The amount of solar power you need on your RV varies depending on your needs. In the main, each RV owner needs to determine how much power they need to figure out what size RV solar systems they need. Other considerations that need to be taken into account is simply the amount of space that is available on your RV roof. Sometimes you won’t have space for one big RV solar panel, so the best RV solar panel for you will be two smaller ones.
There are some online calculators that will help you calculate how much power you use and from there you will be able to figure out what size RV solar systems are suitable for you.