FINAL ANSWER!
And the winner is: @water_rat !!
After the responses I both disabled temperature compensation and I adjusted the voltage set points on my MPPT down to 54.10V. I adjusted the MPPT voltages because I wanted to determine if the MPPT or the defaults in the Multiplus II were controlling the charge. As you can see in the plot below, charge behavior was “normal” the minute I disabled temperature compensation. I confess I still don’t understand why the MPPT would have been charging the battery above the voltage set point given that the voltage compensation is a negative number per degrees C and the batteries were relatively warm, in the 20C range. I can save this mystery for another day… but any explanations would be welcome (I could open Victron Connect app and look at the MPPT and it does provide good and valid temperature telemetry so I don’t think the temp sensor is a valid culprit).
Really appreciate all the input helping me get to the bottom of this! Thank you so much.
