Growatt RS485 BMS Adapter

[Bernhard-Private]

Hello Torsten,
great work, I'm really impressed by this project.

I want to connect a BMS Growatt APX 5.0-30.0P-S2 High Voltage Battery System to a
Inverter INVT BD10 KTR-RH3(E) with a raspberry Pi4 with a waveshare RS485_CAN_HAT.

I have aready checked the connection from the bms-to-inverter to the INVT Inverter via CAN:

1. NULL-BMS Configurion Pylon-Can and Battery Simulation

2. NULL-BMS Configurion Pylon-hv-Can and Battery Simulation

The communication with the Pylon-Can configuration seems to be working.

The Growatt BMS has an RS485 interface.
The ‘bms-to-inverter’ project does not include a BMS adapter
for Growatt RS485. There is, however, an adapter for Growatt RS485
inverters, but it is not selectable.

I would suggest that the Growatt RS485 BMS and the Growatt RS485 inverter use the same protocol.

Can you help me with the implementation of a Growatt RS485 BMS adapter?

Regards

Bernhard

[ai-republic]

I'm not sure that the protocol works the same but we can give it a try. I will be away for a week but then I will try to find time for this. If you find the specific BMS protocol somewhere please attach it here.

[Bernhard-Private]

ChatGpt.html

Hello Torsten,
I Have had a talk with Chatgpt. It offers some interesting hints, also
for the wakeup handling. I offer a little summary of the Chat. Unfortunately, I don't have any official documentation for the BMS Growatt APX 5.0-30.0P-S2. I'll have to do a little research.

Regards
Bernhard