Issues with new setup...

[agarabaghi]

Well now that ive re-wired everything im having a weird electrical issue, so im sure it must be something in my wiring. Ive had all 3 amps in the boat before and this never happened, so unless my Alt is starting to die and act funny Im pretty sure its in the wiring.

So here is the setup, 3 amps, 2 batteries, 100amp "Battery Doctor" Isolator.

Right now I have

Starting battery - 0/1 awg positive and negative from the engine block / start to crank the boat, along with the 4awg positive and negative from the dash (power bilge, dash, lights, and ballast.

From the starting battery a positive terminal a wire runs to the "Main" connector on the Battery Doctor isolator. From "Aux" terminal on the battery doctor it goes to a 150amp breaker and then to the positive terminal on the AUX battery. The positive terminal feeds a 135amp breaker, which then feeds a distribution block, and each amp connects to that.

From the starting battery negative terminal, a wire runs to the negative terminal on the AUX battery, which then feeds the negative distribution block, and the amp negatives are fed into the distribution block.

The battery doctor also has a negative wire which is connected to the AUX batteries negative terminal

It seems that after a bit of high volume playing, the isolator goes into Charging over current mode. According to the manual this mean:

Charing-Over Current: Excessive current flowing while in charging mode. Over current can be reset by pressing the override/reset button or will automatice reset when the starting battery is below 12.8v indicating that the engine has stopped

Im not sure what is triggering this issue, im going to follow all my grounds and make sure everyhing is grounded properly, but im pretty sure it is.

I noticed this because the stereo would start to cut out at around 22 on the volume when usually it can go up to 25-27.

I took reading on both batteries, and since the isolator has stopped charging the aux battery, it was reading about 8v, while the starting battery was readying about 14 with the engine running.

Any ideas?