Solar Panel question?

My personal opinion here,as I have done extensive research on solar. It mainly depends on what and how many batteries you want to recharge. Simple 12volt parallel batteries can get by with smaller panels and a simple PWM charge controller. Anything of 24volt and above larger panels. If you mount this on top of rv then you will always have to park in the sun and no shade. Personally I want my panels off the rv. Now you have to think about wire size and how far away from the batteries you will be. The shorter is best. So to answer the question, for me it's no question larger is better. MPPT charge controllers cost more but in long run best.