I'm ok giving up on the coffee maker.
I also found a better inverter (I think?) it's 1000w pure sine
We just bought this camper and for now I'm only running 2 batteries(1 - 27 dc and 1 - 31dc) the goal is to replace them with 4- 6v golf cart batteries by next year.
I appreciate all your comments!
I want a foul proof system as I can be pretty forgetful and I know that if I have manually flip breakers and switches, I'll be blowing something up at some point...
An automatic transfer switch sounds like the way to go. I should be able to pick 1 up locally at a electrical wholesaler shouldn't I?