Sounds great. What's the <i>realistic</i> performance?<p>I've dabbled with solar powered portable electronics. Harsh reality is getting direct sunlight for prolonged periods is problematic.<p>How visible is the screen in full sun? Are the panels' output sufficient for direct powering, or is power buffering required? How long, really, to a full charge (without having to constantly shift it to track the sun)? What percentage of "full sun" is required for direct powering? Are you really willing to leave it lying out in the open for prolonged periods (rain, theft, etc.)? Not trying to bash it, just looking at the gap between "gee, never have to plug it in, that's cool" and real-world concerns.<p>From prices I've seen, the solar panels + power electronics alone would run $350.