Please. Stop guessing randomly. You have acknowledged that you have no electrical knowledge. The reason nobody has given you any firm suggestions is because we need better information from you.
Please just do this for thr group: When one of the breakers trips, go inside the RV and test EVERYTHING. Every appliance. Every light. Every fan. Every outlet. Make a list, and note whether each one works, or doesn't.
Post that list here.
HINT: The list of items that do NOT work when the breaker trips are your prime suspects for the problem.