Cambridge-based startup Polysolar is developing see-through panels that can be designed into buildings, greenhouses and canopies. Their goal is covering as much of the building as possible with photovoltaics. Traditional solar panels have to point directly at the Sun. Polysolar’s panels, however, can be used on walls, rather than tilted-south facing surfaces, because, according to the developers, they are good at scavenging low level, non-directional ambient light. http://www.wired.co.uk/magazine/arc...lysolar-startup-solar-panels-renewable-energy I don't know, but idea of placing solar panels as windows seems illogical and inconvenient, despite what company says.