Hi again Hally, and I think you need to do a bit of research as to what constitutes a fully charged battery.
Leigh has covered the charging possibilities pretty well, but you need to know the difference between a fully charged battery and a charging voltage.
A fully charged battery will have a SETTLED voltage of 12.7v. It is irrelevant as too whether the CHARGING voltage is 13.5v or 14.7v.
If the battery is fully charged, it is fully charged!
The one point of leigh’s post that I will reiterate is that while a low charging voltage will take longer to charge the battery from the 80% - 90% level to a fully charged state, the fact that an alternator will get a low battery to that 80% - 90% level MUCH SOONER than a DC/DC device can, means the low ( or higher ) voltage at the final charge stage is of little consequence to the total charge cycle.
Leigh has covered the charging possibilities pretty well, but you need to know the difference between a fully charged battery and a charging voltage.
A fully charged battery will have a SETTLED voltage of 12.7v. It is irrelevant as too whether the CHARGING voltage is 13.5v or 14.7v.
If the battery is fully charged, it is fully charged!
The one point of leigh’s post that I will reiterate is that while a low charging voltage will take longer to charge the battery from the 80% - 90% level to a fully charged state, the fact that an alternator will get a low battery to that 80% - 90% level MUCH SOONER than a DC/DC device can, means the low ( or higher ) voltage at the final charge stage is of little consequence to the total charge cycle.
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