We believe in producing energy where people actually live; in our cities. And we will do this without sacrificing beauty, the transparency of a window, or a comfortable living environment.

The problem [with solar power] is the low efficiency: 80% of installed panels worldwide have a performance of 15% or lower; if the panels are not tracked with the sun, the average of annual tilt losses add up to minus 70%.

[W]e reached the conclusion that the perfect shape of the ball lens not only has excellent energy transmission, but also the capability to concentrate diffuse light.

The gigantic ones are close to €10,000, but the smallest ones are only about €150, and can generate enough power to charge a cell about one and a half times a day.

No word how these rates are affected by living in Seattle or London.

Via rawlemon.