Not sure it is an example of the OPs question, but my four 6s are not really liking solar camping for months of shallow cycles and hitting 14.6 about every day for a time. (seeing lower SG when full now in August compared with April's full SG, and now they all show some cloudy stuff when being Equalized- a recent development)
The other way with no solar doing 50-90s and getting progressive sulfation that shut us down after ten days in a row of that, with a big "recovery" to 100% when back on shore power was probably not so good for the batteries either, but more important-- it was totally unsat for off-grid camping over a week.
At least this way with solar, we can keep on camping for months in a row for the electrical stuff, using the gen/charger method as required when solar gets behind due to cloudy days.
That smartgauge guy also mentions 6s don't like Float which used to be a Trojan thing 10 or so years ago, which was mentioned by Xantrex as to why they offered a two/three stage charger so you had optional Float. That story disappeared from the Xantrex site FAQ some years ago. Also mentioned in engineering edge article. They say high use deep cyclers have higher SG electrolyte which is harder to keep destratified so less easy to Float than lower SG batteries such as used for UPS.
At home I use a steady voltage 13.4v small charger 24/7, don't use solar for maintenance.
Seems batteries will "age" no matter what.
