I recently installed an inverter for the whole camper, a larger battery bank, a new PD9270 charger/converter, and an automatic transfer switch with help from the same folks ;)
Here is my thread.
Inverter-Charger-ATS-BatteriesI just updated the diagram at the end of the thread.
I definitely recommend the ATS. It makes it all "automatic" to switch between shore power/generator and inverter, while isolating the convertor/charger to only operate while getting external 120v via the main power cord of the camper.
Much appreciation to those who pointed all these things out and helped me get it worked out :C