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whats the best wayto go with 2 batteries?


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weedfan 
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Posted: July 24, 2009 at 3:07 AM / IP Logged  
if i connect them in parallel will that strain the alternator?  or should i use an isolator?
i am an idiot 
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Posted: July 24, 2009 at 4:18 AM / IP Logged  
If you use an isolator, they are still going to be connected in parallel. If you use a diode isolator, your battery voltage will be about 1/2 volt lower than it could be.
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weedfan 
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Posted: July 24, 2009 at 7:22 PM / IP Logged  
nope dont want the voltage lower
franka 
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Posted: September 21, 2009 at 8:02 AM / IP Logged  
I have a 1997 chevy 1500 pickup and I also am wanting to install a second Battery, the truck has an extra battery tray on the drivers side of the vehicle and a 3 or 4 Guage wire running from existing battery to the Brake system and it runs right across the extra tray. I have considered tapping into this wire for the pos.+ connection. My worry is if the primary battery has low voltage will the starter draw to much for the 3 or 4 guage wire on the second battery?
Plan Ahead
tommy... 
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Posted: September 21, 2009 at 8:31 AM / IP Logged  

Yeah...Probably upgrade the big 3...Use correct gauge power and ground...Here is some info on isolators... http://bcae1.com/battiso.htm ...Good luck!

Heres a little info on charging systems upgrades ,etc...! http://bcae1.com/chargin2.htm

Normally anytime you add a battery,cap,etc...It will put a strain on your alternator...Now the alternator has 2 batteries to charge...instead of one...

M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!
franka 
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Posted: September 21, 2009 at 9:01 AM / IP Logged  
Thanks all I want is to maintain a second battery for an RV I will only use it in a desperate situation. currently I have a 12V+ post in the trailer plug that will charge the RV battery. an if i set a third battery in the vehicle then the system with the trailer plugged in would have three batteries all drawing from (1) Alternator will this be a problem especially at night when the headlights an all the trailer lights are on??
Plan Ahead

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