Kilovault 1800 HLX V3 BMS voltage higer than read at terminals?

[dlowery808]

Hello All,
I have 4 HLX1800 V3 12v 150ah LiFePo4 batteries. Recently one has started misbehaving. When checked with the KiloVault Bluetooth app, it shows a voltage of 13.4 volts. When checked with a multi-meter it only shows 12.88 volts. I have the ability in the app to see the mv of each cell and they are in line with the voltage the BMS is stating. I'm just trying to figure out why the voltage at the terminals is so low/different. Also, the BMS won't allow any further charging to reach the 14.1 volts that is recommended by KiloVault

I have tried several 12 volt things/tools to create a current draw to see if that might wake the BMS up and fly right, but no joy.

Thanks!

 

[sunshine_eggo]

I am seeing multiple brands of batteries that measure ~12.9V at the terminals immediately following charge protection.

Try loading the battery. Does the BMS/measured voltage converge?

 

[dlowery808]

I am seeing multiple brands of batteries that measure ~12.9V at the terminals immediately following charge protection.

Try loading the battery. Does the BMS/measured voltage converge?

No it doesn't. I have had some issues out of this battery / BMS for some time, but not to this degree. I may have to crack open the case and replace the BMS if I could figure out how to do it without destroying the case. Per KiloVault instructions, I tried to drain the battery to BMS shutdown, but it went all the way to 9 volts and still hadn't tripped the BMS.