High voltage hybrid inverter (GW6000-EH) with EV battery (Chevy Volt)

[powertrack]

Have here a protocol from a BYD HVM 22,1kWh batterie, connected on a Fronius Symo Gen24 10kW
Goodwe is able to handle (after an firmware update) a BYD HVM.
Data read with BYD BeConnect Plus

 

[prepared1]

Yasko: Glad to hear that it is working out. We happen to have a very large, regional company here that recycles all sorts of industrial storage systems, so it is an easy task to pick up a super heavy duty rack, cabinet, or what-ever, and for a good price. You just need patience, and then jump at the chance when you get it.

Keep at it!

 

[yasko]

@powertrack
The inverter came with its own Modbus power meter and all accessories needed for installation. That is a standard option from Goodwe, and I ordered by this way. When the inverter works in "General mode", it tries to maximize a self-consumption and keep zero feed-in.


The inverter also has an RS-485 (MODBUS RTU ) interface, and it's possible to implement complex control scenarios beyond the scope of the included app. I've found useful information here. This source code is a part of the openems.io project.

Thanks for the attached log from the BYD battery. I've checked my inverter version, and it supports the BYD HVM battery. But my communication interface is CAN-bus based, and Fronius uses MODBUS interface, so there is a big difference. I will check the data and see how to interpret them.

 

[Simon2021]

Have here a protocol from a BYD HVM 22,1kWh batterie, connected on a Fronius Symo Gen24 10kW
Goodwe is able to handle (after an firmware update) a BYD HVM.
Data read with BYD BeConnect Plus

Do you know how to read the values? So what they mean? I guess the maximum voltage, SOC, maximum current is transferred here, probably encoded by IEEE754 Single precision 32-bit or 64 bit

 

[yasko]

I've checked the data in the attached file, and it looks like a log file for debugging purposes. Real-time communication between the battery and the inverter can be quite different. The inverter datasheet states that it's MODBUS-based. If we have the actual log from the RS-485 bus, we can compare the data with the protocol between the Kostal inverter and the BYD battery.