on board charger

A/C & D/C Wiring, GPS, Radios, etc.
kgrove70074
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Joined: Mon Jul 14, 2014 8:06 am

on board charger

Postby kgrove70074 » Thu Aug 25, 2016 10:06 pm

while working on the boat I found one of my batteries was very warm, almost hot. Took it out and replaced it and my battery dealer told me the on board charger was overcharging the battery because of a bad cell in the battery and the charger would not shut off. He said the battery could have even burst.I had no idea that the on board charger could continue to charge a faulty battery and not shut down. The charger works fine with a new battery and shuts down or goes to a trickle charge as needed. It was amazing how hot that bad battery got. Just a heads up to all.
1980 28' FB sedan single engine 360 1.5 reduction drive trans

Tuggle
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Re: on board charger

Postby Tuggle » Fri Aug 26, 2016 8:33 pm

Just had the same experience with an AGM, Optima Red Top, battery was eight years old. Hot to the touch and would only reach 10 volts. Had it on a Battery Tender. Curious as to what kind of battery you had?
"Deplorable", 1975 32' Express, Twin 318's, Raw Water Cooled, Lake Lanier, Ga.

kgrove70074
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Joined: Mon Jul 14, 2014 8:06 am

Re: on board charger

Postby kgrove70074 » Fri Aug 26, 2016 9:27 pm

It was an interstate AGM battery that was several years old.
1980 28' FB sedan single engine 360 1.5 reduction drive trans

ukester
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Re: on board charger

Postby ukester » Sat Aug 27, 2016 8:58 am

what manufacture battery charger are you using and is it 1-2-3 bank charger? My boat still has the original and am thinking about replacing it.
mark ucakar

Tuggle
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Posts: 98
Joined: Sun Jun 26, 2016 4:42 am

Re: on board charger

Postby Tuggle » Sat Aug 27, 2016 10:20 am

Was using a Battery Tender on the one that overheated, no fault of the charger battery was just worn out. Recently purchased a Newmar PT-14W, have used there ABC chargers for years with good results.
"Deplorable", 1975 32' Express, Twin 318's, Raw Water Cooled, Lake Lanier, Ga.

honestcharlie56
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Posts: 231
Joined: Tue Jul 19, 2016 8:27 pm
Location: Lake Charles, LA

Re: on board charger

Postby honestcharlie56 » Sat Aug 27, 2016 4:54 pm

I like the higher end MinnKotas that actually (supposedly) will maintain the plates. but I don't see many people using those on bigger boats. Am I missing something?
1990 Marinette 32 Sedan Flybridge "Hubba" Lake Charles, LA
Twin Chrysler 318's