Mobile solar modules can produce up to 40% more power than static ones because they track to always face the sun. The key idea is to design a system as a kit so that people can easily set it up themselves. The tracking system is conceived of as totally Open-source in both its software and hardware. The importance of Open-source is that it allows you the user to be able to improve the system, to adapt it to your needs and/or just to repair it.
Here is the site of the project.