Currently one of the more interesting DIY project that I am planning on doing would be the creation of my very own solar panel. Not many people know this, but the actual solar cells, from which solar panels are created, are quite cheap. And they are even more cheaper if you buy broken solar cells in bulk. Broken solar cells are factory defects which have a chip here or there, but they function just fine, with minimum loses of capacity when compared to a whole solar cell. I guess you could call what I do building a DIY solar panel on a budget.