Check out this video link a friend sent me. This is a pretty awesome use for a time-lapse video. Imagine how cool it would be to see this in person. Be sure to select set it to full screen and select 1080p to get the full effect of this video. You can see lightning storms going on and watch the solar panels move to keep collecting the most light. You also get to see the sunrise right at the end of the video.
I have done several time-lapse videos in the past, but this gives me a renewed drive to come up with some cool things to represent via time-lapse. Stay tuned.