Reviving an undercharged BYD 11kWh pack

[Dala]

That is exactly what I'm about to find out @netforceatg ! Will soon have a new video up on the project!

 

[Dala]

Status update, we are getting closer:

View: https://www.youtube.com/watch?v=64wVE4mU1_4


Still having issues, the solar inverter doesn't detect the battery, the battery just blinks the EC111 error code. Ideas?

 

[yasko]

Nice project! I hope the battery will start work with the inverter.
Did you check the firmware compatibility between the inverter and the battery?
I have some experience hacking CAN bus battery interfaces, but this is probably MODBUS RTU. I am curious whether the battery or inverter is the master device? If you have some bus logs, we can discuss them here.
I will follow up with interest the repository about the reverse engineering process. I'm running an inverter with a custom HV battery and planning to update my BMS solution. So I will be happy to see how the BYD battery is made .

 

[Dala]

It finally works !

View: https://youtu.be/onuJrsD6vb0


Now I need good tips on passive modbus RTU sniffing...

 

[Dala]

The project continues:

View: https://youtu.be/FJS_dHHOH8I

 

[ivanM]

The project continues:

View: https://youtu.be/FJS_dHHOH8I

Hi, any progress on the project pls? I seem to be trying to find similar solution with my Gen24 10kw Fronius... I am able to put together many times the size of byd battery for much lower price. Question is, what BMS to use or how to fool the inverter to make it talk to the DIY battery pack...

 

[Dala]

Hi, any progress on the project pls? I seem to be trying to find similar solution with my Gen24 10kw Fronius... I am able to put together many times the size of byd battery for much lower price. Question is, what BMS to use or how to fool the inverter to make it talk to the DIY battery pack...

I have all the collected log files here: https://github.com/dalathegreat/byd_battery just haven't had time to prioritize this project

 

[Dala]

Great progress on the Gen24BYD reverse engineering, we now have Tesla Model 3 packs hooked up to the Gen24 natively!

View: https://www.youtube.com/watch?v=-s7lODLDOiQ

 

[bbbbrass]

Great progress on the Gen24BYD reverse engineering, we now have Tesla Model 3 packs hooked up to the Gen24 natively!

View: https://www.youtube.com/watch?v=-s7lODLDOiQ

You do great work!

 

[Dala]

Today I turned on a LEAF pack connected directly to the grid.

More info on the project here: https://github.com/dalathegreat/BYD-Battery-Emulator-For-Gen24

This is a gamechanger for how easy it is to re-use old LEAF packs as-is for stationary storage.