wiring and ground.

[I like FI 10+ year member]

Im running 2 ups agm batts in the back right now.

i have 1 run on pos. and 1 run neg. 4 gauge to the front batt.

The rear batts arent grounded to the frame, is it recomended that way?

I just recieved 000 gauge wire, could i add the big wire to the 4 gauge ones, so that ill have 000 gauge runs and 4 gauge runs, that way 4 gauge adds a lil bit of more copper.

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[shaneb 10+ year member]

electricity will choose the path with least resistance. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

You might as well loose the 4g wire if you put the 3/0 on there. 3/0 is plenty of copper to do what you are intending it to do.

And your grounding question confused me. You are running the negative from the rear batteries straight to the negative on the front battery, instead of just grounding it to chassis?

If that is what you are doing, that is fine, you can do it either way, running it to chassis, is the same thing, only instead of completing the circuit through wire, you are doing it through the cars chassis.

So you may even be better off with running it straight to front battery, as there will be less resistance in the copper, than there would be in the chassis.

 

[I like FI 10+ year member]

How about running all batts in the back?

Because underhood temps kill agm batts(shortens life) my yellow top in the front is dieing.