I think that a sheltered RV will last longer than one that is unsheltered. Before I got this shelter, every time there was a strong rain storm I worried if I had a leak in the RV and where it was leaking.
I recently purchased a Honda EU3000i generator. During summer travel I run a generator all day to power the air conditioner in my Wildcat so restroom breaks and lunch can be enjoyed in comfort and also to power a crock pot for the evening meal. I wanted some way to protect the generator from the weather.