DIY means not shelling out way too much money for something you can easily put together yourself if you have the patience and time. In this spirit, Ive started compiling a list of resources for DIY solar trackers for PV panels.
Increasing PV output sounds good to me. Here is a site that has some information about what solar trackers are and how they work.
At the bottom of the article is this:
Useful Solar Tracker Links
My Homemade Solar Tracker - If you have enough carpentry skills to make a bi....

Do It Yourself Solar