This is what a solar powered 3D printer looks like
Markus Kayser - Solar Sinter Project from Markus Kayser on Vimeo.
The Solar Sinter is a cool art project by Markus Kayser. Yeah, it's not going to replace energy alternatives- but it shows the power of the sun, using the Sahara for this project. If you doubt the sun's ability to provide truly massive amounts of energy, just show them this video.