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I want to ad a 2 bank charger to my boat. My two batteries are wired in series, should i hook the charger to both batteries or hook the leads to just one? If I hook to both will it fight itself being they are wired in series?

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I want to ad a 2 bank charger to my boat. My two batteries are wired in series, should i hook the charger to both batteries or hook the leads to just one? If I hook to both will it fight itself being they are wired in series?

I have the same setup. hook the leads to each battery not just one.

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I want to ad a 2 bank charger to my boat. My two batteries are wired in series, should i hook the charger to both batteries or hook the leads to just one? If I hook to both will it fight itself being they are wired in series?

If it is a 24 volt charger hook it across both.

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parallel is correct, still would hook to each one?

Yes. I was told by at Johnson Outdoors they need to be to each battery.

A 1 bank charger will not work on two batteries hooked in parallel. It will only charge the first battery.

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two 12v batteries hooked together - parallel = 12v, series = 24v. Your batteries are connected in parallel making them a 12v battery. If you hook the charging system to one battery, that battery will be charged by the charger and the battery being charged will charge the other battery. This will work just fine but to charge them both equally at the same time, connect the negative from the charger to one battery and the positive from the charger to the other.

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I guess I am not completely accurate after thinking about it. It depends on where the batteries are at, how they are hooked together determining the resistance on the leads from battery to battery. Either way, hooking to each terminal on one battery will work just fine. To be 100% sure you are putting the same amount of charge into each battery which really isn't all that important, you will have to connect one lead to each battery, again depending on resistance determined by the lead length/material and connection integrity.

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