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The Norfolk Broads Forum / Broads Boat Owners Q & A / Battery Charging
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Posted By Discussion Topic: Battery Charging

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dannyb1
Oct-21-2010 @ 8:39 PM                           Permalink
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checked it out, only two terminals will be linked plus to minus, the other two terminals are open and will be where you get the 24v from thus where the charger is connected and there will be 12volt passing over the linked terminals. Google is a wonderful thing

kfurbank
Oct-21-2010 @ 8:48 PM                           Permalink
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With regard to George's suggestion, I would strongly suggest against this, as the first time you forget to isolate the two batteries before charging, will be the last time you use that charger.

Dannyb1, with regards to the Sterling charger, I'm not sure if it can be used as you suggested. It would be highly unusual. I would suggest a purpose built 24V charger. You would conect the negative to the negative on battery number one. This batteries negative should also be connected to the negative running around the boat and to any other 12V batteries negative being used to supply 12V, NOT 24V. The positive would then be connected to the positive of battery number two. This is the point that should measure 24V+ if measured with a multimeter. The positive of battery number one should be directly connected to the negative of battery number two, by the shortest, thickest cable you can manage, with no other connections to either of these terminals. IMPORTANT, the negative of battery number two, should never be connected to any other negative, or the negative running around the boat.

Keith

dannyb1
Oct-21-2010 @ 8:54 PM                           Permalink
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Thanks for that keith, will be going for a 24volt charger I think,  This Sterling Pro Sport has 2 outputs with a positive and negative supply for each of the two outputs and probably a clever bit of kit inside the unit that works out its a 24volt battery and makes changes accordingly, that is unless I have misread the instructions but I am pretty sure thats what it said, I am also a bit dubious incase it ever went wrong.

Cheers
Danny

gallopinhairpin
Oct-24-2010 @ 10:59 AM                           Permalink
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Why not just buy an additional 12V charger and use one on each battery with the batteries still connected. I have a Gunsons automatic charger that I have just checked with a meter and found the outputs are floating. As long as at least one of the chargers has floating outputs you would be ok.

Regards,
Mike.


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