Charging 2 batteries

Bobby · 02-13-09, 06:59 PM

New here well not totaly new just do not post much and have a question. I just bought a 1970 Skeeter 85-90% restored. It has 2 batteries can I charge them by hooking up to 1 battery or do I disconnect them and charge seperatly

MIbasser · 02-13-09, 07:13 PM

Bobby, how are the batteries currently set up? Are they for a 24V TM or is one TM and the other the cranking? I have 2 batteries 1 cranking and one TM and use a 2 bank charger. Some guys that run with 3 batteries will run a 3 bank charger.

Bobby · 02-13-09, 07:18 PM

Quote:

Originally Posted by MIbasser

Bobby, how are the batteries currently set up? Are they for a 24V TM or is one TM and the other the cranking? I have 2 batteries 1 cranking and one TM and use a 2 bank charger. Some guys that run with 3 batteries will run a 3 bank charger.

They are hooked up togather looks like they run the trolling motor. They do crank the motor but they are wired togather looks like 24 volt set up Positive to positave and neg to neg jumper wires

Rebbasser · 02-13-09, 07:38 PM

Bobby, that is a parallel setup for 12V. If it was TM+ to battery 1 +, battery 1 - to battery 2 + and battery 2 - to TM - it would be in series for a 24V system. To answer your question, if you have a 2 bank charger do both at once. If you have a 1 bank charger do one at a time but disconnect one of the jumpers from one of the terminals.

Captmikestarrett · 02-13-09, 07:41 PM

That is not normal but it works. Two batterys in paralel provide more cranking amps. But has a few drawbacks like single cell failure means no amps. Also corrosion build up is much faster.

I think the main reason for dual battery setups is a bad starter. If an engine kills a single good battery on starting and crank is slow it is a sign of a bad starter. Also wires will get hot on starting.

It will also burn up an alternater as it will never fully charge.

So separate the batterys via dual throw switch and add a dual bank charger.

Capt Mike

Bobby · 02-13-09, 07:44 PM

Ok thanks was not sure And do not have charger yet. Now I know what to buy 2 birds with 1 stone. Now I have to get good at Bass fishing i'm a catfish guy But I want some bass

Bobby · 02-13-09, 07:51 PM

Quote:

Originally Posted by Captmikestarrett

That is not normal but it works. Two batterys in paralel provide more cranking amps. But has a few drawbacks like single cell failure means no amps. Also corrosion build up is much faster.

I think the main reason for dual battery setups is a bad starter. If an engine kills a single good battery on starting and crank is slow it is a sign of a bad starter. Also wires will get hot on starting.

It will also burn up an alternater as it will never fully charge.

So separate the batterys via dual throw switch and add a dual bank charger.

Capt Mike

I'm not 100% sure but I do not think the old engine has an alternator Its a 1970 chrysler 45 hp Did they have altenators on them back then?

Captmikestarrett · 02-13-09, 08:02 PM

Yes in 1970 I was fishing the Poor Boy Tourny series on the east coast.. My Terry had an alternator..

Capt Mike

Bobby · 02-13-09, 08:10 PM

Quote:

Originally Posted by Captmikestarrett

Yes in 1970 I was fishing the Poor Boy Tourny series on the east coast.. My Terry had an alternator..

Capt Mike

Ok will do what you suggested Have never seen batteries hooked up that way. Have not removed the engine cover will do it tomorow if there is an alternator I will be able to tell.Bought the boat from a person I know. It fires off first try every time and its my first boat. Thanks for the help guys

Captmikestarrett · 02-13-09, 08:26 PM

I had racecar once that required two batteries in parallel in order to start it.. It ate starters up too. But that was not from the batteries it was from the torque and twist breaking the starter in half against the crossmember..

I ran two chains to the top of the motor and welded in a second crossmember the connect the chains to.. No more broken starters..

But the left wheel would walk at the line..

