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Old 06 May 2016, 12:23   #1
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Country: Ireland
Town: Donegal Bay
Make: ribtec
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Battery charging

My boat has been laid up for most of the winter and the cover has just come off. I want to give the batteries a charge but they are concealed in the depths of the console. I have to unscrew the console and tip it back to gain access. My question is can I go to the engine and connect the battery charger to the power leads there? There are 2 batteries each with an isolators and a third linking isolator and if I switch these on it should connect the cables on the engine to the batteries. Will I do any damage to the engine? The engine is a 1990s yamaha 175 2 stroke.
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Old 06 May 2016, 12:31   #2
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Country: UK - England
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If you know which wires they are and polarity disconnect and yes charge from there then you won't have any probs it shouldn't hurt anyway but makes sure.

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Old 08 May 2016, 22:39   #3
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Seems to me that, when running, the batteries are seeing 14.5 or so volts. Chargers generally run 13.5 to 14 with a load, as I recall. Batteries (and connected electronic switches) shouldn't see any difference whatsoever.

jky
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Old 17 May 2016, 06:19   #4
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Just a quick update to say that this process went off fine. I would like to stress that it worked on MY engine and set-up but its not to say it will be advisable for every set-up
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Old 17 May 2016, 07:12   #5
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Just as a side,,,over the winter, I connected a 20w solar panel through my external power connecter, this year I didn't have to buy a new battery, and it was well charged, and ready for use.
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Old 17 May 2016, 07:47   #6
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you could look into electric fence chargers they do solar pannel chargers will be cheaper than marine stuff
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