does ground and power wire BOTH have to be OFC 0 guage?

[Jessica]

i may be mistaken on the direction of flow, i might be thinking of something else. Whatever the case, grounds are typically a failure point in most systems so do it right.

[akuma4u]

Ok, I was going to make a new thread for this but no need

Yesterday when I went to charge my hood and trunk batt I found something weird. The hood batt was 25% drained or so . Took several hours to fully charge. When it was I then moved to the rear batt and the rear batt was fully charged still like it wasn't even used at all. Why is that? The batt are both agm but diff brand

No big 3

And no 0g ground going from - to - from hood to rear. Instead they are each grounded to the chassis/body.

[Efreakingt]

Ok, I was going to make a new thread for this but no need

Yesterday when I went to charge my hood and trunk batt I found something weird. The hood batt was 25% drained or so . Took several hours to fully charge. When it was I then moved to the rear batt and the rear batt was fully charged still like it wasn't even used at all. Why is that? The batt are both agm but diff brand

No big 3

And no 0g ground going from - to - from hood to rear. Instead they are each grounded to the chassis/body.

If they are on the same circuit then they should charge together.

[akuma4u]

There is another theory: when I charged the hood batt first it took several hours but since it's connected to the trunk batt perhaps BOTH got charged at same time? Then when the hood batt was full and I went to rear and put the charger on that's why the rear batt was already full?

[3vil]

That would make sense. I'm assuming you didn't check the rear battery before charging the front one?

[akuma4u]

3vil: yes u r correct I did not check the rear batt first.

now about running a 0g ground between - to -

Is that really necessary if both batts are grounded separately to the chassis?

[Efreakingt]

The chassis ground is a giant wire between the 2. The batteries are connected so any charge runs between them both unless you run an isolator.

[akuma4u]

Ok so is it necessary to run a chassis ground (0g ground wire from - to -) or can I just leave them each separately grounded to the body with no long run of ground connecting the two -'s???

[Efreakingt]

I think the answer to that is dependent on the current draw of the system and the quality of the chassis ground. In some cases it's enough and others it may be less than optimal.

[akuma4u]

I have a crescendo bc2000 amp and NVX 900 jad 4 channel amp

Do I need the chassis ground?