Hi johnm1,
That depends on the charge acceptance rate of the battery bank and the capacity of the charging device.
When you double the battery bank by twinning the jars, the resistance is much lower, and so charging happens faster provided that there is a capable charger. Obviously a 2 amp charger is not going to charge twice as fast with such a doubling of capacity. But a 125 amp charger certainly would.
Generally at about 85% state of charge, a 100 amp-hour battery may only accept 12.5 amps (c/8). So if there are 200 amp-hours the acceptance rate would double to 25 amps, 400 would be 50 and so on. But the overall charge rate is still c/8 (again assuming a capable charging source).
AGM's may charge faster to say 93% capacity, and some LI formats can do c/1.
johnm1 wrote:
If I go the more batteries route ... have I read correctly that the battery bank will charge faster, at least up to the 80-90(ish)% range, or am I dreaming that?
