using multiple 4s/12v BMS in series for 48V battery

Just John

Photon Sorcerer
QUESTION: Anyone know/try if the ubiquitous 4s/12v BMS (from JiaBaiDa brand, xiaoxiang, china mfg, etc) can handle being placed (4x) SERIES to 48V battery bank?

Check the advertising that specifically states their 150 amp model supports 4 in series for 48v. They have told me when asked that the 120 amp model does as well.

Post in thread 'JBD / Overkill BMS 120A 4S Lifepo4 in series / parallel'


New Member

Just John

Photon Sorcerer
Just checked it, but the mosfets listed in the bom you posted from JBD only shows 30V max Vds. See their fet HY4903B
Then don't. I personally don't read Chinese, and thus can't find every data sheet. They tell me the 100, 120, and 150 amp are rated for 80v. I believe them.

The BOM is from the 200 amp that I have not asked about. Maybe you should?