The Czeers MK1 (pronounced Caesar’s?) is supposedly the first solar powered speed boat. The 10-meter vessel is completely covered in photovoltaic cells that allow to transfer sun rays into energy that can power the boat to speeds of 30 knots (that’s about 35 miles and hour). Obviously there are faster boats out there, but considering the amount of fuel those use, if you’re looking to save a buck on the water as much as on the road, then this could be your best bet. There are sail boats too – wind power!