Support for Growatt MOD series(RS485)

[Star442]

Hi,

Is there any plan of supporting growatt MOD series? It's RS485 based

[ai-republic]

Hi,If you could provide the RS485 communication specification then I can surely support it :} On 11/7/24, 21:09 Selver @.***> wrote:

Hi, Is there any plan of supporting growatt MOD series? It's RS485 based —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you are subscribed to this thread.Message ID: @.***>

[Star442]

MOD TL3-XH: 03 register range：0~124,3000~3124；04 registerrange：3000~3124,3125~3249

https://github.com/wills106/homeassistant-solax-modbus/files/14230118/Growatt-Inverter-Modbus-RTU-Protocol_II-V1_24-English.pdf

This should be it

[ai-republic]

Great thanks for the inverter protocol specification! Which BMS will you be using? I will try to start implementing it next weekend as I'm quite busy at the moment.

[Star442]

I have not decided yet, but most likely pylontech or trying to use my nissan leaf via chademo! Thanks no worries, is it possible to support your work somehow?

[ai-republic]

Ok, I would recommend using the Pylontech protocol as its a very widespread commonly used protocol by many BMSes and inverters. If you like to support this project I'd be very happy! Just click on the Sponsor link on the project page! :)

[Star442]

Ok, I would recommend using the Pylontech protocol as its a very widespread commonly used protocol by many BMSes and inverters. If you like to support this project I'd be very happy! Just click on the Sponsor link on the project page! :)

Perfect thanks!

Did you have any luck with the RS484 integreation for Growatt?

[ai-republic]

I will try to finish it this weekend :)

[Star442]

@ai-republic still no luck?

[ai-republic]

Hi, I got around to start the implementation but I was very busy last week (also my sons birthday and an upgrade of my solar system). I think I can finish it this weekend though :)

[ai-republic]

@Star442 the Pylon RS485 binding is now implemented. Please get the new Configurator , choose _PYLONRS485 in the inverter tab and do a Clean install. Please also configure the debug log-level so that I can check if there are any prolems. Happy testing ;)

[Star442]

@Star442 the Pylon RS485 binding is now implemented. Please get the new Configurator , choose _PYLONRS485 in the inverter tab and do a Clean install. Please also configure the debug log-level so that I can check if there are any prolems. Happy testing ;)

Thanks @ai-republic ! I'm just trying it out, is there any function to use a fake battery? Just to see if the communication with the inverter is working?

[ai-republic]

No, there is only a dummy inverter, but no dummy battery. But that's a good idea - I will implement that in the next few days :)

[Star442]

@ai-republic Perfect, thanks!

[Star442]

@ai-republic did you have any time to implement the dummy battery?

[ai-republic]

I've created a plugin architecture and a plugin that has some preset (dummy) battery data but currently only for 48V systems that is currently only configured for the SMA. I'd like to create an extra tab on the Configurator app where available plugins can be configured. Need to see when I get around to implementing that. Hopefully next weekend 😃

[ai-republic]

@Star442 I did add the dummy (NONE) BMS now. Also I added plugin support. So if you like to used the dummy BMS you can do so by configuring that on the BMS tab of the latest Configurator application. Then also choose the inverter plugin SimulatedBatteryPackPlugin. Please be careful when using this, as it will not report any errors to the inverter and the inverter will try to start charging/discharging without any battery attached !!!! So you MUST (!!!!!!!!!!) disconnect any load and PV DC input to prevent possible damage!!!

[ai-republic]

@Star442 were you able to test the dummy (NONE) battery with the SimulatedBatteryPackPlugin inverter plugin?

[romanbetwo]

I am curretnly testing on growatt MOD 10ktl. Since I am on windows machine, I am not sure if its okay, So I see 2 BMS's both showing 0 values, I did preconfig the fake battery values, all my DC on inverter is off :) but on "Server" side of growatt I dont see any info about the battery.

using one RS485 usb converter with pylon_RS485 inverter preset, invertor try to communicate (i can see the RX Led activity) I also see TX led active when program send modbus data.

[ai-republic]

Windows should be fine if you don't use CAN. And then you choose _PYLONRS485 inverter binding and the SimulatedBatteryPackPlugin?

[romanbetwo]

Hi ,yep settings were correct, but inverter did not show any data about the battery.

Today I am going to try with SPH10000.

I will run it on Pi Connect all together and I will post full info with simulated batt pack.

[ai-republic]

@Star442 I implemented the _GROWATTMODBUS inverter binding now. Could you give it a try and attach the log file here please?

[romanbetwo]

Hi, so SPH10000 has CAN battery. Ill finish my coffee and send you log.

[romanbetwo]

Okay, I am unable to run remote desktop for some reason here is screenshot 😑

[ai-republic]

Hmm, I'll have to look into that as it really doesn't send a valid frame

[romanbetwo]

Torsten, just reminder my current setup is with SPH10000. I am using growatt_can Waveshare canusb Pi4

[ai-republic]

ok, could you please download the latest Configurator application and test this again. The SimulatedBatteryPackPlugin should work now. FYI: I separated the log files now for BMS-to-Inverter, webserver and MQTT. Please let me know how it goes and also attach the bmstoinverter.log, Thanks 😄

[ai-republic]

@romanbetwo did you get a chance to test the fix? Any updates?

[romanbetwo]

Hi Torsten, not yet. Next week I will access the MOD. I will update the status for sure.

But the good news is that SPH seems to communicate.