fyrflie wrote:
https://www.parkedinparadise.com/solar-calculator/
This is just one of multiple places to look to answer your question.
But, rather than build a system just for the RV, why not look into building a true off-grid power system.
Well, you stepped in it with that last question. The realistic, factual answer is that none of the "alternative energy" options available today are ready for prime time. This is why none of them would exist were it not for the massive government (taxpayer) subsidies they receive. Can you say "Solyndra"? Tesla is another example. Wouldn't exist without subsidies, big ones, subsidies that YOU pay for through your taxes.