Electrical 101 - 3 concept drawings - Lithium, Add Inverter, Boost relay
The concept drawing offer the novice a way to understand RV electrical systems.
There are many ways manufactures achieve the goals but these are very common.
The inverter add on could be done in Class C or Trailers that did not come with a inverter.
2007 Country Coach Tribute 260 Sequoia
40' DP w/Cat400, F494513, Lithium Battery & Solar
Live next to Yosemite