As the title suggests, this is a video showing an OLPC computer running directly off a solar panel. They suggest it might be the first computer able to run directly off a solar panel. The process is demonstrated with a 10 watt solar panel. In case you're wondering (I was) a 10 watt solar panel costs between $50 - $150. As can be seen here. And they make a good argument in the video about why they're still producing computers when tablets are so cheap now - they are pushing the envelop on power usage and screens that can be used in bright sunlight. Good points, both. Oh, and just for contract, it takes around 80 watts to power a MacBook Pro.