Capt Mike

boater · 02-13-09, 08:47 PM

you can have them hooked up for 24 volt for a TM and have one of them hooked up to the starter as 12 Volt you would not be able to charge both at the same time if this is the case unless you have a 24 volt charger and I personaly would not recomend it because you don't know if one is charged higher than the other
or if one is not chargeing right, MY >02

Bobby · 02-15-09, 12:38 AM

Quote:

Originally Posted by boater

you can have them hooked up for 24 volt for a TM and have one of them hooked up to the starter as 12 Volt you would not be able to charge both at the same time if this is the case unless you have a 24 volt charger and I personaly would not recomend it because you don't know if one is charged higher than the other
or if one is not chargeing right, MY >02

I seperated them 1 starts the motor now and 1 runs the trolling motor. Both are being charged over night Gonna check it out tomally at the lake Joe Pool. Still fired off just fine

02-13-09, 06:59 PM	#1
Bobby BassFishin.Com Member Join Date: Oct 2008 Location: Grand Prairie Posts: 26	Charging 2 batteries New here well not totaly new just do not post much and have a question. I just bought a 1970 Skeeter 85-90% restored. It has 2 batteries can I charge them by hooking up to 1 battery or do I disconnect them and charge seperatly __________________ I'd rather be fishin :p

02-13-09, 07:38 PM	#4
Rebbasser BassFishin.Com Premier Elite Join Date: Jun 2003 Location: San Antonio, TX Posts: 10,141	Bobby, that is a parallel setup for 12V. If it was TM+ to battery 1 +, battery 1 - to battery 2 + and battery 2 - to TM - it would be in series for a 24V system. To answer your question, if you have a 2 bank charger do both at once. If you have a 1 bank charger do one at a time but disconnect one of the jumpers from one of the terminals. __________________ It's happened to the best of them: John 21:3

02-13-09, 07:41 PM	#5
Captmikestarrett BassFishin.Com Super Veteran Join Date: May 2006 Location: Accokeek MD Posts: 3,315	That is not normal but it works. Two batterys in paralel provide more cranking amps. But has a few drawbacks like single cell failure means no amps. Also corrosion build up is much faster. I think the main reason for dual battery setups is a bad starter. If an engine kills a single good battery on starting and crank is slow it is a sign of a bad starter. Also wires will get hot on starting. It will also burn up an alternater as it will never fully charge. So separate the batterys via dual throw switch and add a dual bank charger. Capt Mike __________________ Capt Mike Starrett light tackle guide Potomac River http://www.indianheadcharters.com

02-13-09, 07:44 PM	#6
Bobby BassFishin.Com Member Join Date: Oct 2008 Location: Grand Prairie Posts: 26	Ok thanks was not sure And do not have charger yet. Now I know what to buy 2 birds with 1 stone. Now I have to get good at Bass fishing i'm a catfish guy But I want some bass __________________ I'd rather be fishin :p

02-13-09, 08:02 PM	#8
Captmikestarrett BassFishin.Com Super Veteran Join Date: May 2006 Location: Accokeek MD Posts: 3,315	Yes in 1970 I was fishing the Poor Boy Tourny series on the east coast.. My Terry had an alternator.. Capt Mike __________________ Capt Mike Starrett light tackle guide Potomac River http://www.indianheadcharters.com

02-13-09, 07:13 PM	#2
MIbasser BassFishin.Com Super Veteran Join Date: Feb 2008 Location: Okemos, MI Posts: 1,447	Bobby, how are the batteries currently set up? Are they for a 24V TM or is one TM and the other the cranking? I have 2 batteries 1 cranking and one TM and use a 2 bank charger. Some guys that run with 3 batteries will run a 3 bank charger.

02-13-09, 08:26 PM	#10
Captmikestarrett BassFishin.Com Super Veteran Join Date: May 2006 Location: Accokeek MD Posts: 3,315	I had racecar once that required two batteries in parallel in order to start it.. It ate starters up too. But that was not from the batteries it was from the torque and twist breaking the starter in half against the crossmember.. I ran two chains to the top of the motor and welded in a second crossmember the connect the chains to.. No more broken starters.. But the left wheel would walk at the line.. Capt Mike __________________ Capt Mike Starrett light tackle guide Potomac River http://www.indianheadcharters.com

02-13-09, 08:47 PM	#11
boater BassFishin.Com Active Member Join Date: May 2006 Location: O'Fallon Missouri Posts: 283	you can have them hooked up for 24 volt for a TM and have one of them hooked up to the starter as 12 Volt you would not be able to charge both at the same time if this is the case unless you have a 24 volt charger and I personaly would not recomend it because you don't know if one is charged higher than the other or if one is not chargeing right, MY >02

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