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The Solar Cross e-bike by Terry Hope of R&D company thekpv has eight 0.1kg photovoltaic panels with reflective sides for indirect sun exposure that power the 22kg bike to a frisky 7km/h.

Granted, it’s not what you’d call aerodynamic, but it only cost $500 to build and wind resistance isn’t really a problem at 7km/h.

designboom