Building your own utility-style horizontal axis tracker: Has anyone done this? Or who can I buy one from? As I'm working on home solar plans for next year, I'm recognizing that I'm going to need a ground mount system, because for a combination of reasons (setbacks, shading, load ratings, angle, and smallish roof to start with), mounting on my roof isn't likely to work. If I do mount stuff up there, I'll still need to supplement with ground mount, and, well, the effort difference between "doing some ground mount" and "doing all ground mount" isn't that high. I live on a nice south facing hill, and an area to install the panels on isn't a big deal. But, since I'd like my power production to match use somewhat better (in expectation of changes to the net metering agreement my utility company is working on), which implies morning and evening production instead of middle-of-day production. And that, by my thinking, is best served by putt...