This is a summary diagram I created to help people new to RV's better understand the electrical systems in an RV. The direction of the arrows shows the flow of power. This diagram might not exactly match your specific RV, but the overall idea is applicable. Also, this does not show all the details. The usual disclaimer applies, that before working on your RV electrical systems you should get actual training, and consult the detailed diagrams for your specific RV.
If would like to print this, here it is as a Powerpoint slide.