There's a couple things you might do to max the solar collection;
The type of controller.
Mounting the panels above roof for air circulation due to the efficiency of panels relative to heat.
Mounting panels above roof high enough to circumvent shadows from other things mounted up there, like the AC.
Ability to angle panels to face the sun, or even better, track the sun.
Removable panels w/extension wire to place panels in sun when RV is in shade.
Mount panels to side of RV w/ability to adjust angles. This saves roof space at the expense of parking angle/position to maximize sun exposure.
Mono panels as opposed to poly crystalline panels to maximize amperage-to-panel size.
