ependydad wrote:
get rid of the hokey extension cord + backfeeding of camper
That is not back feeding. Back feeding generally involves a cord with a male plug at each end. aka dead man's cord or suicide cord.
Plan looks generally good.
I agree on larger inverter, say 2000 watts, to run any large item that plugs into a normal outlet. (one at a time) Microwave can draw 170 amps BTW. Maybe a little less amps on lithium as voltage sag should be less.
Your transfer switches may need some work. You need switches rated for the full generator power. As shown the generator power goes through a 15 amp switch. Are there two breakers on the generator? What is the rating(s)?
Also the inverter needs to be wired so it does not feed the converter. You can put the 15 amp transfer switches on the branch circuits (outlets only) or do the subpanel to break out inverter vs non-inverter circuits.
