I doubt George Harrison had this build in mind when he wrote Here Comes the Sun but I’d like to think he’d appreciate its ingenuity as much as I do. Check out this solar-powered keyboard project from yoohsiu on instructables:
Musicians have put actual pianos in a field and play beautiful music amidst the sunshine and birdsong. I don’t own an actual wood & strings piano, but I do have a digital piano keyboard – and I can easily load my keyboard, battery, and solar panel into my small car, and take the music wherever the road goes and the sun shines. You can too! And if you do, please send me photos…!