For years, now, NO ONE has explained the technical reason(s) as to why RV deep cycle dry (AGM) lead acid batteries require voltages greater than 14 volts to charge them fully if one has plenty of time to do less-than-14-volts charging. Is there some electro-chemistry reason - maybe related to activation energies, for instance?
In other words - for us non-full-time RV'ers who have plenty of time when at home to keep our RVs hooked up so that our stock single voltage converters can be left on continuously - why should we need to spend the money and effort to replace our single-voltage converters? What's the reason(s) that we might slowly be ruining (either by shortening their service life or reducing their capacity) our AGM batteries over time if we make and keep them "fully charged" this way when not on RV trips? What does "use 14.XX volts for cycle service charging" mean? Is this talking about faster charging back to original full capacity - or not ever getting fully charged back to original full capacity unless 14.XX volts are applied?
I guess I don't believe battery degradation happens from using lower charging voltages for long periods if someone can't explain it technically. Maybe there's a lot of battery hoopla out there?
