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Solar-Cross (e bike) |
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Welcome, I'am Terry Hope a self-taught solar electric vehicle builder, after committing 3 years of my life building my first solar electric vehicle (THEKPV), I had learned enough to begin another solar EV project which I named SolarCross. This solar EV is built upon an 1998 Specialized FSR mountain bike which cost me $200 with an additional $500 to convert to solar electric. Efficiency and portability are key features to my ebike design, like the custom freewheel crank that consists of one sprocket and two chainrings. On the outside is a 80T - 0.25" chain sprocket which the electric motor drives, inside this sprocket is a 42T mtb chainring and behind this is 22T chainring. The 22T chainring can reach a speed of 22km/h while the 42T chainring can achieve 40km/h and +50km/h is possible with the rider pedaling along with the motor. |
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Mid-Drive Electric Bike |
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Specialized FSR E-bike 2012
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Solar Power E-bike on 3 volts (sub 15 watts) |
Solar Cross PVLightweight design is important to an agile solarbike, the custom solar panel fairing and windscreen which I hand built using aluminum angle, aluminum rivets, and 1/8" polycarbonate is one-of-a-kind. Photovoltaics consist of 18x 6"x6" mono crystalline solar cells @ 3.8-4watts output each and controlled to recharge two cells at a time from the battery.
The test ride was conducted at a right angle to the afternoon sun - Only 3 volts solar power ! I even switched between 3 gears... WOW interesting !! Bad news: subsequent 5t-80t drivetrain testing twisted the motor shaft into two pieces. (spinning the rear wheel in gravel while sitting on the ebike)
SolarCross E-bike by Terry Hope - 05.15.2011 Tel: 011 562.726.3411
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