Board Thread:Questions and Answers/@comment-208.107.154.62-20140107062443/@comment-23270394-20140107164313

Make sure the cable is not connecting to the side of the batbox with the orange circle in the center, that is the output face. The input is any of the blank sides. If you already knew that make sure the solar panel is functioning (right click on it, the square sun should be lit up). If it isn't, make sure the panel has a clear view of the sky, it is daytime, and it isn't raining (even in the desert). This is assuming you aren't trying to use a redpower solar panel.