battery charging

[Guest borealboy]

I have a new (to me) boat with two deep cell batteries connected to my trolling motor and other electronics. When I charge them, can I just charge one or do I need to charge them each separately? They are both wired together.

[eddylives 99]

I would say yes they can be charged together , no one charges them up seperatley in campers, trucks or anything like that so......(I know you should not mix old and new , the old one drags the new one down to its level or something like that lol).

Please correct me if I am wrong if anyone knows different.

[GC 54 31]

The 24 volt system in my boat remains hooked up at all times, which includes when the batteries are being charged. I have a built-in 3 bank charger that uses 2 of the banks to charge the two deep cycle batteries separately on the 24 volt system, and the other bank charges my deep cycle accessory battery. I have a cranking battery as well that is solely used for cranking and I depend on the charging system of the Merc to keep that battery charged.

May I suggest you purchase a 2 bank charger (thats if you do not have a separate accessory battery, then you would want a 3 bank charger), then you only need to plug it in each time you get home to charge the batteries back up. Saves lots of hassles.