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Discussion Starter #1
I recently tested my odessey at a.z (first mistake) they said it was dead. I bought a yellow top to replace. My son brought home a battery charger to replace mine which was stolen while I was charging his battery.
Long story short. I decided to put the old odessey on the charger and trickle charge it. I brought it back to life and it is 100% good

So now that I have a brand new yellow top AND a good odessey it make more sence to go duel battery set up since I have too many accessories such as winch, lights and amps.

Already have the isolator and everything, but my question is should I use the odessey for the main battery or the yellow top? The main is only going to run the general truck, the second will power my winch and accessories.
 

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Discussion Starter #2
Bump
 

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NorCal Chapter Pres
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I'd run the ody for the truck and the yt for winch/acc

Either way the yt will probably die soon anyways :p
 

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Discussion Starter #4
Well, that's the reason I got the yellow top, this is the second odessey I got due to poor performance , yet we have a red top that has been I three vehicles & over seven years old and doesn't seem any weaker than day one.

That's the reason behind the question...typical wisdom would say to do as you recommended but my experience is telling me the opposite
 

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truck ~n~ tow
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Optima does not recommend running dual batteries
that have different tech values/specifications.
I believe that is sound advise regarding efficiency.

tho' I'll doubt you would kill your system if you tried.

I ran one each (34R) Redtop, (34/78) Yellowtop on muh dual set up...
didn't seem to be of issue.
Both were fm the 34 size group
but they were of different technical purpose, capacity/resrv., etc.

I opted for another 34/78 yeller, soon as the red shit died (7 yrs !) ;)



The more powerful of the two batteries would be best for aux.
However... if you drain that down... it will continue to pull charge for awhile
and possibly deny the house battery's charge until full charge/recovery is satisfied.
Probably be ok...
but it's possible for the house battery to not receive charge,
while the Aux. battery recovers from it's discharge.

^ well.. unless you install a switch and control that manually


If the Aux. and starter battery are mismatched...
and the Aux is of higher capacity... a discharged state
will demand more from the alternator and for a longer period.

If you never deeply discharge yer Aux. battery...
you'd likely never notice.
 
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