I have 3 deye lithium phosphate batteries SE-G10.2. Have connected the lithium batteries to cerbo gx using victron type A/type B cable paying attention to battery side and victron side. The cerbo gx does not detect the batteries despite setting VE can 2 to bms can 500 LV . The cerbo gx mk2 has the latest software(3.72) what could be the issue?
Deye is not a supported battery. It’s BMS needs to support the Victron CAN spec, comms is not universal, it just doesn’t “work” if you plug CAN ports together, they all need to have the right comms profile configured on both sides.
As an unsupported battery you really need to ask Deye or their supplier if the BMS does support victron or not.
You can only swap the original Deye BMS for a third‑party unit, e.g. JK.
There are no other compatibility options.
Or add a bmv and charge it old school.
Hi Nick!
I don’t need it - I’m fine 
, it’s for @Wema.
Besides, I’m a proponent of full CAN data exchange and a big fan of DVCC functionality.
BMW has loads of nuances and restrictions.
Indeed, but unfortunately that is not often the case in the diy world.
I don’t understand how anyone would attempt such a thing without basic research or consulting a professional, other than chatgpt.
I can’t speak about Deye but I think Victron Type A and Victron Type B are different cables. Find out from people who are using Deye batteries with Victron what they did or, as others have suggested, find out from Deye what you need to do. Unsupported doesn’t mean they don’t work, it simply means Victron disavow an obligation to help you.
Understood.
Most chinese lithium batteries with bms use almost related protocols, for your information, i have two other systems one using the cerb gx with old firmware(3.42) and deye batteries seg-5.1 and working perfectly. The other has SNRC both unsupported but by matching the Can H and Can L pins, and setting the dip switches, works pefectly