At first it lookes like an integrated solar cell with a DC motor, but it seems to be much more than that:
http://www.wipo.int/pctdb/images4/PCT-PAGES/2008/292008/08084559/08084559.pd f Hoyt Stearns Scottsdale, Arizona US
At first it lookes like an integrated solar cell with a DC motor, but it seems to be much more than that:
http://www.wipo.int/pctdb/images4/PCT-PAGES/2008/292008/08084559/08084559.pd f Hoyt Stearns Scottsdale, Arizona US