actually, solar is NOT cheap... that's the problem.
taylorbob1, with a 'used' Palazzo, is doing it just right -use what you have, it's already designed to do just what you need. Why so many are 'afraid' of their generator is beyond me, though it's a 'natural' initial concern that so many have. A generator is nothing more than a small 'lawn mower' that gives you 120v power whenever you need it, whether the sun is out, or not.
Solar, though, is so limited to certain 'times' when it can be used, and only saved 'if' you have enough storage, i.e. BATTERIES, to contain it - all of that makes for expensive 'upgrades', especially when you already have an onboard generator that you already 'paid for'....
I've done many calculations and 'real world' comparisons of trying to make solar work, over the use of the diesel generator, and it's never as 'easy' as we want to think it is. We bristle at the thought of the 'sound' or 'noise' of a generator, even though they actually are NOT really that loud, and the cost of diesel or fuel to run it, and yet we will go out and purchase 'expensive' solar panels, controllers, wiring, and sometimes the aforementioned additional needed 'storage' batteries, all to keep from having to 'hear' that dreaded generator sound.
The issue is that the solar is not going to provide power for air conditioning, which will continue to require the use of the generator, anyway. During that time, the solar is no longer in play, as the battery charger is now taking over that role. While traveling, the Alternator does the charging, at least for motorized RVs, so again, the solar is not in play. The ONLY time solar is in play is when parked.
If you are truly travelers in the RVing world, then the time you are parked is a small portion of the time that solar can add any value, IF the sun is out that day, and IF you are not parked under shade.... so many 'IFs' with solar, at least for travelers.
I always say that the best course of action is to first get more 'storage', meaning more battery amp hours, which for most, is more batteries. Where to place or store them can be a chore, but ultimately, even if you later get solar, you 'need' more battery storage anyway, to make the best use of your 'solar investment'.
Solar is like water - it's a great thing to have when you need it, but if you have no where to store it, it is very allusive and unusable.
two Campers, two Electric cars
former diesel pusher traveler