I agree. The Evotrex is too heavy for off-road use and it will require an F-250/F-350 tow vehicle. While it does have bigger tires and active propulsion this does offset the heavy weight to some degree.
I have had 3 F-150 PowerBoosts with the 7.2 kW inverter generator since they were introduced in 2021. This inverter generator is vey quiet, running the motor at 800 RPM but most importantly it does not continually run the ICE in the F-150. The ProPower 7.2 kW inverter generator actually runs off the high voltage LFP battery in the PowerBoost. So the trailer loads are place on the PowerBoost high voltage battery, not the traction motor generator attached to the engine. The ECU is only looking at keeping that battery between 30% and 70% state of charge irrespective of the demand placed on the inverter generator by the trailer it is attached to.
The result is that the ICE in the PowerBoost simply cycles on and off depending on the state of charge of the Powerboost high voltage battery. The Airstream I have been towing with the PowerBoost connected with a dual leg 30 amp umbilical to the inverter generator has a base load of around 300 watts when turned on. So sitting at a campsite the PowerBoost to support that load will start every 30 to 40 minutes, run at 800 RPM for about 5 minutes to top off the PowerBoost high voltage battery then automatically shut down. I have left it in that mode, locked and unattended.
With full pollution control equipment on the PowerBoost there really is no odor, it is very quiet and only drips water out of the tailpipe as it combustion water vapor condenses in the tail pipe.
Why more towable RV owners have not discovered the PowerBoost is a mystery to me. I see these guys in campgrounds with premium trim pickup tow vehicle lugging around these noisy stand alone generators with half the output of a PowerBoost, when for the same price you can get a higher trim F-150 PowerBoost with the 7.2 kW inverter generator as a "free" option.