The “Solartrike” is a solar-powered bike that “can go 15-18mph and 10 miles per charge.” It sports either a 200W or 400W motor, 80W solar panel, and a 2×2 square steel frame. Prices here. Video after the jump.
Some can be set up to go as fast as 25 miles per hour. They take 6-8 hours per charge. They can be custom designed