We have the portable one and I prefer it mostly for the same reasons borderbrae mentioned. Here in the PNW, we don't get much sun and most campgrounds are heavily tree-ed, so being able to move it around helps a lot. The downside is moving it around, and...unexpected things, like...dogs. Once we were in Elk Meadows campground in Prairie Creek Redwoods SP in CA. After dark, a jerk was strolling through the park and his let his dog run off leash, the thing ran right past where we were sitting enjoying the campfire and pee'ed on the solar panel!! Did the jerk even apologize? oh, heck no, when I yelled that his dog had pee'ed on my solar panel he didn't quite run away but he sure did mosey on mos' tick. Times like that, you wish the solar panel acted like a hot fence for livestock...try peeing on a hot wire, dog!!!
However, Dutchman's comment about his rooftop mounted solar panel being available to charge all the time, even on the road...that's pretty nifty. Maybe we'll go his route...one atop the Casita and the 90 watt on the ground.
These are the voyages of the small ship, "Grus Egg".
2011 17" Spirit Deluxe, "Grus Egg"
"Civilization began when we stopped eating horses and began riding them."