On the 2018 model, the inverter is in the battery compartment, up on the ceiling. There is a power switch to turn the inverter on/off. You gotta be a bit of a contortionist to reach it. Or you can buy the handy remote switch.
2018 Redwood 3901WB Autumn Fire
3 A/C, Heat Pump, Dishwasher, Washer/Dryer, Disc Brakes, Onan 5.5kw
2017 Ram Longhorn 3500 Cummings/Aisin DRW LB CC and a cute little aftermarket fuel cap