House Battery Charge While Underway

Well you have TWO questions
Yes the batteries should be charging, and yes the magnum will say inverting unless you turn off the inverter function
It only makes charging voltage when it has 120vac ..either shore or generator, so it automatically goes to invert when not charging unless you turn invert off
You are driving so the inverter sees good voltage, no need to shut off inverter, if you have nothing turned on, there should be very little drain
My alternator voltage is not as high as I would like, but with solar and generator, I usually don't need to worry about it
It's not how many miles you drive it's how many hours, do you make that 300 miles in five hours drive or eight, it's hours of charge time not miles of charge time
Not enough hours of driving give it some more generator run time

prstlk wrote:
Once again I come to the best wisdom source to be found.

07 Holiday Rambler, 4 6v house batts, Magnum controller, Magnum inverter 2012.

Situation is, when we dry camp we run the gen for 2 hours when we stop, and another 1 hour in the morning. (might be more if we need the air)

Question is this. Should the house Batts not recharge from the engine alternator if we are driving from A to B for 300+ miles?

We have found looking at the control panel we are inverting going down the road.

Is there something we need to do different with the controller?
I find it hard to believe that after 300 mi we should arrive without fully charged house batts.

Thanks for all you do, you are all the best!