from HA, zero export when the prices are below 0. I have a SMA STP 8.0 with an energy meter connected, currently connected with Webconnect. (using pysmaplus). I'm gladly help in testing, but i'm not a linux or coding guy.

cryptedx commented 2 weeks ago

You could also check if your inverter has digital I/O and connect a potential free device to it so you can set it to zero but this would be an extra hardware to be installed of course.

KimCarlsen commented 2 weeks ago

don't know if it possible, , but i've opened a supportticket at SMA

frederikvoGIT commented 2 weeks ago

Did some testing tonight, reprogrammed the automation and now got it working when i manualy triggered the automation. (don't know why it refuses to work via the normal automation)

One automation to start dynamicly limit: alias: Begrenzing PV description: "" trigger:

One automation to end the dynamic power limit: alias: Opheffen begrenzing PV description: "" trigger:

frederikvoGIT commented 2 weeks ago

Did some testing tonight, reprogrammed the automation and now got it working when i manualy triggered the automation. (don't know why it refuses to work via the normal automation)

One automation to start dynamicly limit: alias: Begrenzing PV description: "" trigger:

* type: power
  platform: device
  device_id: 2cdf0157cb62ace72eaddbb0d372f7d1
  entity_id: cb54a21d6efd8b1371ac880bb07d9b0d
  domain: sensor
  above: 0
  condition:

* condition: numeric_state
  entity_id: sensor.nordpool_kwh_be_eur_3_10_021
  below: 0
  action:

* service: pysmaplus.set_value
  metadata: {}
  data:
  entity_id: sensor.sunny_boy_smart_energy_5_0_inverter_power_limit
  value: "{{states("sensor.grenswaarde_omvormer")}}"
  mode: restart

One automation to end the dynamic power limit: alias: Opheffen begrenzing PV description: "" trigger:

* type: power
  platform: device
  device_id: 2cdf0157cb62ace72eaddbb0d372f7d1
  entity_id: cb54a21d6efd8b1371ac880bb07d9b0d
  domain: sensor
  above: 0
  condition:

* condition: numeric_state
  entity_id: sensor.nordpool_kwh_be_eur_3_10_021
  above: 0
  action:

* service: pysmaplus.set_value
  metadata: {}
  data:
  entity_id: sensor.sunny_boy_smart_energy_5_0_inverter_power_limit
  value: 4997
  mode: restart

Think i found it (attribute was not assigned). Needs to test it tomorrow.

frederikvoGIT commented 2 weeks ago

Found it and got everything working on my Sunny Boy Smart Energy 5.0, with following automation:

KimCarlsen commented 2 weeks ago

wow, that was fast :-) thanks a lot. I'll try it out and waiting for negative prices to see how it flows. tomorrow is all above 0

littleyoda commented 2 weeks ago

On remark: frederikvoGIT Solution works only with a "enneox-OS" based Inverter.

Another solution using modbus: https://community.home-assistant.io/t/modbus-data-from-sma-inverter/122425/314?u=swante

frederikvoGIT commented 2 weeks ago

Yeah, i did the test with temporarily setting the limit on 0,2€/kWh. 😉

And now indeed very high prices tomorrow. Let's hope for negative prices next weekend again.

KimCarlsen commented 2 weeks ago

so it does not work with an STP inverter?

littleyoda commented 2 weeks ago

so it does not work with an STP inverter?

correct. But you can try the modbus solution.

KimCarlsen commented 2 weeks ago

damn. Modbus might be doable, but not as easy. Then i suggest remove the services i HA, if the connection method doesn't allow it. Otherwise i bet there will be more issues on this.

frederikvoGIT commented 2 weeks ago

damn. Modbus might be doable, but not as easy. Then i suggest remove the services i HA, if the connection method doesn't allow it. Otherwise i bet there will be more issues on this.

But @littleyoda please keep the services for the SB SE-series.🙏

littleyoda commented 2 weeks ago

Removing the Service does not make sense at all. Just because it's not supported on a device doesn't mean I'm going to remove it completely.

Before you use the service call "set parameter", you should first use the service call "get values range" to determine whether you can change the sensor. However, I have just realized that the error message from "get value range" is not particularly informative. I'll have to change it.

The topic is also documented: https://github.com/littleyoda/ha-pysmaplus/blob/main/docs/set_parameter.md

I am already working on supporting the SHM2 via Modbus. This can be only used, if you have a Grid Guard code from SMA. This is particularly relevant for people who still want to have battery control after the changes to the firmware.

I may integrate Modbus support for other devices for control issues. I don't know yet if and when something will come, as I'm still working on the SEMP (Simple Energy Management Protocol) and I would like to finalise it.

I'm not sure right now whether a non-modbus control system for webconnect devices makes any sense at all. Perhaps someone can tell me whether there are relevant parameters that can be controlled via the web interface but not via modbus.

I would also appreciate information on which Modbus addresses are relevant at all.

KimCarlsen commented 1 week ago

I wasn't saying to remove it completely, but perhaps disable it, if a connection method that don't support it is chosen. Let me know if i can help with testing webconnect. I will try with modbus when there is time for it.

frederikvoGIT commented 1 week ago

@littleyoda FYI, by the end of this year i might extend my installation with a small battery on my SB SE 5.0, wich i only want to charge and discharge at 10A (480W) maximum. But to my surprise i see that the parameters "Battery Batt. manuf's max. charge capac." and "Batt. manuf's max. disch. capac." are not editable in the Ennexos Sunnyportal. Am i missing something?

afbeelding

frederikvoGIT commented 1 week ago

@littleyoda FYI, by the end of this year i might extend my installation with a small battery on my SB SE 5.0, wich i only want to charge and discharge at 10A (480W) maximum. But to my surprise i see that the parameters "Battery Batt. manuf's max. charge capac." and "Batt. manuf's max. disch. capac." are not editable in the Ennexos Sunnyportal. Am i missing something?

afbeelding

Kind reminder.

cryptedx commented 1 week ago

@frederikvoGIT @littleyoda is doing this in his spare time for free. Such comments do net help. I am sure @littleyoda has not forgot it, he just did not have time to look after it.

frederikvoGIT commented 1 week ago

@frederikvoGIT @littleyoda is doing this in his spare time for free. Such comments do net help. I am sure @littleyoda has not forgot it, he just did not have time to look after it.

I had a good month ago conversations on almost a daily base (sometimes on hourly base). But you are right, he could be occupied at the moment.

I apologise to @littleyoda .

littleyoda commented 1 week ago

My understanding is that this value specifies the maximum and not the " preferred" charging/discharging speed.

Since you do not have a battery connected, it may well be that the relevant settings for this topic are missing.

Until someone reports the diagnostic information from a Sunny Boy Storage with connected batteries, I can't say anything.

frederikvoGIT commented 1 week ago

My understanding is that this value specifies the maximum and not the " preferred" charging/discharging speed.

Since you do not have a battery connected, it may well be that the relevant settings for this topic are missing.

Until someone reports the diagnostic information from a Sunny Boy Storage with connected batteries, I can't say anything.

Ah ok, thanks.

I'll look for a temporarily batterie.