How to i prevent these voltage spikes on the mppt battery voltage?

[simwe70]

How can I prevent these voltage spikes when charging? The BMSes max voltages are set to 3.55V, and the victron MPPTS are using the default "smart lithium setting".
Perhaps it doesn't matter that much, since the cell voltages are not in a that high dangerous territory with 28.5V?

 

[mikefitz]

The trace suggests the battery voltage is reaching absorbtion voltx, 28.4 for 'smart lithium setting', then dropping to float at 27 volts.
Over the period of the trace the battery has been reaching a higher and higher SOC after each day. June 12 was the first day the battery reached absorbtion volts.
Since absorbtion volts also equals protection volts, its possible the BMS is entering protection. Suggest increasing protection volts to 3.65 or lowering absorbtion volts using expert mode to 28.20 or 28.00.

Mike

 

[DIYrich]

Lower the max charge amps?