Credit: Solarbike/Slashgear
Photovoltaic cells in the wheels charge the torpedo-shaped battery mounted on the down tube.
Charging will be slow when riding the bike, as the angle to the Sun will be far from optimal except at sunrise & sunset, when little light will be available anyway. For this reason, it will be necessary to park the bike carefully to optimise sunlight exposure. At some latitudes, e.g. at the Equator, it will be best to lie the bike flat on the ground.
Note that full wheel covers which are part of the mounting system for the photovoltaics will improve the aerodynamics of the bike.
My guess: solar charging may make a worthwhile contribution to electric power use, depending on where & how it is parked, as well as the latitude, but plan on charging from a power point as well.
http://www.slashgear.com/solarbike-has-solar-panel-wheels-07377736/
http://www.engadget.com/2015/04/06/the-solarbike-is-a-very-real-thing/ / cities walk public transportation bicycle bike ride bikes peddling swear sweaty work electric bikes battery packs recharged Solarbike battery electric motor plugged recharge battery solar panels embedded both sides wheels parked power gathered solar panels battery solar panels sideways power solar panels face towards sun range 43 miles battery fully charged plugged in charged charging charge
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