BMS PROBLEM!!!

[rhino]

2) You may want to add some compression / restriction for bloating - there are many many threads about that on here.

This ^ since you have non-flexible busbars ANY expansion on those cells will cause a lot of stress on the terminals. If you find anyone who does not compress their LiFePO4 battery you will see they have to either use different busbars or reorient the cells differently so the busbars still work but cells have noticeable air gap between them. The Off grid garage YouTube guy does not compress his DIY batteries and Will Prowse did/does have a battery bank he also did not compress. Unfortunately this means you should rebuild your battery bank. If you do that looks like it won't fit on that shelf anymore.

 

[RogerW]

This ^ since you have non-flexible busbars ANY expansion on those cells will cause a lot of stress on the terminals. If you find anyone who does not compress their LiFePO4 battery you will see they have to either use different busbars or reorient the cells differently so the busbars still work but cells have noticeable air gap between them. The Off grid garage YouTube guy does not compress his DIY batteries and Will Prowse did/does have a battery bank he also did not compress. Unfortunately this means you should rebuild your battery bank. If you do that looks like it won't fit on that shelf anymore.

???

 

[RogerW]

I'm waiting on charge to reach around 50-55% to see if changing the one parameter was the pr9blem for bms shutting down. I'm really hoping it is. But while at that. Aren't the charge controllers, inverter and bms app display the same voltage? Since they all go to the same bus bar. The bus bar is copper 1/2 thick by 1-1/2 wide.or is it normal to have them all at different displayed voltage ?

 

[400bird]

There's going to be some voltage drop in the different connections and cable length. But I think the biggest delta is just due to measurement inaccuracy. PowMr doesn't include Fluke level volt meters inside the inverter. Same with the import charge controller.

 

[RogerW]

There's going to be some voltage drop in the different connections and cable length. But I think the biggest delta is just due to measurement inaccuracy. PowMr doesn't include Fluke level volt meters inside the inverter. Same with the import charge controller.

What would be a reasonable priced controller that would include that level volt meter?

 

[MisterSandals]

What would be a reasonable priced controller that would include that level volt meter?

I wouldn't buy a different SCC for the quality of the volt meter. Voltage is not that important as a reading on an SCC. If you think its affecting the quality of charge, then i'd CAREFULLY try to account for that with settings if possible.
If you want to know the voltage more accurately, compare with a quality meter, AT REST, and make note of the difference. Perhaps a piece of tape near the display with the correction to make when you read it (like "+.2V").

I would buy a better SCC for quite a few other reasons, like if it were running unattended 24/7 or i needed to have reliable power.

 

[RogerW]

Things seem to be working fine now, after the parameter changed on the overcurrent. Thank you everyone for your imput. I really appreciate it.