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Main Battery wiring thoughts. #2741979
02/19/19 11:20 AM
02/19/19 11:20 AM
Joined: Oct 2008
Posts: 6,717
Selma
odocoileus Online content OP
14 point
odocoileus  Online Content OP
14 point
Joined: Oct 2008
Posts: 6,717
Selma
Got an 88 model evinrude 30 that was originally a pull start model. Upgraded to electric start but did not have an alternator on it. Putting an alternator on it now, and my question is the best way to wire the batteries. I plan on having main battery and another deep cycle. Going to put a battery switch on it allowing me to charge both while running or use both in an emergency, or isolate them during use. Only electronics will be nav lights, lightbar, depthfinder, and a bluetooth direct amp. Anything I am missing or not thinking clearly about?

Re: Main Battery wiring thoughts. [Re: odocoileus] #2742058
02/19/19 12:15 PM
02/19/19 12:15 PM
Joined: Jul 2011
Posts: 39,377
Marshall County
FurFlyin Offline
Freak of Nature
FurFlyin  Offline
Freak of Nature
Joined: Jul 2011
Posts: 39,377
Marshall County
I would use the alternator to only charge the cranking battery. Most boats don't run enough on the water to charge the cranking battery back to what the fish finder pulled it down to. I know mine doesn't. A short, cheap set of jumper cables would let you crank the boat with your trolling battery in an emergency situation without having to unhook things.


If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14
Re: Main Battery wiring thoughts. [Re: odocoileus] #2742139
02/19/19 01:33 PM
02/19/19 01:33 PM
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
trlrdrdave Offline
14 point
trlrdrdave  Offline
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Joined: Sep 2007
Posts: 7,561
Hartselle, AL
Do you already have the switch? Them things are expensive to have one rated to pull starting current and last. Just use deep cycle for everything else and do what fur said. I've got a little solar charger that helps keep a little charge on deep cycle battery during the day. Or you could buy one of the 2 bank chargers and charge both while your running.


"In time of war, send me all the Alabamians you can get, but in time of peace, for Lord's sake, send them to somebody else." General Edward H. Plummer

"Blessed are those who, in the face of death, think only about the front sight." Jeff Cooper
Re: Main Battery wiring thoughts. [Re: odocoileus] #2742223
02/19/19 02:52 PM
02/19/19 02:52 PM
Joined: Oct 2008
Posts: 6,717
Selma
odocoileus Online content OP
14 point
odocoileus  Online Content OP
14 point
Joined: Oct 2008
Posts: 6,717
Selma
Do not have the switch. Found perko’s rated for continuous 250 amps for about 35 bucks. Not necessary for my setup but would be nice to be able to easily configure what battery is on.

Re: Main Battery wiring thoughts. [Re: odocoileus] #2742248
02/19/19 03:22 PM
02/19/19 03:22 PM
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
trlrdrdave Offline
14 point
trlrdrdave  Offline
14 point
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
Just remember once you put a charged battery in parallel with a discharged battery they are going to try and equalize. If you can still pull start it that might not worry you too much.


"In time of war, send me all the Alabamians you can get, but in time of peace, for Lord's sake, send them to somebody else." General Edward H. Plummer

"Blessed are those who, in the face of death, think only about the front sight." Jeff Cooper
Re: Main Battery wiring thoughts. [Re: odocoileus] #2742323
02/19/19 04:19 PM
02/19/19 04:19 PM
Joined: Feb 2011
Posts: 3,739
RBC, AL
D
Drake322 Offline
10 point
Drake322  Offline
10 point
D
Joined: Feb 2011
Posts: 3,739
RBC, AL
That motor does not have an alternator does it? Regulator/rectifier is just made to "maintain" a battery at 12.6-12.8v.

Re: Main Battery wiring thoughts. [Re: odocoileus] #2742340
02/19/19 04:36 PM
02/19/19 04:36 PM
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
trlrdrdave Offline
14 point
trlrdrdave  Offline
14 point
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
He said he was putting an alternator on it. "Maintain" just means charge. Battery doesn't care if it is from a rectifier or an alternator.


"In time of war, send me all the Alabamians you can get, but in time of peace, for Lord's sake, send them to somebody else." General Edward H. Plummer

"Blessed are those who, in the face of death, think only about the front sight." Jeff Cooper
Re: Main Battery wiring thoughts. [Re: odocoileus] #2742375
02/19/19 05:10 PM
02/19/19 05:10 PM
Joined: Oct 2008
Posts: 6,717
Selma
odocoileus Online content OP
14 point
odocoileus  Online Content OP
14 point
Joined: Oct 2008
Posts: 6,717
Selma
No it doesn't have anything on it now but will. You make a good point about the batteries in parallel. The only time I would foresee me running it like that would be in a situation to try to get some juice from the motor in a pinch. The switch is likely overboard but one of the problems now is the batteries are exposed and the mess of wires and terminals is awful about corrosion. I am looking to get the wiring cleaned up and get the batteries in an area where they are a little more protected.

Re: Main Battery wiring thoughts. [Re: odocoileus] #2742387
02/19/19 05:19 PM
02/19/19 05:19 PM
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
trlrdrdave Offline
14 point
trlrdrdave  Offline
14 point
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
Just cover posts in grease!


"In time of war, send me all the Alabamians you can get, but in time of peace, for Lord's sake, send them to somebody else." General Edward H. Plummer

"Blessed are those who, in the face of death, think only about the front sight." Jeff Cooper
Re: Main Battery wiring thoughts. [Re: trlrdrdave] #2742429
02/19/19 05:58 PM
02/19/19 05:58 PM
Joined: Oct 2008
Posts: 6,717
Selma
odocoileus Online content OP
14 point
odocoileus  Online Content OP
14 point
Joined: Oct 2008
Posts: 6,717
Selma
Originally Posted by trlrdrdave
Just cover posts in grease!

Ha in the current setup that would do nothing but piss me off as I am trying to take battery connections off and on.


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