Before you buy these big panels you need to measure the roof space. Try to be 12" to 18" away from the air conditioner, tall roof vents etc. If you use the tv antenna extended up it will all so be an issue. Even a small amount of shade on one cell can make a significant drop in solar production. This is where smaller 12v panels can outperform if you have space issues.
Cut some cardboard templates to mock up the roof positions.
Of course if you stick with portable you can spend the day moving the panels into the best sun.