Agree leave your solar as is. If not there now, install switches for arrays to controllers so you can cut off "all charging sources" as mentioned.
Co-ordinate the low voltage with the low voltage alarm voltage of the inverter
I forget what gen you have to run the charger at 80a or whatever. The poster with Li has clarified that he can get more amps out per gen watts because of Li. At home , I cannot run my 75 amper (non-PF corrected) on shore power on long extension cord--it will run but only do 67 amps at low 120v input. So you might want to have an RV hook-up at home if not already, to be able to run the charger for the Lis.
Some lucky person is going to get your three Rolls. Drool.