Wiring two batteries..

[Lindstrom86]

My brother and I would like to run 2 batteries on our cars for our stereos. I know there are several options on how to run them. Does anyone have, or know where I can find schematics on how to wire up a system?

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[JimJ 5,000+ posts]

Wire them in parallel, and connect an isolator in between them...

 

[80INCHES 5,000+ posts]

dido......just bought 2 red top optimas...gotta buy one more

80

 

[Randy Savage 5,000+ posts]

IMO there's no need for an isolator...I've ran an extra battery for about a year and had no problems w/o an isolator...

 

[JimJ 5,000+ posts]

You have a 200A alt though //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

if he's got a 70A fleapower one, I would recommend isolating them.

 

[Goldtaz1 10+ year member]

You have a 200A alt though //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
if he's got a 70A fleapower one, I would recommend isolating them.

Can you elaborate on why you say this, I am looking to add a battery and I am trying to figure out why an isolator is a good thing as opposed to what snova said?

 

[Randy Savage 5,000+ posts]

I ran 3 batts off of a stock 70A alt...no problems whatsoever //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[JimJ 5,000+ posts]

He has a lot of current going to his batteries - I said that because if you try to charge too much combined off a small alt, you're going to send that alt to an early death. What size alt do you have?

*edit - deep cycle or no? //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif