I'm living in Hanoi, Vietnam. Currently I use 3 JK BMS. Until recently I thought that JK BMS rocks, however now I'm in doubt and searching for better alternative.
1. The first bms I use it in 4-cell configuration to assist my EV lead-acid battery. It used to work perfectly for few months, then suddenly I can no longer scan it using Bluetooth. I was thinking it' dead, but not completely dead, I turn it off, turn on again and everything works again.
2. I used 2 JK BMS for solar storage. Those used to work for few months perfectly. Now very often one of them causes trouble, when bms turn off discharge due to cell under voltage protection, battery pack voltage drops to very low level, something like 10v. In the app I see that all cell around 3v and my 15 cells gives around 45v, what is normal, but measurement shows that voltage drop in B- P- circuit is very big, about 35v (sometime 25-30v). Due to battery pack low voltage, my Deye inverter show "No battery" error. Only rebooting jk bms helps, so it's clearly bms problem.
Do some of you have same problem? What is better alternative?
Thank you
P.S. First bms is 40A 8p, 2 others 150A 24p
1. The first bms I use it in 4-cell configuration to assist my EV lead-acid battery. It used to work perfectly for few months, then suddenly I can no longer scan it using Bluetooth. I was thinking it' dead, but not completely dead, I turn it off, turn on again and everything works again.
2. I used 2 JK BMS for solar storage. Those used to work for few months perfectly. Now very often one of them causes trouble, when bms turn off discharge due to cell under voltage protection, battery pack voltage drops to very low level, something like 10v. In the app I see that all cell around 3v and my 15 cells gives around 45v, what is normal, but measurement shows that voltage drop in B- P- circuit is very big, about 35v (sometime 25-30v). Due to battery pack low voltage, my Deye inverter show "No battery" error. Only rebooting jk bms helps, so it's clearly bms problem.
Do some of you have same problem? What is better alternative?
Thank you
P.S. First bms is 40A 8p, 2 others 150A 24p