Thanks for all the replies on this.
Just tested with engine running and inverter was flawless. GAS/AC refrigerator ran fine on inverter power. (switched to automatic and propane valve off)
Dropped the alternator charging voltage on the coach battery circuit from 14.4 to 13.7 running the INVERTER/REFRIGERATOR combo, but at this voltage, the house batteries should still be charging fine while driving.
Definitely a HAPPY "rv" CAMPER here!