PCB Case

When you design a PCB you have lots of ability to route the edges and internal shapes the way you want. Why not use the same material that is used for the circuit board for the actual case? FR4 PCBs are thin, strong, silk screened, have smooth edges, can have very precise holes drilled anywhere you like. These are all good qualities to have for case design. This is the reason ElectroDacus decided to make his Solar BMS (Solar Battery Management System) like this. If you are interested in the product there is a Kickstarter for it with lots of time left and good traction.  

Via: EEVBlog Forum.