Little help on wiring up second battery.... pics :)

[hoxie08 5,000+ posts]

Need help with wiring up 2nd battery and all... should I do it like this

or just ground everything to chassis where it is.... like this

or am i just completely wrong? lol

Click to read more...

 

[reed dollaz 10+ year member]

first 1

 

[hoxie08 5,000+ posts]

i also just read 2 fuses between the batteries is necessary.... 1 12" from front battery and 1 12" from rear battery in case the power cable gets cut....

 

[reed dollaz 10+ year member]

i would use more than 2 just to have backup. 4 would be sufficient.

 

[Korn4Life 5,000+ posts]

first

 

[hoxie08 5,000+ posts]

what do you mean?

 

[dcole18 5,000+ posts]

either would work... the best would prolly be a combination... both batts share a ground wire and each one also has its own chasis ground

and you need to put a fuse in between the batts on the positive run

 

[DidUHearThat? 10+ year member]

First one, except the fuse should be near the battery, not near the alternator; and use 2 fuses and an isolator/relay between the two batteries.

If the Nine.1 is more than 3 feet from the second battery, I would just ground it to chassis, rather than run a long ground wire.

http://www.darvex.com/miva/merchant.mvc?Screen=PROD&Product_Code=SGP32&Product_Count=1

 

[hoxie08 5,000+ posts]

either would work... the best would prolly be a combination... both batts share a ground wire and each one also has its own chasis ground

and you need to put a fuse in between the batts on the positive run

yeah. i just found out someone said its best to fuse 12" from each batt... so that'd be 2 on just the + line between batteries... and yeah, i think i'll ground both batteries to the chassis, does make sense to have as many easy connections as possible..

 

[hoxie08 5,000+ posts]

is it absolutely necessary to use an isolator though?

also..... i only have 2 guage wire, but its really big and thats what ALL of this will be done with (bro bought me 40 feet for christmas).... what size fuses... 200 amp... 250?

 

[dcole18 5,000+ posts]

do that

 

[dcole18 5,000+ posts]

and if youve got an HO alt then the isolator isnt a must....

 

[Blazin_Jason 10+ year member]

I was going to do it like the first pic but decided to use the second run for + as well. So 2 + runs and then 2 - grounds directly to the frame.

 

[hoxie08 5,000+ posts]

i dont have an HO alt right now..... didnt really think it would be necessary for 1200w.... do i still need an isolator?

 

[dcole18 5,000+ posts]

i dont have an HO alt right now..... didnt really think it would be necessary for 1200w.... do i still need an isolator?

i wouldnt... but thats just me