constant 14.6 "at the batteries" will indeed boil batteries
I'm not on shore power, there is no applied charge voltage from dark to dawn unless I run the generator, the solar has NOT YET gotten the batteries up to gassing voltage,
IF & WHEN that point is reached I can assess the situation and reset the controller output If necessary
at the last posted reading "Solar Applied" voltage was 13.55 at the battery and the system accepting 12.20a minus the 2.5a the fans were using, less than 10amps actual charge, the batteries were still thirsty and were not at gassing voltage,
your concern is that I am going to be holding the batteries at gassing voltage for unduly long times via the solar charging, that has not happen,maybe next summer, winter is only going to get less sun and more wet and less charging.not more