I had to double check wikipedia but I am pretty sure Google isn't involved in any Solar Impulse R&D or financing. I had the chance to discuss for a few minutes

I had to double check wikipedia but I am pretty sure Google isn't involved in any Solar Impulse R&D or financing. I had the chance to discuss for a few minutes with one of the founder (don't think it was the one who went from Bxl to Paris in 16hrs). Really nice guys. They are lean and high-tech. They were the first to be able to fly the plane a whole night without refuel (obviously). At the time they were still operating the first version of the plane. The next (or current one) should have a pressurized cabin.