GoPower! SW-3000-12 Inverter Shutdown?

Ok... I feel pretty stupid here. Memory failed me on multiple levels. Turns out my problem was the wiring between the batteries and the inverter. Checked with multi meter and there was a significant drop between battery and inverter. Took a look at my cables, they were 4 AWG not the 4/0 AWG they are supposed to be. Went and checked my purchase on Amazon, I ordered the correct wires... they sent me the wrong ones. I neglected to check them. Then I called GoPower tech dudes and they confirmed that had to be the problem.

Needless to say I thank all of you for your suggestions in helping me figure this out.