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Install battery charger in cuddy cabin area?

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Install battery charger in cuddy cabin area?

Old 10-31-2018, 09:36 PM
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Default Install battery charger in cuddy cabin area?

My last battery charger I extended out the short wires with some 16 gauge wire about another 10ft or so and it worked fine. I'm looking to do the same with this new charger I bought for my new boat. I'm thinking i'll either put it inside a storage compartment inside the cuddy cabin area or stick it inside the console somewhere which is above deck basically. Opinions? I don't really want it in the engine compartment area due to the heat. Even the area by the batteries get a good bit of heat buildup
Old 11-01-2018, 08:17 AM
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Opinions?
Old 11-01-2018, 05:42 PM
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How big a charger, 10,30,50 How many banks and how long an extension.
Old 11-01-2018, 05:46 PM
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A 12 amp 2 bank charger. So 6 amps for each battery.
Old 11-01-2018, 05:47 PM
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Probably about a 12ft extension. I think the existing leads are only like 4ft.
Old 11-01-2018, 06:34 PM
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Battery charging voltage is dependent on battery temperature. Cold batteries require more voltage, which can reach 15V, and hot less voltage, may go down to 13 or so. (nominal 14.2 or so). The temperature is sensed in the charger, so I have mine in the engine room about 2' from the battery banks. Lets take a worst case:high temperature in the battery compartment (engine room) and an airconditioned cabin. The 15 volts or so may boil the battery.
Chargers are made to be in engine rooms. My charger is the Pro Mariner 15 which came with the boat in 2001, and I have been getting 6 years out of the batteries.

Just saying...….
Old 11-01-2018, 07:09 PM
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16 ga will probably be just fine but if its not too difficult I would move up to a 14ga. because when dealing with DC its the round trip distance so you will have to calc the voltage drop over 25 ft. It will only make a difference of about .1-.15v but for the best health of your battery and the proper operation of the charger its best to have the charger sense as close to the actual voltage on the battery as possible. I also agree, unless you have a separate sensor for battery temp dont put the charger in A/C and battery in engine compartment, but if both are exposed to the ambient air temp there should be no issue there either. Also make sure the area where the charger is located has some air ventilation if its confined in a small space. 12 amps is not hugh but it will generate some heat over a charge cycle and the microprocessors they put in the 3 stage smart chargers will not deal with that well. Some have fans you hear kick on when the charge starts and that air has to have some place to go or it just keeps getting hotter and hotter.
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Old 11-01-2018, 09:08 PM
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This is what i'll do then. It looks like they bolted the battery switch to a piece of 3/4in plywood and screwed it to the transom where the batteries are located. I think what i'll do is replace the plywood board with a larger one so I can mount both the battery switch and charger next to one another then I can probably just use the existing wires that come with the charger. Should I wait for the engine compartment to cool down before plugging the charger in? It's not a big deal to come back a day or two later after using the boat and just plug it in.
Old 11-01-2018, 09:43 PM
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It wont matter much but a cool battery will take a charge better. The more important thing is to give the battery charger plenty of time to do their job. A good charger bulk charges the battery to about 90% then it cuts back to a trickle charge for the last 10% which can take longer than the initial bulk charge and then it goes to a standby which may be a very low maint charge or a cycle on/off. Many people cut the charger before its had time for the last 10% and thats where they start to get sulfation. If you leave it plugged in all the time take a meter with you and check that during the STANDBY time the battery never goes over 13.4v or the charger could boil your battery dry even if its an AGM.

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