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jayjack

Adding a Battery Charger to my 244 Sunesta

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has anyone ever added a battery charger to their smaller size boat with a battery switch and 2 batteries?

I boat in salt water and the boat is kept in the salt water during the summer months.

With the coming of our 5th season with the Sunesta, I know I have to replace the batteries so I thought I would replace the batteries, add a battery charger and galvanic isolator to hook into shore power at the marina dock.

So what brands of each item - batteries, battery charger and isolator???

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For batteries, I've had the best luck with batteries made by East Penn Manufacturing. They market under the Deka brand, West Marine brand and O'Reilly Auto Parts (and likely more). I like the AGM combination deep cycle/starting batteries. They tend to handle heavy loads/recharges better than others.

For the battery charger, I just replaced mine. After doing some research I decided on "DualPro". So far I'm very happy with it - it has isolated charging circuits for each battery with individual battery charge state meters - does a nice job of "charge then maintain" on the batteries. In my other boat I have a ProMariner charger and its never had a problem in 9 years I've had the boat, so I'd recommend you check those out too. Size them for your needs - don't go bigger than you need (10 amps/bank may be plenty for you).

As for galvanic isolators, I think they all do pretty much the same. I have a guest on my 24' and as far as I know its performed fine. I just put a ProMariner ProSafe unit on my 30' and so far I'm very happy with it - seems to be very robust.

Good luck!

Ben

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I would go with ProMariner on the charger & isolator. The AGM batterys are better, My oldest one is 6 years old and still going strong and , I don't charge or remove them over the winter.

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My Lead batteries go well past 6 years. Always.

BUTT

You MUST constantly add water whenever the battery needs it.............Not when you think of checking it.

If the water drops below 1/2 of the total height ? The battery is FOREVER a 1/2 the cranking capacity of what it was brand new.

If you cruise in hot weather alot ? Every 2 weeks might be needed. Especially if you idle the engine all day & night for heat or A C.

You need to sprain your back on some boats.............More batteries? Longer sprains.

Buy one of the " automatic fillers ". They stop filling the cell at the right height.

WARNING !!!!!!!!!!!ONLY add water when the batteries are fully charged.

If you see white powder on any metals near the batteries ?????????? YOU waited too long. Get professional help to correct the overcharging of your batteries.

Used boats can have the WRONG BATTERY TYPE in them. Check it out.

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I was looking at the ProMariner chargers and found that they are hard to find they seem to be out of stock, then I went to the ProMariner web site where they indicate they are limited anyone know why?

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+1 on the Deka/East Penn batteries. They now are the suppliers of batteries for Mercury and Quicksilver brands too. (replaced Exide thank God)

On your particular model, if you wanted a combiner set-up that will fit your factory battery M-mini switch size and style, look at the following; is a direct replacement for what your boat currently has.

http://www.bluesea.com/products/7649/Mini_Add-A-Battery_Kit_-_65A

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Hey thank you guys as always great information.

I am currently running with a 2 battery system, using the one for starting and the second for when at anchor to run the music radio. When running, the system charges both (combiner is built into the 2 battery system). It's just that the distance between our favorite anchorage and our marina is not that far, thus the batteries don't get a chance to charge up that much. We always cruse before we anchor so, the batteries do get charged the next time we are out but, they (really just the one that is running the radio tends to stay in a depleted state) until next time I go out and they get charged.

Richard, thanks, I will wait a bit before I purchase the charger from ProMariner or go with the Nautic as you suggested.

Master Chief, we have the same boat and same engine, only differ in the year, (as a former Naval Aviator its always important to stay on the good side of a Master Chief!)

Shepard, thanks for the comment, I know its a bit of an overkill to add the charger and isolator, just my aviation background to have redundant systems!

Regards,

Joe

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I was looking at the ProMariner chargers and found that they are hard to find they seem to be out of stock, then I went to the ProMariner web site where they indicate they are limited anyone know why?

This is the charger I bought after doing some research - I got the three bank - very happy with it so far. http://www.dualpro.com/products/professional/

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