Charging Batteries
It is not uncommon for a charger to top off batteries after being charged the night before. The charge cycle for your cart charges your 48 volt system to approx 59-62 volts before your charger and your charge computer shuts off. Over night the batteries level off to approx 52-53 volts and when you re-plug the charger in again it is looking for that 59-62 volt range thus the top off hour. Now as your batteries get older that process excels, but all charging systems will do that. I would be more concerned about the carts performance than the sequence you have discovered .
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