problem sync bms and mppt victron

[Libertad87]

Hi everyone,

I have a victron mppt 150 35 and a bmv 700 battery monitor.
i have a 560 amp bat lifopo4 4s2p with a jbd bms

when my soc from the bmv reach 80% its go on float, so i try to put the absorbtion put a little bit higher on the mppt..but the bms enter in security and block everything
i block the cell around 3.62 each
if i ublock higher its can go to 100 % but i dont want to oveload my cell.
any advice

 

[sunshine_eggo]

Hi everyone,

I have a victron mppt 150 35 and a bmv 700 battery monitor.
i have a 560 amp bat lifopo4 4s2p with a jbd bms

when my soc from the bmv reach 80% its go on float, so i try to put the absorbtion put a little bit higher on the mppt..but the bms enter in security and block everything
i block the cell around 3.62 each
if i ublock higher its can go to 100 % but i dont want to oveload my cell.
any advice

Please provide all MPPT (include expert) and BMV settings

 

[740GLE]

When was the last time you synced 100% SOC?

When you see a cell hit 3.6v what is the max delta with the lowest cell voltage? Should be less than 0.050v

What sort of balancer do you have? Just the JBD BMS?

 

[mikefitz]

It's probable,
a ) the BMV 700 is not set up correctly for lithium charging from solar.
b) the absorbtion voltage is set at too high a value.
c) there is cell inbalance.

Along with the charger and monitor settings, a screen capture of the cell voltages at BMS shutdown would be useful.
Is your battery constructed from 4 cell pairs in series, with a single BMS?

Mike