6 Volt Battery Charging
I just bought two 6 volt, 232 Ah, golf cart batteries. Initially, one of them was fairly well charged (6.38 V), while the other was not (6.04 V).
Since they are charging in series, the same current will flow into both of them. The one that started lower will never catch up, and will never get fully charged.
For reasons that I do not completely understand, the voltage difference between the two increased after several hours on the charger. At one point, I measured 6.59 V and 7.18 V. BTW, the manufacturer suggests bulk mode charging up to 7.75 V
I took took them off of the charger and hooked a 15 ohm load across the one with higher voltage until they were approximately the same. Then, I removed the load and connected the batteries in parallel to make sure that they were precisely the same. Next, I'll put them back on the charger in series.
Will this kind of imbalance keep happening? If so, is there a simpler solution, or am I worrying about nothing?
2011 Silverado 2500HD Duramax, 4x4, crew cab, long bed
Palomino Puma 253-FBS, 27' 5th wheel
1994 19' Class B on Chevy chassis