Raz, your post #21 above very interesting in that the desulfation mode of a smart charger is described as having the characteristic of "boiling" the electrolyte. My PD9245 autocycles to desulfation voltage for 15 minutes duration at interval of 21 hours. What number of cycles would put the battery
on the boil for a period of time sufficient to produce a significant loss of electrotyte?
Is increase or reduction of charging voltage based on electrolyte temp. difficult, expensive, physically cumbersome, commercially undeveloped, all of above? I suppose you are aware of self-styled battery
experts on the internet who claim that a wet cell 12v batt can't be "pressurized" to full charge at less than 15+V? Would these experts be risking boiling out their batteries or do they have "software switching" of charge voltage based on sophisticated predictions of batt chemistry which the rv converter maker either does not have or is not willing to implement?