From what I've read over on the RV forums, the HF panels work, but take up a lot of room for their output.
Supposively the charge controller and inverter are next to worthless.
Hard to beat that price, but my 135 kyocera is only slightly larger than those 3 panels combined.
I believe I read than one purchaser was only getting 2.1 amps in full sun, and determined one panel was inoperable.