Grounding to frame/chassis vs. grounding direct from battery

[Jroo 10+ year member]

Is there any advantage to either? In my case I only have the single battery up front. I am going to do the Big 3 with 1/0 and will finally lay cables to the rear to start the system when it warms up. My power wire is 1/0 so I know my ground should also be 1/0. On a smaller set up and a car without a second batter, is grounding from the battery just overkill? Just wondering as I see it most with megawatt systems and strictly SPL guys. Anything that I should worry about or tips if I do decide to ground directly from the battery?

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[Jerhemy 10+ year member]

I initially had mine grounded in the back to the chassis/frame, and even though I ground to bare metal and did everything else you're supposed to I just didn't trust it. I ended up doing two runs of 1/0 ground wires back to front, mostly for piece of mind... to know the grounding capacity was the exact same as the positive capacity.

only thing I noticed was the VERY minor headlight dimming I had before when sitting still went away. I don't have a voltmeter installed or anything yet so idk how much it helped with that.

 

[k_schutte 10+ year member]

Let me help you with that...

 

[Jerhemy 10+ year member]

lol