One more graph. Same data late in the day when the Array Volts begin waning.

In the middle of the timeline, the controller drops from Abs=6 to Bulk=5 because it cannot maintain the battery at the Target Volts.
Here is raw data at the last plot minute:
SS MPPT 15L Meter
Main Screen
Serial = 16
Time = 2018-02-03 17:41:04
Charge State = 5
Target Volts = 14.83
Solar Input:
Array Voltage = 29.3
Battery:
Volts = 12.99
Amp-Hours = 23.8
Current = 0.26
Watts = 3.3879
kWhs = 140.5
Load:
Volts = 13.0
Amp-Hours = 0.7
Current = 0.08
Temperature:
RTS = 11
Heatsink = 18
Ambient = 17
HTH;
John