Solar is a multi-faceted tool. There are lots of different ways to use it...and each tailored to a specific job. Before jumping in...you have to ask yourself...
Will solar perform for you?
Latitude ?(Sun Angle)
Clear View of sky? (Dense forest in the Pacific NW vs. Arizona desert)
Climate? (Temperate allowed open windows vs Hot Florida in Summer requiring Air Conditioning)
Coach Specific Load analysis...(Dometic fridge v Residential fridge...AC appliances and how many amp hours you typically consume.
On the Light end of the spectrum...keep batteries topped up, minimal loads, charge a cell phone routinely ////all the way to power users...running a full suite of electric appliances, totally off-grid, no reliance on Generator.
I also think having redundancy is a very nice function. We where leaving the Florida Keys in late Jun when our Generator failed to start. The occurred at the same time the filter dryer on our dash A/C got plugged. Luckily, solar meant being able to run one rooftop air on the way home. The generator turned out to be a screw that came loose inside and was getting sucked up j to the governor, causing the control board to shut down due to erratic speed data. Anyway...placing all of your eggs in one baskets sometimes backfires.
I like being able to rally off grid...and use our generator very little. But...you still get to listen to everyone elses generators...as obviously, many folks don't use solar. And for some reason...they love to line the coaches up so the generator exhaust from one Class A points directly into the entry door of the next rv. I digress.
It can be a rather hefty investment...so if it is worth it,nor not, is a very personal choice. What you want to power with it...and whether or not you can get the required sunlight onto those panels.