Yea I'm torn, I have 65 acres in NW Arizona and was going to put them on a 5th wheel toy hauler but it's not worth it unless you never move it and then the racking and height would cause other problems with wind loading, bi-facials need to be right at that 1 meter window for max gain.. which leads me to ask, what about all the gazebo's their putting them on now, i guess if you throw enough panels at it, you make up for the loss... i'll probably just do low racking for all mine, if you're going to do that, you might as well put white rock ect underneath as well... you either do bi-facials 100% right or it's not worth doing at all. As Wills video shows, they're not the gift everyone thinks they are unless you dial them in perfectly.... a lot easier just to use mono's and toss a few extra in than dick around with height,white rock etc... I got mine SUPER cheap or wouldn't have bought them to begin with.