( " Solarfun " or " the Company " ) ( Nasdaq : SOLF ) , a vertically integrated manufacturer of silicon ingots and photovoltaic cells and modules in China , today announced a capacity expansion due to anticipated demand . � � Solarfun will increase its PV module production capacity from 550MW to 700MW by April 2010 and its PV cell production capacity from 360MW to 480MW by July 2010 .