Solar Sinter - 3D printing by sun power!

Solar Sinter is made up of seven stations: a photovoltaic panel, the focal point which draws the sun's rays on the melting sand, a sun tracker, fresnel lens (for magnifying the rays), a battery, controlling electronics, and a small, reflective, silver tent dubbed the "office".

 Video Link:
 Markus Kayser - Solar Sinter Project