Originally Posted by waiter21
You shouldn't need to run the generator to keep the batteries charged while cruising down the highway...
If the Dash AC won't keep up,, crank up the genny and turn on the roof unit. Make sure all the ceiling vents are closed, and also run the dash AC in MAX.
Running the dash AC on max should only be done until the air coming from the dash vents is cool enough. Then turn the switch to AC or norm.. Running on max all the time will cause icing on the lines. Same process as running a refrigerator/freezer on too cold of a setting. Keep in mind that an air conditioners function is not to cool the cab but to remove warm air from a vehicle.
I do agree that if the dash air is not cooling you enough (especially when having other passengers), run the gen. and turn on the house air.
If it's just the wife and I, we'll sometime hang a blanket from the overhead bunk to keep as much of the dash air in the front area. So far has worked well.