Solar Panels don't just have to be used to generate electricity. they can be used as an instrument by themselves. If you have a sound source give it a go! (even if you don't have a sound source check at the bottom of the description). all you need is a solar panel and a way of connecting it to whatever you have. in the video i use a broken guitar cable. but you can go proper like at the end of the video with the 5 solar panels on a big panel with jack sockets. you can plug it up to readily avail