I'm looking at this, but my roof situation doesn't work because of the trees, siting, etc. It's not just cutting my own down, it's my neighbors' trees, too.

However I have a place in my back yard where a (mostly) stationary installation would work. I say mostly stationary because it's south-facing and I'd have to adjust the slope higher in the spring and lower in the fall for best power. (Friends from work do this.)

Do any of these companies do installations like this?