So, finally got some numbers from about the system. Also redid the battery positive stud to shut off switch with a new lug and 1/0 wire. There is also a 1/0 jumper from alternator case to a ground on frame.
Cold Idle: 14.30v @ battery, and 12.89v @ fuse panel
Hot Idle: 13.76v @ battery, and 11.80v @ fuse panel
So, looks like I have an issue with the panel feed/ground. It currently feeds off starter lug with a 8 or 4 gauge wire up to it and a short 10 gauge ground. I will call manufacturer tmmr, but my feeling was the ground is just for relays so power flows via each motor ground not all through that panel ground.
Other than that, looks like factory gauge is stupidly inaccurate and I was worrying over nothing
