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Deye Hybrid 12k CAN communication with JK inverter BMS

zmm

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Joined
May 16, 2024
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14
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Slovenia
I continue to set up my system and I have further questions.
Thank you for all the help so far.
Now I got a bit stuck on the BMS communication.

This is the JK documentation:
1716142689767.png
It's messed up but I believe they ment to write CANL is on pin 4 and CANH on pin 5

This is what I could find on the DEYE CAN pinout:
1716142774380.png
Also pins 4 and 5.
I used a 1:1 ethernet cable.... but no sign of communication.
I left all default settings on Deye, Lithium mode 00
I tried Pylon and Deye setup on JK BMS.

Any ideas, anyone?
 
I noticed the Hi and Low pins are inversed, so I also tried crossing the 4 and 5 lines - with no success.

I also noticed that CAN connector on tha BMS is marked as the one closest to the DRY contacts.
But if I measure the resistance on CAN line, I only get 120OHM on the RS485 connector ??? This is really messy. If anyone is using JK-BMS, please tell me on witch connector and on witch pins :)
 
Did you set the protocol 0 and canbus as an option in the deye ?
Can't tell you much about the jk settings, but above is for the pylontech protocol
 
The JK Deye canbus worked with my SMA SI5048, as you have sorted out the 4 and 5 pins it should work. Also try the pylontech, Goodwe and fss canbus from the JK as they also worked with my SMA. They are all similar hence why they work but the Deye may prefer one over another.
 
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Late last night I finally got it working. For anyone reading this in the future:

Make sure the DIPSW's are set to 0000.

And to answer my own question from above. The pinout is of course WRONG. CANH and CANL are not inverted! Just use a straight ethernet cable!
And the correct port on the JK is the second one from the dry contacts.

Thanks!
 

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